0:00:05 > 0:00:08# If you've got a question and you don't know where to go
0:00:08 > 0:00:12# Ask Nina for some help Cos she's got a science show
0:00:12 > 0:00:15# She makes sense of her senses While helping all her fans
0:00:15 > 0:00:17# By doing her experiments with potions and with bangs
0:00:17 > 0:00:19- # Touch your tongue - Tongue!
0:00:19 > 0:00:20- # Fingers - Fingers!
0:00:20 > 0:00:23- # Eyes.- Eyes! - Ears.- Ears!- Nose.- Nose!
0:00:23 > 0:00:26# Nina and the Neurons find out what you need to know
0:00:26 > 0:00:29# Nina and the Neurons find out what you need to know
0:00:29 > 0:00:32# Luke, he helps us with our eyes and Felix, with our touch
0:00:32 > 0:00:36# Ollie sniffs out smells And Belle, she hears so much
0:00:36 > 0:00:38# Bud is Ollie's brother He helps us with our taste
0:00:38 > 0:00:41# They're Nina's little Neurons And they're coming to your place!
0:00:41 > 0:00:43- # Touch your tongue - Tongue!
0:00:43 > 0:00:44- # Fingers - Fingers!
0:00:44 > 0:00:47- # Eyes.- Eyes! - Ears.- Ears!- Nose.- Nose!
0:00:47 > 0:00:50# Nina and the Neurons find out what you need to know
0:00:50 > 0:00:53# Nina and the Neurons find out what you need to know
0:00:53 > 0:00:55# Oh, yeah! #
0:00:57 > 0:01:02Oh, hello! I'm in the middle of an experiment.
0:01:02 > 0:01:05I gave this plant special food to grow quicker,
0:01:05 > 0:01:09but I've been waiting for ages and nothing's happened.
0:01:09 > 0:01:10BEEPING
0:01:10 > 0:01:14Oh! I hear a beep, I see a flash. I wonder what they're going to ask?
0:01:16 > 0:01:18ALL: Hi, Nina!
0:01:18 > 0:01:19Hi, guys!
0:01:19 > 0:01:21We've got a question for you.
0:01:21 > 0:01:24Why does yawning make other people yawn?
0:01:24 > 0:01:25A great question.
0:01:25 > 0:01:29Why does yawning make other people yawn? I've noticed that.
0:01:29 > 0:01:33Come down to the lab and we'll investigate.
0:01:33 > 0:01:36ALL: See you soon, Nina. Bye!
0:01:36 > 0:01:38Bye!
0:01:38 > 0:01:42I'll need help to answer this and I know just who to ask.
0:01:42 > 0:01:45OK, Neurons, time to get to work.
0:02:01 > 0:02:04ALL: Neurons at the ready, Nina.
0:02:04 > 0:02:08Today's question is, "Why does yawning make other people yawn?"
0:02:08 > 0:02:12Which Neuron will be most useful to help find the answer?
0:02:12 > 0:02:15ALL: Me! Me! Me! Oh, me!
0:02:15 > 0:02:17Will it be fabulous Felix?
0:02:17 > 0:02:21I can help so very much if you need the sense of touch.
0:02:21 > 0:02:23Will it be beautiful Belle?
0:02:23 > 0:02:27I send messages to brain from ear. If there's a sound, I'll help you hear.
0:02:27 > 0:02:31- Will it be lovely Luke? - For looking and seeing, day or night,
0:02:31 > 0:02:34I'll help you with your sense of sight.
0:02:34 > 0:02:39- Will it be awesome Ollie?- If it's pongy or whiffy but you can't tell,
0:02:39 > 0:02:41my messages help your sense of smell.
0:02:41 > 0:02:45- Or will it be baby Bud? - Sour, salty, bitter or sweet,
0:02:45 > 0:02:48I'm your taste buddy whenever you eat!
0:02:51 > 0:02:55- Ah!- It's Belle.- Yes!
0:02:55 > 0:02:57ALL: Go, Belle! Go, Belle!
0:02:57 > 0:03:00Go, Belle! Go, Belle! Go, Belle!
0:03:00 > 0:03:05- Go, Belle!- Brilliant! I'm all ears, Nina.
0:03:05 > 0:03:09Today's question is, "Why does yawning make other people yawn?"
0:03:09 > 0:03:12Because yawning makes such a brilliant sound,
0:03:12 > 0:03:14Belle will help us today.
