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Welcome to Science Fiction, | 0:09:04 | 0:09:05 | |
the show that awakens the inner scientist in all of us. | 0:09:05 | 0:09:08 | |
I think there's a couple inside me. | 0:09:08 | 0:09:11 | |
I could start charging rent! | 0:09:11 | 0:09:12 | |
Body, body, on the wall, what's going on at all, at all? | 0:09:12 | 0:09:16 | |
Today's question is from Joanna in Havana. | 0:09:16 | 0:09:19 | |
Is yawning contagious? | 0:09:19 | 0:09:21 | |
A yawn is a involuntary inhalation and exhalation of air | 0:09:21 | 0:09:24 | |
caused by the contraction of the diaphragm in the lower abdomen. | 0:09:24 | 0:09:27 | |
And it also involves making a stupid face like this. | 0:09:27 | 0:09:31 | |
Yaaaaaawwwwwnnn! | 0:09:31 | 0:09:33 | |
We usually yawn when we're tired, | 0:09:33 | 0:09:36 | |
when we're bored or when our brain isn't getting enough oxygen. | 0:09:36 | 0:09:39 | |
On the plus side, yawns are brilliant for catching flies. | 0:09:39 | 0:09:41 | |
Yaaaaawwn... Gulp! | 0:09:41 | 0:09:43 | |
But why is it that if one person yawns, others will soon follow? | 0:09:43 | 0:09:47 | |
Dr Knowles, it's contagious. | 0:09:47 | 0:09:49 | |
Half the people at home are yawning already. | 0:09:49 | 0:09:52 | |
Like laughing, contagious yawning | 0:09:52 | 0:09:54 | |
is more likely with friends or family. | 0:09:54 | 0:09:56 | |
So scientists believe it might be linked to empathy. | 0:09:56 | 0:09:59 | |
Em... Empathy? Who's she? | 0:09:59 | 0:10:01 | |
You know, empathy. | 0:10:01 | 0:10:02 | |
Understanding how someone else is feeling | 0:10:02 | 0:10:05 | |
by putting yourself in their shoes. | 0:10:05 | 0:10:07 | |
Dr Knowles, wearing someone else's shoes - | 0:10:07 | 0:10:09 | |
that's disgusting! SQUELCHING | 0:10:09 | 0:10:12 | |
So, Joanna, we can safely say that yawning is contagious. | 0:10:12 | 0:10:15 | |
Yaaaawwwnnn... And if anyone tells you otherwise, | 0:10:15 | 0:10:17 | |
that's just a load of old... HE SNORES | 0:10:17 | 0:10:20 | |
# Science Fiction! # | 0:10:20 | 0:10:23 | |
Ahem. Professor? Can you at least stay awake until the show is over? | 0:10:23 | 0:10:29 | |
(HE MUMBLES INCOHERENTLY) | 0:10:29 | 0:10:33 | |
-What...? Who are YOU? -Grrr! | 0:10:33 | 0:10:35 |