Tuvtel issue2 EN

The Children's Magazine by TĂœV Rheinland

2014 | Edition 2

Posters Waterfalls and Big Ears

T

Co ol: Staying icksters r T o m r e he Th

u Testing o Y e r a What Sli des r e t a W There? ck-Up e h C a t Ge

A lwa ys o n th e Ball

Contents

In this issue, you‘ll find ...

Fast Facts 4 Soccer 6 Air Conditioning 10 Tess and Roby 12 Behind the Scenes 16 Think Twice 18 Try It Out 19

19

t Try It Ou

6

qualization Pressure e at ns – does th with balloo s tel perform work? TÜV t. n e the experim

Always on the Ball

cience

behind the A glimpse Vtel goes to scenes: TÜ water slide work with r. ans Küppe inspector H

TÜVtel

2

r

16

Testing u o Y e r a t Wha There?

Pu

S

Soccer is much more than just a game. Learn more about the history of the world‘s most popular sport.

Tess and Roby

Hey, TÜV kids!

The two friends sh are a spo camping oky adventure .

Around the world, people play nearly 500 different types of sport. But one of them is a huge favorite: soccer. Our ancestors in China were kicking balls around as early as 4,000 years ago.

Those ones were made from sewn-up bits of leather and filled with animal hairs and feathers.

12

However, England was the origin of the soccer match as we know it today.

There, the first rules were established about 150 years ago.

10NSweat?

In TÜVtel, you‘ll discover how soccer was transformed from a massive brawl over a ball made from fabric pieces into an orderly match, as well as plenty of other special facts about the popular ball game.

o Thanks!

Enjoy reading TÜVtel!

Air conditioners make our lives easier on hot days. Animals have their own tricks.

re

Posters lls çu Fa

Igua

Spectacle A Gigantic

Chill Out, Big Ears!

by Franz Gerg/Comic-Ag

entur Roberto

Freire

The fennec lives in hot steppe regions deserts. To stop itself and from overhea little fox uses its huge ting, the ears as heat If it gets too warm, exchangers. the blood dilate and vessels in release the its ears extra body air. Its relative heat into , the arctic small ears. fox, has extrem the That is often ely that live the case in icy cold in animals regions. hardly lose That way, any heat they from body. The same phenom that part of their in brown enon can bears and be observe polar bears. d

leugenio/ leksele/123RF; Freire Corbis/fotolia; entur Roberto tsoergel, Palenque, Gerg/Comic-Ag Maria, nstanev,Tess illustration by Franz Gino Santa Roby and Photos: RedTC, iStockphoto;

BURDE Photography,

christian-colist

a/fotolia; Tom

Tietz/123RF;

Roby and Tess

illustration

Like the fennec, the African pumps warm elephant also blood into them to cool its mighty ears. It fl down the aps blood, which back into the body then flows to refresh animal from the thick-sk the inside. inned Asian elephan much smaller ts have ears. That live in colder is becaus e they mainly forest areas the huge cooling system and don‘t need counterparts. s of their African

andreanita,

World Cup: the 2014 only hosted to offer. wonders Brazil not many natural mists and It also has water, fine and masses of the 20 large Thundering Together, biggest rainbows: form the dazzling in Iguaçu on the border waterfalls 255 small It is located water in the world.

There, the waterfall Argentina.

Brazil and the depths. n into betwee meters shelter to up to 80 plummets , ds it, offering st surroun there is buzzing The rainfore Everywhere . ies animals us butterfl countless . Lumino ngbirds and chirping tiny hummi croaking the air and owers. A float through colorful fl rowth. nectar from the underg sip sweet silently through screaming in slinks heard jaguar es s can be the screech Excited monkey ersed with e, intersp you‘ve been the distanc Once . the h macaw of a hyacint never forget Falls, you to the Iguaçu of nature. spectacle gigantic

javarmann,

in Brazil The Iguaçu Falls through the thunder loudly h quieter forest. It is muc the in the desert with still prick fennecs, yet they hy? Read up their ears. W d out. the posters to fin

Big Ears

Photos: stev0509,

Pu

re

N

u at

Tess and Roby

TÜVtel

3

Fast Facts

Hot slide

Massive

The inte rnet is h uge and it is cons tan tly getting bigger.