0:03:14 > 0:03:17I need to get the lab ready for the experimenters.
0:03:20 > 0:03:23Christopher likes lasagne, Kyle likes cakes,
0:03:23 > 0:03:24and Jack loves Taekwondo.
0:03:24 > 0:03:28But they want to know why yawning makes others yawn.
0:03:28 > 0:03:30So today, Christopher, Kyle and Jack
0:03:30 > 0:03:33become the experimenters.
0:03:36 > 0:03:39- Hi, guys!- ALL: Hi, Nina.
0:03:39 > 0:03:42Welcome to my science lab. Come on in.
0:03:42 > 0:03:45You asked, "Why does yawning make others yawn?",
0:03:45 > 0:03:48which is a great question. But why do you want to know?
0:03:48 > 0:03:53Sometimes, when I'm with my family, I yawn and make other people yawn.
0:03:53 > 0:03:55We want to know why.
0:03:55 > 0:03:59It is rather strange that yawning seems to make other people yawn.
0:03:59 > 0:04:02We need to do some investigating to find out more.
0:04:02 > 0:04:05For our first experiment, we'll use our senses.
0:04:05 > 0:04:10ALL: Whoop-woo! A senses experiment! We're ready, Nina.
0:04:10 > 0:04:13OK, experimenters. Tell me when you normally yawn?
0:04:13 > 0:04:15When I'm bored.
0:04:15 > 0:04:18I yawn in the mornings when I wake up.
0:04:18 > 0:04:22I yawn at night when I'm tired.
0:04:22 > 0:04:26That's true. We yawn if we're feeling sleepy or a bit bored.
0:04:26 > 0:04:31- So is there any other time you yawn? - I yawn when other people yawn.
0:04:31 > 0:04:32Exactly!
0:04:32 > 0:04:37So why don't we put that to the test? OK, guys.
0:04:37 > 0:04:39I want you to watch me as I pretend to yawn.
0:04:46 > 0:04:50Just hearing Nina yawn makes me want to...
0:04:50 > 0:04:52ALL YAWN
0:04:56 > 0:04:57SHE LAUGHS
0:04:57 > 0:05:00It looks like you caught my yawn too, Kyle.
0:05:00 > 0:05:03So sometimes, seeing someone yawn
0:05:03 > 0:05:06or even hearing someone yawn,
0:05:06 > 0:05:07is enough to make us yawn, too.
0:05:07 > 0:05:10Ever tried to stop yourself yawning?
0:05:10 > 0:05:12It's really hard.
0:05:12 > 0:05:16Yawning can sometimes look rude, so we cover up
0:05:16 > 0:05:19and try to stop it. But it's really difficult.
0:05:19 > 0:05:22Yawning is something called a reflex action.
0:05:22 > 0:05:24This means our body does it by itself.
0:05:24 > 0:05:28- What else might you do when you yawn?- Stretching.
0:05:28 > 0:05:32Oh, that's right! So, let's all do some big, lovely stretches.
0:05:32 > 0:05:35Oh!
0:05:35 > 0:05:38Oh, I do love a good stretch. Oh!
0:05:38 > 0:05:40ALL: Wah!
0:05:40 > 0:05:43Well done, guys. That was super stretching.
0:05:43 > 0:05:46We've learned different things make us yawn,
0:05:46 > 0:05:50like feeling tired or bored or seeing someone else yawn.
0:05:50 > 0:05:54Yawning is a reflex action. It's something our bodies do
0:05:54 > 0:05:57all by themselves, whether we want to or not.
0:05:57 > 0:06:02And I know somewhere really wild that might help us find out more.
0:06:02 > 0:06:05- So let's go, experimenters. - ALL: Yeah!
0:06:08 > 0:06:11'Off we go for another adventure.'
0:06:11 > 0:06:13Nina said it was wild.
0:06:13 > 0:06:15Maybe it's the Wild West!
0:06:15 > 0:06:19I've always wanted to be a cowboy! Yee-ha!
0:06:19 > 0:06:24Ho-ho! I don't think so, Bud. The Wild West is a long way away.
0:06:24 > 0:06:28'Listen up, Neurons, we're here. I think I can hear animals.'
0:06:33 > 0:06:36We're at this zoo for a special experiment.
0:06:36 > 0:06:40People catch yawns from each other, like we did in the lab.
0:06:40 > 0:06:44But what about animals? Can animals catch our yawns, too?
