0:00:02 > 0:00:03BELL RINGS
0:00:03 > 0:00:06Oh, Jonathan, I'm so nervous about my first time on TV!
0:00:06 > 0:00:07I'm not sure I'm ready.
0:00:07 > 0:00:09You'll be fine, Miss Hucklebuck.
0:00:09 > 0:00:11It's all here in the notes.
0:00:11 > 0:00:13Oh, and by the way, the name's...
0:00:13 > 0:00:14THEY SCREAM
0:00:14 > 0:00:18Morning, Colin! It's almost 5am here in Mongolia.
0:00:18 > 0:00:21It's freezing cold, but I'm ready to go.
0:00:21 > 0:00:25And it's almost 6pm here in sunny Rio and I'm ready to party!
0:00:25 > 0:00:27Hey, hey!
0:00:29 > 0:00:30BELL RINGS
0:00:30 > 0:00:32- Jonathan! My notes! - Break a leg, Miss Hucklebuck.
0:00:32 > 0:00:34Whoop! CRASH!
0:00:34 > 0:00:36I think maybe I just did!
0:00:36 > 0:00:37This is...
0:00:39 > 0:00:41..with...
0:00:45 > 0:00:48..Colin the floor manager and...
0:00:50 > 0:00:51Stand by!
0:00:52 > 0:00:54Come on, everybody!
0:00:54 > 0:00:57- DR KNOWLES:- Welcome to Brain Freeze: Time Zone Special.
0:00:57 > 0:00:59It's time for...
0:01:01 > 0:01:03Today, we're asking...
0:01:04 > 0:01:05You, um...
0:01:05 > 0:01:06Oh.
0:01:06 > 0:01:08Today we're asking...
0:01:10 > 0:01:12The Earth spins on its axis
0:01:12 > 0:01:13once every 24 hours,
0:01:13 > 0:01:15which gives us day and night.
0:01:15 > 0:01:17Before there were mechanical clocks,
0:01:17 > 0:01:19time was measured mostly using the sun.
0:01:19 > 0:01:22When the sun was at its highest point, we called that noon,
0:01:22 > 0:01:25but as the world became more connected, there was a need
0:01:25 > 0:01:28for a more universal system of time measurement.
0:01:28 > 0:01:29MCCORK: So what did they do?
0:01:29 > 0:01:32The solution was the standard time zone system -
0:01:32 > 0:01:36a series of imaginary lines dividing the Earth into 24 zones,
0:01:36 > 0:01:38each an hour apart.
0:01:38 > 0:01:40So when it's night-time here in Rio...
0:01:40 > 0:01:43..it's morning time here in Mongolia.
0:01:43 > 0:01:45Wait! I've got this one.
0:01:45 > 0:01:46SHE CLEARS HER THROAT
0:01:46 > 0:01:49See you after the break!
0:01:50 > 0:01:51And we're clear!
0:01:51 > 0:01:53Oh, that was a disaster.
0:01:53 > 0:01:55I just know I can do better!
0:01:55 > 0:01:57Here are your notes for part two.
0:01:57 > 0:01:59Please be extremely careful.
0:01:59 > 0:02:00Hey, hey!
0:02:00 > 0:02:02No, not again!
0:02:02 > 0:02:06Hey, Colin, thanks for sending me to Rio. This is the best fun ever!
0:02:06 > 0:02:08I'm even learning how to do the limbo.
0:02:08 > 0:02:11Professor, you do realise you're supposed to be doing
0:02:11 > 0:02:13actual science work, don't you?
0:02:13 > 0:02:14Well, I'm working on my suntan.
0:02:14 > 0:02:16That's kind of science, isn't it? Ha!
0:02:16 > 0:02:18- BELL RINGS - Ah!
0:02:18 > 0:02:20Oh, crumpets, we're going live!
0:02:20 > 0:02:23But what will I do without my notes, Jonathan?
0:02:23 > 0:02:25You'll just have to wing it, Miss Hucklebuck.
0:02:25 > 0:02:27And for the last time, the name's Colin!
0:02:32 > 0:02:36'You can do this. You are a star.
0:02:36 > 0:02:38'This is your destiny.
0:02:38 > 0:02:40'Take it by the horns!'
0:02:40 > 0:02:43- Welcome back, Brain Freezers. - Oh!
0:02:43 > 0:02:47So, Dr Knowles, why does the Earth spin on its axis?
0:02:47 > 0:02:48Oh, er...
0:02:48 > 0:02:50Before there were planets in our solar system,
0:02:50 > 0:02:54there was a spinning nebulous cloud of dust with our sun at the centre.
0:02:54 > 0:02:57Over time, these particles began to stick together
0:02:57 > 0:03:02and eventually formed planets, which inherited this spinning momentum.
0:03:02 > 0:03:03So, you could say
0:03:03 > 0:03:04the Earth keeps spinning
0:03:04 > 0:03:07because there's nothing there to stop it, right?
0:03:07 > 0:03:10Exactly! Just as Newton's first law of motion states...
0:03:10 > 0:03:13"An object will remain in whatever state of motion it is in,
0:03:13 > 0:03:16"unless another force acts upon it."
0:03:16 > 0:03:19I couldn't have said it better myself!
0:03:19 > 0:03:21So it's goodbye from me in Mongolia...
0:03:21 > 0:03:22..from me in Rio...
0:03:22 > 0:03:24..and from me in Brain Freeze studios.
0:03:24 > 0:03:26Goodbye.
0:03:26 > 0:03:28And we're clear!
0:03:28 > 0:03:32Right, McCork, I expect you back here first thing Monday morning.
0:03:32 > 0:03:34That's GMT, remember.
0:03:34 > 0:03:37The thing is, Colin, I've just qualified for the finals
0:03:37 > 0:03:39of the limbo, so I might just stay here a bit longer,
0:03:39 > 0:03:40if that's all right.
0:03:40 > 0:03:43Oh, the joys of being a floor manager.
0:03:43 > 0:03:47Well, I'm happy to help out whenever you need it, Colin.
0:03:47 > 0:03:49Did...did you just call me...?
0:03:49 > 0:03:51No, I don't think so...
0:03:51 > 0:03:53- Jonathan. - SHE GIGGLES
0:03:53 > 0:03:55Aw, crumpets!
0:03:55 > 0:03:56Argh!
0:04:08 > 0:04:09Brain Freeze.