1 00:00:09,367 --> 00:00:12,197 So, you're thinking of moving to Mars. 2 00:00:12,197 --> 00:00:15,978 Have you picked out a spot for your new home? 3 00:00:15,978 --> 00:00:19,164 No? Well, I'm here to help. 4 00:00:19,164 --> 00:00:20,488 First things first, 5 00:00:20,488 --> 00:00:23,883 here are some of the things you'll need to bring to The Red Planet: 6 00:00:23,883 --> 00:00:29,320 a high tolerance for cold, loneliness, and radiation; 7 00:00:29,320 --> 00:00:32,938 a lifetime supply of breathable air and food; 8 00:00:32,938 --> 00:00:35,321 a multibillion dollar spaceship; 9 00:00:35,321 --> 00:00:37,927 a desire to just get away from it all; 10 00:00:37,927 --> 00:00:39,367 and water. 11 00:00:39,367 --> 00:00:43,642 You're definitely going to need water. 12 00:00:43,642 --> 00:00:46,182 So what sort of real estate are you looking for? 13 00:00:46,182 --> 00:00:50,051 How about a mansion in the maze-like Noctis Labyrinthus? 14 00:00:50,051 --> 00:00:52,687 A hideaway in the Happy Face Crater? 15 00:00:52,687 --> 00:00:56,225 A fortress on the Face Mesa? 16 00:00:56,225 --> 00:00:57,958 An oceanview? 17 00:00:57,958 --> 00:01:00,788 Uh, bad news on the last one. 18 00:01:00,788 --> 00:01:04,311 You're about 4 billion years late. 19 00:01:04,311 --> 00:01:07,948 We're pretty sure that Mars used to have oceans, lakes, rivers, 20 00:01:07,948 --> 00:01:09,970 the whole package. 21 00:01:09,970 --> 00:01:13,695 But over time, almost all of it froze beneath the surface, 22 00:01:13,695 --> 00:01:16,582 or evaporated off into space. 23 00:01:16,582 --> 00:01:19,182 There's probably still some trapped beneath 24 00:01:19,182 --> 00:01:25,062 the seasonally expanding and contracting carbon dioxide ice caps, though. 25 00:01:25,062 --> 00:01:29,337 So what might Mars look like today if it had surface water? 26 00:01:29,337 --> 00:01:32,131 That, of course, depends on how much we're talking about, 27 00:01:32,131 --> 00:01:34,573 but maybe something like this. 28 00:01:34,573 --> 00:01:39,064 The relatively flat northern hemisphere is below the average elevation, 29 00:01:39,064 --> 00:01:41,666 so it would become one giant ocean, 30 00:01:41,666 --> 00:01:43,562 while the crater-ridden southern hemisphere 31 00:01:43,562 --> 00:01:47,089 would stay mostly high and dry. 32 00:01:47,089 --> 00:01:50,497 That difference between hemispheres is a bit bizarre, 33 00:01:50,497 --> 00:01:52,650 and we don't know why it's like that. 34 00:01:52,650 --> 00:01:55,101 The southern half is probably much older, 35 00:01:55,101 --> 00:01:57,432 judging by features like the number of craters, 36 00:01:57,432 --> 00:02:02,756 and the evidence of increased volcanic activity in the north. 37 00:02:02,756 --> 00:02:04,140 Okay, so who knows? 38 00:02:04,140 --> 00:02:06,842 Maybe one day Mars will have oceans again, 39 00:02:06,842 --> 00:02:11,749 but for now, what we've got is essentially one giant dusty desert. 40 00:02:11,749 --> 00:02:14,611 In fact, it's similar enough to deserts on Earth, 41 00:02:14,611 --> 00:02:19,239 that we've been able to learn a great deal about Mars on our home planet. 42 00:02:19,239 --> 00:02:22,321 For instance, Martian sand dunes form and behave 43 00:02:22,321 --> 00:02:24,663 similarly to our sand dunes, 44 00:02:24,663 --> 00:02:28,007 though the Martian versions often grow twice as large 45 00:02:28,007 --> 00:02:33,306 thanks to a gravitational pull that's about a third as strong as ours. 46 00:02:33,306 --> 00:02:36,227 And Mars has some features you won't see on Earth, 47 00:02:36,227 --> 00:02:41,363 like tars, which are crestless sand dunes up to fifteen meters tall, 48 00:02:41,363 --> 00:02:44,803 whose formations we have yet to understand. 49 00:02:44,803 --> 00:02:46,057 You're probably wondering, 50 00:02:46,057 --> 00:02:48,819 "What do you get when you combine a planet-wide desert 51 00:02:48,819 --> 00:02:51,064 with an atmosphere that, like ours, 52 00:02:51,064 --> 00:02:56,493 is subject to wind-generating pressure differentials, dust storms?" 53 00:02:56,493 --> 00:02:59,422 These will be your main weather hazards on the Red Planet. 54 00:02:59,422 --> 00:03:02,240 They play a large part in making the planet red 55 00:03:02,240 --> 00:03:07,644 by distributing rusted iron particles across the surface and into the air. 56 00:03:07,644 --> 00:03:09,920 Thanks to the low gravity and lack of moisture, 57 00:03:09,920 --> 00:03:14,964 these dust storms can last for months and cover the planet. 58 00:03:14,964 --> 00:03:19,779 So, you might want to build your home as high as possible. 59 00:03:19,779 --> 00:03:21,481 Well, look no further. 60 00:03:21,481 --> 00:03:27,195 This is Olympus Mons, the largest volcano in the Solar System. 61 00:03:27,195 --> 00:03:29,323 Even if Mars had a breathable atmosphere, 62 00:03:29,323 --> 00:03:34,556 you'd find the views from the 25 kilometer summit breathtaking. 63 00:03:34,556 --> 00:03:36,163 Or are volcanos not your thing? 64 00:03:36,163 --> 00:03:41,919 Then how about Valles Marineris, the largest canyon in the Solar System? 65 00:03:41,919 --> 00:03:44,061 It's so wide that from one side, 66 00:03:44,061 --> 00:03:48,182 the opposite rim would be below the curve of the horizon. 67 00:03:48,182 --> 00:03:53,694 Still, you'll catch some spectacular blue sunsets in the normally red sky, 68 00:03:53,694 --> 00:03:57,136 which gets its color from the dust absorbing most of the blue light, 69 00:03:57,136 --> 00:04:01,630 and the way sunlight is scattered by the atmosphere. 70 00:04:01,630 --> 00:04:06,482 Have you got spirit, curiosity, or are you just looking for opportunity? 71 00:04:06,482 --> 00:04:10,908 Then stop stalling and make the move to Mars today. 72 00:04:10,908 --> 00:04:14,215 Mars: Redder than Ever.