Unbeliev able vo l umes of data are bein g uploade d ever y day.

Take the vi deo po rtal Yo uTube , for exa mple.

If yo u w ante d to watch all the v i deos th at were adde d t o it in j u s t o ne day, it w o uld tak e yo u m than 16 ore years. C razy!

nd heinla TÜV R tly requen also f s new upload to vi deos be.

Yo uTu

Yo u can burn yo urself on a hot sto ve. Everyone knows that. But the same thing can also happen to yo u at the playground.

If a metal sli de is stand ing in the blazing sun, it becomes ver y hot.

That is because metal can absorb and retain heat extremely well.

TÜV Rheinland gives the all-clear for equipment made of wo od or plastic. These materials do not heat up and cannot burn yo u.

wer o t l e iff The E ing! w o r ris is nd is g in Pa a

er gh rs hi l Tow e e t f e f i as m The E han 320 at is h T . t , so tons more hants ess ,000 p 7 e l s e h t gu 000 weig as 1, g iant. Bu y up to h c u b a m ing at quite it is It is grow t does th ron i I ? what timeters! cause the ter, n n e i 15 ce um mer b at. In w the s e h y in as r e a h g t a eve in rinks ract. nd s expa ucture sh ron cont tr he i the s kes t a m co ld

TÜVtel

4

fel The Eif s Tower i 5 2 1 already d. l o s year

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igh flying h

toys d new n a r b any toy ear, m at the e r e es i Each y m bes t on eir pre e h t h T e . v g a h bu r Toy Nurem e d the l l a c fair in e nners a priz ar's w i e e v i y e s c i e h r f t ini. One o ontro lle d m Award c no e is Na remote m a a s n a s w It ix copter. y for s fl quadro n a nd it c Q uad a me. at a ti s e t u n mi

brutal bl oodsuck ers are littl e

ls

hoever O uch! W down sli des ll get here w i ng hot a burni rise. surp

Ticks vampire like mo s. With t uth part heir spin s , they pr o ut blo o eick the d. They skin to like bitin it doesn suck g legs b 't hurt, y es t. W hil o u can bite. e get sick f ro m a tick The tiny creature s usuall grass or y sit on among t blades o he leave their ne f s and w xt victim a i t . f o A r r garden, e yo u of in parks ten in th , in mea e the fore dows or s t in the n e a s r u m mer ? TÜ has so m V Rheinl e tips on and how yo u yo urself can prot f ro m tic ect k bites: • Wear l ig ht-co l ore d clo spot tick thing: It s s traig h helps yo t away.

• Co ver u to up: Prot ect yo ur long-sle ar ms an eve d shir d legs w ts and l • Keep y it h ong pan o ur feet ts. safe: We shoes. ar socks and clo • Lo ok se d closely: G et yo ur yo u all parents o ver aft to check er o utdo or adve ntures.

If a tick does ge t ho ld o carefull f yo u, it y be rem sho uld o ve d im m of tick e d iately tweezers w it h a p or a tick air card.

TÜVtel

5

Soccer

l l a b e h t n o s y a w Al Nothing gets kicked as hard but at the same time loved as much as a soccer ball. For many thousands of years, it has dominated the playing field. However, a lot has changed about it over time.

A ball tells all.

"I am in high demand. People run after me wherever I roll or fly. Everything on the field revolves around me. I am the round thing that has to go into the rectangular hole. I am a soccer ball.

I bet you are thinking: "Ha ha, he is so full of hot air!"

But honestly, would you want to play with me if I was all floppy? Probably not. And I want to play! I want to be passed, dribbled and slammed into the nearest goal with plenty of oomph - at least as well as my famous relative Brazuca, the 2014 World Cup ball from Brazil.

He is a real star right now and he looks great with his unmistakable colored loops. But when it comes to being kicked into the opponent's goal, we are all just the same.

Read more on page 8 →

TĂœVtel

6

Soccer is the most popular sport on our planet.