0:06:44 > 0:06:49To find out, we're going to try and make lots of different animals yawn.
0:06:49 > 0:06:51So let's get yawning. Come on!
0:07:00 > 0:07:02THEY YAWN
0:07:32 > 0:07:37Wow! Look at the chimps! Ooh-ooh, ah-ah!
0:07:37 > 0:07:39Stop monkeying around, Bud!
0:07:51 > 0:07:53Chimpanzees sometimes yawn
0:07:53 > 0:07:56when they see another chimp yawn,
0:07:56 > 0:07:59but they don't catch yawns from us.
0:07:59 > 0:08:01OK, experimenters. How many animals
0:08:01 > 0:08:04- did you manage to make yawn.- None.
0:08:04 > 0:08:09So this experiment has shown us that although we made each other yawn,
0:08:09 > 0:08:13it seems that animals don't catch our yawns.
0:08:13 > 0:08:16There's only one animal known to yawn
0:08:16 > 0:08:18when it sees a person yawning. A dog.
0:08:18 > 0:08:22Have you heard of the expression, "A dog is a man's best friend"?
0:08:22 > 0:08:26- ALL: Yes, Nina.- Many people believe that their dog knows
0:08:26 > 0:08:28when they're feeling happy or sad.
0:08:28 > 0:08:31And this can even make the dog feel the same way.
0:08:31 > 0:08:34Which gives me an idea for our final experiment.
0:08:34 > 0:08:37- Let's go back to the lab.- ALL: Yeah!
0:08:40 > 0:08:43Before we start, I want to tell you about a funny thing
0:08:43 > 0:08:46that happened to me yesterday.
0:08:46 > 0:08:48I was... I was having this yoghurt...
0:08:48 > 0:08:50SHE LAUGHS
0:08:50 > 0:08:52I was... Ha-ha!
0:08:52 > 0:08:54THEY LAUGH
0:08:56 > 0:08:59Ha-ha-ha! Ho-ho-ho!
0:08:59 > 0:09:01Ah! Oh, dear me!
0:09:01 > 0:09:04Now, I didn't even finish my funny story,
0:09:04 > 0:09:08- so why were you laughing so much? - Because you were laughing.
0:09:08 > 0:09:10Ah-ha, that's right.
0:09:10 > 0:09:14When people around us are laughing, it tends to make us laugh, too.
0:09:14 > 0:09:17We say laughter is infectious.
0:09:17 > 0:09:20That means it spreads from one person to another,
0:09:20 > 0:09:22a bit like a cold.
0:09:22 > 0:09:25Laughter and yawning can both spread from person to person,
0:09:25 > 0:09:29and they're also both ways of talking without words.
0:09:29 > 0:09:32Our final experiment will show you what I mean.
0:09:32 > 0:09:36These cards each have a picture of me on them pulling a face.
0:09:36 > 0:09:40So what do you think I'm saying without words in this picture?
0:09:40 > 0:09:43- OK.- OK.
0:09:43 > 0:09:44That's right.
0:09:44 > 0:09:47Wherever we are in the world, a smiley thumbs up
0:09:47 > 0:09:49says, "Yes," or "OK."
0:09:49 > 0:09:51Jack, would you come over here, please?
0:09:51 > 0:09:55OK, so we'll keep the card hidden from your brothers.
0:09:55 > 0:09:59Copy the face that I'm pulling, and then your brothers
0:09:59 > 0:10:02will try to work out what you're saying.
0:10:02 > 0:10:05OK, so have a look.
0:10:05 > 0:10:08Now, let's see you make that face.
0:10:10 > 0:10:12Um... Angry?
0:10:12 > 0:10:14Well, let's see.
0:10:16 > 0:10:17Yes!
0:10:17 > 0:10:20His face says he is angry. You're not really angry, are you?
0:10:20 > 0:10:22No.
0:10:22 > 0:10:23Good.
0:10:23 > 0:10:25OK, Jack. Thank you very much.
0:10:25 > 0:10:29Kyle, do you want to come over here, dear?
0:10:30 > 0:10:32So let's see you make that face.
0:10:34 > 0:10:36Show your brothers.
0:10:36 > 0:10:39- Happy.- Happy.- Let's see.
0:10:39 > 0:10:40You were right, it is happy.
0:10:40 > 0:10:44I bet that's made you guys feel happy, too.
0:10:44 > 0:10:47Thank you, Kyle. Christopher, up you come.
