0:17:50 > 0:17:57.
0:18:02 > 0:18:04BELL RINGS
0:18:04 > 0:18:08According to this, we've mapped more of the surface of Mars than
0:18:08 > 0:18:11the bottom of the Earth's oceans. Isn't that amazing?
0:18:11 > 0:18:14That is fascinating, Dr Knowles.
0:18:14 > 0:18:17Er, what's going on, Colin? You seem VERY relaxed.
0:18:17 > 0:18:20It's part of my new healthy regime.
0:18:20 > 0:18:23No more stress for me, no matter what stunt McCork pulls.
0:18:23 > 0:18:25Sorry I'm late, Colin.
0:18:25 > 0:18:28My car broke down and my dog got sick and I fell in a hole...
0:18:28 > 0:18:31Not to worry, McCork. Take your place when you're ready.
0:18:31 > 0:18:33We're going live shortly.
0:18:33 > 0:18:35What's up with your man?
0:18:35 > 0:18:38This is Brain Freeze...
0:18:38 > 0:18:40with Dr Knowles...
0:18:40 > 0:18:44Professor McCork...
0:18:44 > 0:18:48and Colin the floor manager.
0:18:48 > 0:18:50Stand by!
0:18:58 > 0:19:00Hi and welcome to Brain Freeze.
0:19:00 > 0:19:01It's time to reveal...
0:19:04 > 0:19:05Today we ask...
0:19:07 > 0:19:10How deep is the ocean? That's a Justin Bieber song, isn't it?
0:19:10 > 0:19:13The deep sea is the lowest layer of the ocean
0:19:13 > 0:19:16and includes anything below 200 metres
0:19:16 > 0:19:18right down to over ten kilometres.
0:19:18 > 0:19:21And the deep sea is one of the largest habitats
0:19:21 > 0:19:23for living creatures on the planet. That's a fact.
0:19:23 > 0:19:28Now, since the 1960s, scientists have discovered some incredible creatures
0:19:28 > 0:19:31that have adapted to the darkness and high pressure of the deep sea.
0:19:31 > 0:19:32Creatures.
0:19:32 > 0:19:34What kind of creatures?
0:19:34 > 0:19:36There's the flashlight fish and the angler fish,
0:19:36 > 0:19:39who have evolved their own system of lighting...
0:19:39 > 0:19:41FISH ROARS, HE SCREAMS
0:19:41 > 0:19:44The fangtooth fish, which has been found at depths near 5,000 metres
0:19:44 > 0:19:47and has the largest teeth of any fish relative to its size.
0:19:47 > 0:19:50Amazing. I wonder if he'd be tasty with a bag of chips.
0:19:51 > 0:19:53HE SCREAMS
0:19:53 > 0:19:56And these sea cucumbers, also known as sea pigs.
0:19:56 > 0:19:58Well, they're just really well-adapted
0:19:58 > 0:19:59to living under pressure.
0:19:59 > 0:20:03Speaking of pigs under pressure, I'm off to see what Colin's doing.
0:20:03 > 0:20:05But, Professor, we're live!
0:20:05 > 0:20:07So unprofessional!
0:20:07 > 0:20:09SHE CLEARS HER THROAT Back after this break.
0:20:13 > 0:20:15Colin? Hey, Colin, Colin?
0:20:15 > 0:20:17Ah, where's he gone?
0:20:19 > 0:20:21Channel all negative thoughts outward
0:20:21 > 0:20:23and embrace your inner butterfly.
0:20:25 > 0:20:29Sorry, Colin. Just to let you know we're taking a break now, OK?
0:20:30 > 0:20:34Ignoring all other distractions that may be present...
0:20:34 > 0:20:36Oh, and, Colin, Dr Knowles was wondering
0:20:36 > 0:20:39if you wanted anything down the shop.
0:20:39 > 0:20:43..we are now in an unbreakable state of calm.
0:20:43 > 0:20:47One last thing, Colin - did I show you my new pogo stick?
0:20:47 > 0:20:49Oh, McCork, you've ruined it!
0:20:49 > 0:20:52How am I supposed to relax when you keep interrupting me?!
0:20:52 > 0:20:54Yeah, yeah, yeah. It's like it's got a life of its own!
0:20:54 > 0:20:57Oh, crumpets! Get back to work, McCork.
0:20:57 > 0:20:59We're going live.
0:21:00 > 0:21:02Welcome back.
0:21:02 > 0:21:04Megan just got in touch to say, "Will you please hurry up
0:21:04 > 0:21:06"and tell us where the deepest part of the ocean is?"
0:21:06 > 0:21:08That means it's time for...
0:21:11 > 0:21:13At almost 11 kilometres deep,
0:21:13 > 0:21:17the Mariana Trench in the Pacific Ocean is the deepest known part.
0:21:17 > 0:21:21- To be specific.- No, no, Pacific. - Yeah, I was being specific.
0:21:21 > 0:21:24To give you an idea of how deep that is, this huge trench is
0:21:24 > 0:21:28a full 2,000 metres deeper than Mount Everest is tall.
0:21:28 > 0:21:29Tell me, Doctor,
0:21:29 > 0:21:31how does the pressure change being down that deep?
0:21:31 > 0:21:35Pressure in the ocean increases at about one atmosphere for every
0:21:35 > 0:21:36ten metres of depth.
0:21:36 > 0:21:39So the pressure at the bottom would be like trying to
0:21:39 > 0:21:41carry around 50 jumbo jets.
0:21:41 > 0:21:43Whoa! Now that's real pressure.
0:21:43 > 0:21:47That's all for today, folks. See you next time on Brain Freeze.
0:21:48 > 0:21:51Clear, and that's a wrap.
0:21:52 > 0:21:55Yes, of course, boss. No dangerous equipment on set.
0:21:55 > 0:21:56Yeah, including pogo sticks.
0:21:56 > 0:22:00Ah, isn't it great to see him back to his old self again, Dr Knowles?
0:22:00 > 0:22:03Yeah. I don't know what he'd do without you, Professor(!)
0:22:03 > 0:22:07Hup! Anyway, I'm off home. See you later.