St ad iu m Seat s Under Scr ut iny

with: ve a lot to cope Stadium seats ha then up cheering and Elated fans leap ain. es back down ag plonk themselv forth and ously back and They slide nerv te that, sts wildly. Despi shake the backre t to tators still wan of course all spec is why mfortably. That sit safely and co , TĂœV testing institute at the furniture adium ines whether st Rheinland exam rain. and the heavy st seats can withst

In the hot seat: These chairs are being rocked, pushed, pulled and shaken for all they're worth.

A Q u ick Wave An unexplained phenomenon: Mexican waves almost always move in a clockwise direction.

A Mexican w ave speeds through the stadium at a rate of about 12 m eters a secon d.

That makes 20 seats per se co nd, a fact that w as established by physicists fro m the TU Dre sd en university usi ng video foo tage.

In compariso

n, the world's fastes t runner, Usain Bolt, co vers 100 meters in 9.58 seconds. At that pace, he wou ld not stand a chan ce of catching up with the speedy wave.

TĂœVtel

7

Soccer T hom i m pr a s M Ăź l l e r e h i s s s s e s w it h p a bi l it e e d, s c o r i ng ies a non s n e n s e d no s t yl e pl a y i . ng

Ba stian Schwein ste iger scores point s for his creativit y and pre cis e pa sses.

A s t he c apt Ph il ipp L a in, a h m is res pon s ib le h is t ea m for .

Mats Hummels is known for his brilliant technique and fair play.

Tsu Chu came first What many people dream of: kicking like a pro from the German national team.

The Chinese already played a game similar to soccer more than 4,000 years ago. It was called Tsu Chu and the aim was to get a leather ball into a narrow net that was attached to two bamboo poles. The players could only touch my feather and hair-filled ancestors with their feet, chests, backs and shoulders. To be a great Tsu Chu player, you needed a whole lot of practice and agility, as well as very good body control.

Brawling for the Ball It was a completely different story in medieval England.

Brute force was what counted there. I would not have liked to have been in use back then. The balls were made of scraps of cloth that were held together by a net and they were as big as medicine balls. They were not very attractive, I tell you, especially not after they had been trampled on for several hours by countless feet. At the time, it was not just two teams of 11 players competing against each other for 90 minutes, but two entire villages playing for several hours. The town gates were the soccer goals and everyone could join in. There were hardly any rules. People would push, kick and hit each other. They could do anything they liked to get the ball.

TĂœVtel

8

Miracle C leats

rollably er players slid uncont For a long time, socc ther lea ugh shoes that had over the ground in ro ny les. They missed ma cleats nailed to the so time in the process. Just in scoring opportunities i Dassler, p in Switzerland, Ad for the 1954 World Cu ped mpany Adidas, equip the founder of the co had th soccer shoes that the German team wi cleats. With those on replaceable screw-on team defeated the their feet, the German team 3:2 and took very strong Hungarian title. The legendary home the World Cup the Swiss capital of match took place in refer to it as the Bern, so many people "miracle of Bern".

Rules upon rules

Professionals like Julian Draxler never go out on the field without cleats.

Because soccer mostly ended up causing a major brawl, the authorities tried to ban it time and time again. They were not successful, which is lucky for me because otherwise I would be totally useless! However, they did gradually introduce more rules to reduce the number of injuries. While things are not quite as rough these days, soccer players still jostle, jump on and push each other, so now there is a referee to keep everything under control. For 124 years, the referee has been the only person in charge, constantly reminding players that along with a flawless technique, a good game also requires fairness, team spirit and self control.

Not only the players had to follow new rules. Nothing was left to chance on the field either - at least not in today's Ende professional soccer. For example, the playing field for the World Cup has to be exactly 105 meters long and 68 meters wide. The distance between the goal posts is 7.32 meters. Each link in the goal netting has a diameter of 12 centimeters. And so on and so forth. Of course, you don't have to worry about all of that if you are just going out for a kick. All you need is some space, two goals, a few friends and one of my colleagues. And a lot more team spirit than people had in the Middle Ages!" ;-) The end

Did you know?