0:10:47 > 0:10:49OK.
0:10:50 > 0:10:51Go for it!
0:10:53 > 0:10:54Sad?
0:10:54 > 0:10:57Oh, let's see.
0:10:57 > 0:11:01That's right! His face is telling us that he feels sad.
0:11:01 > 0:11:03I don't know about you,
0:11:03 > 0:11:05but seeing his sad face makes me feel a bit sad.
0:11:05 > 0:11:08It's made me feel sad too, Nina.
0:11:08 > 0:11:10Thank you.
0:11:10 > 0:11:14That's one of the really special things about people.
0:11:14 > 0:11:17Our experiment has shown us that we're really good
0:11:17 > 0:11:20at understanding how someone feels
0:11:20 > 0:11:22even when they're talking without words.
0:11:22 > 0:11:25We often start to share that feeling, too.
0:11:25 > 0:11:29Seeing someone look happy or sad makes us feel the same way.
0:11:29 > 0:11:34So if yawning is talking without words, what does it tell people?
0:11:36 > 0:11:38- That you're tired.- Yes.
0:11:38 > 0:11:41Yawning can tell people that I'm tired.
0:11:41 > 0:11:46A long time ago, people talked without words all the time.
0:11:46 > 0:11:49When the leader of a family decided
0:11:49 > 0:11:52it was time for everyone to go to sleep,
0:11:52 > 0:11:54he'd do a big yawn to tell them
0:11:54 > 0:11:57and they'd all yawn back to say they'd understood.
0:12:02 > 0:12:06So your question was, "Why does yawning make other people yawn?"
0:12:06 > 0:12:10We've answered it. We discovered yawning is a reflex action,
0:12:10 > 0:12:13something our body does all by itself.
0:12:13 > 0:12:16It's thought we catch yawns from each other
0:12:16 > 0:12:20because we're good at understanding how each other feels.
0:12:20 > 0:12:25Seeing someone who looks happy or sad can make us feel the same way.
0:12:25 > 0:12:29When we see someone yawn, it makes us feel like yawning, too.
0:12:29 > 0:12:33- I hope that's answered your question.- ALL: Thanks, Nina. Bye!
0:12:33 > 0:12:35Bye!
0:12:39 > 0:12:43If you want to find out more about the science around us,
0:12:43 > 0:12:47go to the Nina section on the CBeebies website. Have fun!
0:12:47 > 0:12:52- Hearts beating.- Lungs breathing. - Fingers feeling.- Mouths eating.
0:12:52 > 0:12:54And don't forget your brain!
0:12:54 > 0:12:57# Brilliant bodies, brilliant bodies
0:12:57 > 0:12:59# Inside and o-o-out
0:12:59 > 0:13:02# Brilliant bodies, brilliant bodies
0:13:02 > 0:13:04# Come on, let's find out about
0:13:04 > 0:13:07# Our handy hands and bendy knees
0:13:07 > 0:13:10# Stretchy backs and noses that sneeze
0:13:10 > 0:13:12# We all have brilliant bodies...
0:13:12 > 0:13:14ALL: Brilliant bodies!
0:13:14 > 0:13:17# Every part has a job to do
0:13:17 > 0:13:20# Even scabs and earwax, too
0:13:20 > 0:13:23# We all have brilliant bodies...
0:13:23 > 0:13:25ALL: Brilliant bodies!
0:13:25 > 0:13:28# Brilliant bodies, brilliant bodies
0:13:28 > 0:13:30# Lashes to protect our eyes
0:13:30 > 0:13:33# Brilliant bodies, brilliant bodies
0:13:33 > 0:13:36# And don't forget to exercise. #
0:13:36 > 0:13:39Oh, I've had a brilliant day.
0:13:39 > 0:13:43I've lost count of all the wicked yawns I've heard.
0:13:43 > 0:13:45I've really enjoyed myself today.
0:13:45 > 0:13:48The zoo was full of exciting smells,
0:13:48 > 0:13:51even if the animals didn't catch our yawns.
0:13:51 > 0:13:54Ah, it's been such a great day, man.
0:13:54 > 0:13:57All that talking without words was brilliant.
0:13:57 > 0:14:00The happy face made me really happy.
0:14:00 > 0:14:02Everyone's body is different,
0:14:02 > 0:14:06but they're all brilliant. See you again soon. Bye!
0:14:06 > 0:14:08ALL: Bye!