At the RoboCup German Open, 27 German teams qualified for the robot world cup.

lel to p in l a r a P d Cu e also l r o the W obots ar r fo l, r Brazi ompeting the c y in up. h p o a tr l RoboC a annu Every internat i goal ne onal t 2,800 has holes.

Goal keepers r Neue like Manuel irs of pa use over 50 ason. gloves per se

Brazuca is the

offi the 20 cial ball of 14 Wo rld Freely t ranslate Cup. d means e motion, , that pri warmth de and .

TĂœVtel

9

Air Conditioning

A brilliant invention cools people down on hot days.

Sweat? N Luckily for Tess, Roby remembered to pack the fan.

s ters Ther mo -Trick nnot sweat.

Many animals ca own tricks to They have their beat the heat.

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102

Tong ue out Pant the s ing makes aliv mout a in a dog h evap 's That o r a t help e. down s it cool from inside the .

headstand whawk The meado s abdomen it s e h c t e str un so that s e h t s d r towa rays can t o h r e w e far f strike it.

A cool s wim Birds lik e take a ba to th and fluff the mselves up to stop too muc h heat accumula ting und er their fea thers.

? No Thanks!

In ancient Egypt, the rulers made their servants fan them with giant fronds. That must have been exhausting - at least for the servants. An appliance that cooled the air automatically would have been much more practical.

Such a device was invented many thousands of years later by the engineer Willis Haviland Carrier. He spent a long time tinkering away at a machine that could cool down warm air, clean it with filters and then moisten it. It was finally ready for use in 1902, but sadly nobody wanted to buy one. It wasn't until 12 years later that he managed to convinced a cinema owner in New York to install one of his cooling units. The moviegoers loved it. That was the breakthrough for the air conditioner.

Today, air conditioners are in great demand.

They cool down huge buildings like airports, production plants and supermarkets, as well as houses and cars.

ling Electric Co o

itioners. The es with air cond m ho r ei th ol co m one place Many people sporting heat fro an tr of sk ta e th appliances have ere. en releasing it th th d to another an consist popular. "They ry ve e ar s em st oning sy e house and Split air conditi located inside th is or at or ap ev e n Scheuer. The of two parts. Th " explains Stepha e, id ts ou is r se and describes the conden from TĂœV Rheinl es nc ia pl ap al ic expert on electr . nditioner works co r ai how a split inside the indoor rant evaporates ge fri re A : is th e room.

It goes like up the heat in th s ke ta d an s ga a unit, turns into pipe and is then tdoor unit via a ou e th to d re uefies again It is transfer e refrigerant liq Th . at he as r ai e pe. released into th ugh a second pi indoor unit thro e th to in ck re ba peratu has and flows sired room tem de e th til un s ue The cycle contin been reached.

Liquid refrigerant

Outdoor unit The split air conditioning cycle Indoor unit

Get d irty Mud p a c k s prot ectio offer heat, s n unbur against n thos e pes and also ky b flies. iting

Gaseous refrigerant

TĂœVtel

113

Tess and Roby

The Spirit of the Forest Tess and Roby are looking forward to camping out in the tent. Then the witching hour strikes.

“And suddenly there was a terrible creaking. The bark sprang off the trunk of the old oak tree and a hideous, scowling face appeared. It was the spirit of the forest. With its flashing yellow eyes, it stared furiously at the children. The oak's branches whipped wildly through the air while the roots shot up out of the ground and tried to grab hold of the children. Nobody knows if they escaped because they were never seen again.”

Tess paused dramatically.

“And, are you scared now?” she asks her friend Roby, giggling. No of course Roby isn't scared.

After all, there is no such thing as a spirit, let alone a monster tree. But then a good horror story is part of the deal when you go camping.

Bread on a Stick For this tasty campfi re treat, you need 500 grams of flour, 1 sachet of dry yeast, 2 tablespoons of salt, 2 tablespoons of oil, 250 milliliters of warm water and some sticks that are as thick as your finger.

This is how it goes: Kn ead the ingredients into a dough and let it stand for one hour (preferably in a warm place). Roll the dough into sausages two centimeters thick and wrap each one around a stick. Hold them over the embers and turn them slowly until th e bread is golden brow n.

TÜVtel

16

126

A cloud passes in front of the moon and the sky above the forest campsite darkens. Tess yawns. A few bats flutter around the tent looking for tasty insects. Then everything is still. Tess and Roby decide to go back to their tent and cuddle up in their sleeping bags. Suddenly, a loud screech pierces the night. Roby gives a start. “It‘s only an owl,” says Tess reassuringly. But then there is something else. A gentle rustling. “Do you have an explanation for that, too?” whispers Roby.

Campfir

e check Lis

Tess listens. Something makes an ominous cracking sound in the bushes. A rabbit, perhaps? The friends peer apprehensively into the darkness. Tess shines her torch around.

And then something unbelievable happens: Someone is staring right back at them! Two enormous yellow eyes are glaring at them.

Frozen with fear, they hold their breath as the eyes come closer. And closer. Then Roby can't stand it any longer. He cries out “Aaaaaaaah, the spirit of the forest! It's coming to get us!”

t

Campin g witho ut a fire ketchup is like ea : really b ting frie oring. B s withou The TÜV ut you h t Rheinlan ave to d d fire sa o it prop tips for fe t erly. you: y expert s have s ome • Alway s only b uild a ca • Light it mpfire in togethe a permit r with a ted area • Make n adult sure it is a s a fe distan burn, lik ce from e tents, things t bushes • Pay att hat can or trees ention t o the w flying sp in d . It can c arks reate da • Keep a ngerous bucket o f w a • After y ter near ou have by for e mergen extingu or dirt o cies is h e d the flam ver the a e s s h , e s s and ch catter sa really go eck that nd ne out the fire has

Continue reading on page 148 →

TÜVtel

137

Tess and Roby

Tess tries to jump up but Roby is clinging desperately to her leg. They tumble over each other. Startled by the commotion, the owl screeches loudly from its tree. Tess crawls frantically into the shelter of the tent. Roby stumbles in behind her. “Shut the tent! Quick!” cries Tess. Roby tugs wildly at the zipper.

Zzzzipp! Made it! Inside, they cower in their sleeping bags in complete silence. Tess can feel her heart racing. Roby the little robot is trembling so badly that his steel joints are rattling.

“Go away, go away, go away,” he whispers, screwing up his eyes. Then he tugs his sleeping bag over his head with a jerk. His plan is to see nothing, hear nothing and simply wait until the spirit disappears. Tess notices a shadow creeping along the tent canvas. She watches as it stops, pauses for a moment and then grows further away again. Her heartbeat calms down. Tess takes a deep breath. “I think it is gone. Should we go home and sleep there instead?” she murmers in Roby's direction. The robot pops out from inside his sleeping bag.

“I'm not moving a single centimeter from this tent until morning,” he says, burrowing back into his sleeping bag.

TÜVtel

148

While Tess is still desperately trying to work out what just happened, she is overcome with tiredness and falls into a restless sleep.

“Meow.” Tess opens her eyes. Phew, luckily the spooky feeling has gone. She still feels exhausted though. “Meow, meow.” The sun shines on the tent, bathing the interior in a soft golden light. “Meeooooowww.” What on earth is that? Tess creeps out of her sleeping bag, opens the tent and peers out cautiously. A little cat is sitting there, watching her with big eyes. Tess pauses. Those eyes, hmmm, somehow they seem familiar to her. Suddenly she realizes.

“Roby, look! The spirit of the forest has come back.”

Roby untangles himself from his sleeping bag and peeps warily over her shoulder. The kitten blinks at him cheekily and then leaps elegantly into the bushes. Tess and Roby look at each other and grin.They swear never to tell anyone that they thought a tiny kitten was the spirit of the forest.

The end.

night Vision Some animals ca n see very well in the dark, incl owls, deer, foxe uding s and cats. They have particularly pupils that can large detect even the tiniest spark of It lands on the re lig ht. tina, where ther e are many cells respond to light th at and dark impuls es. These cells ar called rods. We e humans also ha ve rod cells in ou but we have far r eyes fewer of them.

That is why we at all well at nigh ca n‘ t see t. But then we do n‘t need to. Aft we are asleep. er all, TÜVtel

159 19

Behind the Scenes

?

u o y e r What a e? r e h t Testing

The more of your body is touching the water slide, the slower the ride becomes.

Water slides!

Inspectors in Flip-Flops Hans Küpper is on an important mission. Today he wants to find out whether the water slide at the Aquapark in Majorca is in good shape. He doesn't have any tools with him. Instead, he has brought one of his colleagues. After all, two pairs of expert eyes see more than one.

First, the inspectors look at the construction. The base and attachments have to be stable and must not have any rusty areas. That happens fast at indoor swimming pools because the air contains high levels of moisture and chlorine that damage the steel.

Next, they check the surface of the slide, paying particular attention to the areas where the individual sections are joined together. If they are not connected properly, they have to be sealed with silicon. Otherwise people will get bruises when they slide.

Hans Küpper Tests water slides for TÜV Rheinland and also likes sliding himself.

TÜVtel

1620

The water on the slide is drawn up from the swimming pool and the suction mechanisms have to be inspected as well.

If they suck too hard, a swimmer could be pulled into them.

That has already caused serious accidents in the past.

Finally, Hans Küpper also slides down himself. That way, he can test the speed and get a better idea of the danger spots.

His verdict today: Everything is in top condition.

SpeedY Sliding Champio n sliders swear b That inv y the th olves lyin ree poin g on you t techniq front of r back, fo ue. your che ld in s t g , c y rossing our arm lifting u your ou s p your b in tstretch ottom. O heel sho e d n le ly g y s and our shou uld be to lder blad uching t less wat he slide e s a er. Beca nd one . That w use the ay, you increase r e s is d t isplace ance is lo s. wer, you r speed

An inspector at the TÜV Rheinland laboratory tests how much a water toy can withstand.

ubbish?

Rubber r nO way!

atable es on infl d li s r te a k that w cheap jun eed down re p a s o m ls e a th n f lilos, yo You ca land tests ever, man in w e o h H R . s V y Ü aquatic to rself on. T w you knows ho injure you it n e o v s e , s n y a to you c d rubber g rings an in m ucts: im ro w s ality p d u q r o o p fy er can identi t the rubb a sign tha e b n a c nk, it e toys sti . Junk!

Nose: If th l solvents fu rm a h s contain ms. If er the sea v o y ll fu hile care yourself w ur finger o h y tc n ra u c R s : t h Hands , you mig are sharp s e g unk! d e . y e th the to J h it w g in lay you are p ark. That s a GS m a h it r e at the ck wheth means th it d n Eyes: Che a ty afe sional r tested s by profes d e in m a stands fo lly ex land. It is een carefu TÜV Rhein m o toy has b fr le p , for exam inspectors safe!

y animal: Pool part rubber The best e a GS rings hav mark.

Every centimeter of the slide is examined from top to bottom.

TÜVtel

1721

Think Twice

Sh a r p v i s i o n

Birds of prey circle above their hunting ground and scan the floor for prey. When they spot something tasty, they strike.

Their success rate is high. After all, birds of prey have the sharpest vision of all living creatures. They can already identify a mouse from several kilometers away.

That is because they have a huge number of photoreceptors in their eyes.

See

ing

One watc heading, hing t tele wo sto r v see the ision. Bu ies: Shar topi c fr t if you p vision om a not turn th That's her e fasc magazi what we n inati ng p e count all want ersp e w ecti r-clock hen we ve. G a w ive it ise, yo re u a tr 'll y!

dou

ble

Sharp vision

TĂœVtel

184

For a picture to be transmitted to a television screen, it has to be broken down into lots of individual dots. These are called pixels. The pixels for each image are transferred electronically and then put themselves back together bit by bit on the screen. This happens extremely fast. The more pixels a television picture has, the sharper the image will appear.

At least that is the case for high-quality televisions. TĂœV Rheinland checks whether their resolution is good. At the laboratory, it also tests their reception, as well as the colors and contrasts they display.

Try It Out e

Scienc

Techno

stem Spells

logy

Today: S For Science

nee

Engi

ri n g

Mathem atics

q E e r u s s e pr

STEM is the abbreviation for Science, Technology, Engineering and Mathematics - all fields that involve exciting experiments.

n o i t ualiza

3

2

You ne ed: two ba lloons, a clip and a rolled up piece o f cardb oard.

sed her e clo h t e ot t h t Pu n . on o ballo the tube f o end

1 Insert t he card board tube in to one of the balloon s. Blow up the other o ne and use the clip to hold th e e nd closed.

Undo the clip and watch wha t happens.

What you expect: You would assume that the air from the inflated balloon would flow into the empty one until they were both equally full. That is the law of pressure equalization.

But nothing happens! Why? The tension in the rubber is to blame. The air is not strong enough to spread into the floppy balloon by itself. A law of nature has quite simply been outsmarted.

They know which way the wind b TĂœV Rhein lows: land meteo rologists D Noerenberg o rle and Kai Bo rn

land natural scientists at TĂœV Rhein TĂœVtel

22

Chemists, physicists and biologists are responsible for the tests and experiments in the laboratories. But there are also meteorologists - or weather experts - working at TĂœV Rheinland. They test things like wind power plants.

TĂœVtel

22

You need:

Paper, scissors, glue

Explanation:

HOW ROUND...

... becomes square!

o: d o t t a Wh rips

st paper d stick e h t s an Glue lin der other at y c o t in ch s. to ea angle them right

Because the two circles are at right angles to each other, th e corners of the square are create d automatically.

1

Cut through the center of both circles one after the other.

The two circles become a square.

2

3

TE S S A nd ROBY The Ice Cream Break Phew, it‘s so hot today!

Tess, i‘ve got some ice cream. Would you like one, too?

Oh Yeah, I‘d love one!

You can choose: Oil ice cream with screw sprinkles or an electrified Metal Popsicle?

YUCK!

Robot Ice cream flavors!

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tel-gc@ V U T Email: The trick is to uv.com : www.t e it continue drawing s b e W beyond the balls in two places.

ay!

Good D

Wednesday!

Chill Out, Big Ears!

The fennec lives in hot steppe regions and deserts. To stop itself from overheating, the little fox uses its huge ears as heat exchangers.

If it gets too warm, the blood vessels in its ears dilate and release the extra body heat into the air. Its relative, the arctic fox, has extremely small ears. That is often the case in animals that live in icy cold regions. That way, they hardly lose any heat from that part of their body. The same phenomenon can be observed in brown bears and polar bears.

Like the fennec, the African elephant also pumps warm blood into its mighty ears. It flaps them to cool down the blood, which then flows back into the body to refresh the thick-skinned animal from the inside. Asian elephants have much smaller ears. That is because they mainly live in colder forest areas and don‘t need the huge cooling systems of their African counterparts.

Photos: stev0509, javarmann, andreanita, BURDE Photography, christian-colista/fotolia; Tom Tietz/123RF; Roby and Tess illustration by Franz Gerg/Comic-Agentur Roberto Freire

Big Ears

s l l a F u ç Igua

A Gigantic Spectacle Brazil not only hosted the 2014 World Cup: It also has many natural wonders to offer.

Thundering masses of water, fine mists and dazzling rainbows: Together, the 20 large and 255 small waterfalls in Iguaçu form the biggest waterfall in the world. It is located on the border between Brazil and Argentina. There, the water plummets up to 80 meters into the depths.

The rainforest surrounds it, offering shelter to countless animals. Everywhere there is buzzing, croaking and chirping. Luminous butterflies float through the air and tiny hummingbirds sip sweet nectar from colorful flowers. A jaguar slinks silently through the undergrowth.

Excited monkeys can be heard screaming in the distance, interspersed with the screeches of a hyacinth macaw. Once you‘ve been to the Iguaçu Falls, you never forget the gigantic spectacle of nature.

Photos: RedTC, Gino Santa Maria, nstanev, tsoergel, Palenque, Corbis/fotolia; leksele/123RF; leugenio/ iStockphoto; Roby and Tess illustration by Franz Gerg/Comic-Agentur Roberto Freire