1 00:00:09,367 --> 00:00:12,197 So, you're thinking of moving to Mars. 2 00:00:12,197 --> 00:00:12,618 Have you picked out a spot for your new home? 3 99:59:59,999 --> 99:59:59,999 No? Well, I'm here to help. 4 99:59:59,999 --> 99:59:59,999 First things first, 5 99:59:59,999 --> 99:59:59,999 here are some of the things you'll need to bring to The Red Planet: 6 99:59:59,999 --> 99:59:59,999 a high tolerance for cold, loneliness, and radiation, 7 99:59:59,999 --> 99:59:59,999 a lifetime supply of breathable air and food, 8 99:59:59,999 --> 99:59:59,999 a multibillion dollar spaceship, 9 99:59:59,999 --> 99:59:59,999 a desire to just get away from it all, 10 99:59:59,999 --> 99:59:59,999 and water. 11 99:59:59,999 --> 99:59:59,999 You're definitely going to need water. 12 99:59:59,999 --> 99:59:59,999 So what sort of real estate are you looking for? 13 99:59:59,999 --> 99:59:59,999 How about a mansion in the maze-like Noctis Labyrinthus? 14 99:59:59,999 --> 99:59:59,999 A hide away in the Happy Face Crater? 15 99:59:59,999 --> 99:59:59,999 A fortress on the Face Mesa? 16 99:59:59,999 --> 99:59:59,999 An oceanview? 17 99:59:59,999 --> 99:59:59,999 Uh, bad news on the last one. 18 99:59:59,999 --> 99:59:59,999 You're about 4 billion years late. 19 99:59:59,999 --> 99:59:59,999 We're pretty sure that Mars used to have oceans, lakes, rivers, 20 99:59:59,999 --> 99:59:59,999 the whole package. 21 99:59:59,999 --> 99:59:59,999 But over time, almost all of it froze beneath the surface, 22 99:59:59,999 --> 99:59:59,999 or evaporated off into space. 23 99:59:59,999 --> 99:59:59,999 There's probably still some trapped beneath 24 99:59:59,999 --> 99:59:59,999 the seasonally expanding and contracting carbon dioxide ice caps, though. 25 99:59:59,999 --> 99:59:59,999 So what might Mars look like today if it had surface water? 26 99:59:59,999 --> 99:59:59,999 That of course depends on how much we're talking about, 27 99:59:59,999 --> 99:59:59,999 but maybe something like this. 28 99:59:59,999 --> 99:59:59,999 The relatively flat northern hemisphere is below the average elevation, 29 99:59:59,999 --> 99:59:59,999 so it would become one giant ocean, 30 99:59:59,999 --> 99:59:59,999 while the crater-ridden southern hemisphere 31 99:59:59,999 --> 99:59:59,999 would stay mostly high and dry. 32 99:59:59,999 --> 99:59:59,999 That difference between hemispheres is a bit bizarre, 33 99:59:59,999 --> 99:59:59,999 and we don't know why it's like that. 34 99:59:59,999 --> 99:59:59,999 The southern half is probably much older, 35 99:59:59,999 --> 99:59:59,999 judging by features like the number of craters, 36 99:59:59,999 --> 99:59:59,999 and the evidence of increased volcanic activity in the north. 37 99:59:59,999 --> 99:59:59,999 Okay, so who knows. 38 99:59:59,999 --> 99:59:59,999 Maybe one day Mars will have oceans again, 39 99:59:59,999 --> 99:59:59,999 but for now, what we've got is essentially one giant dusty desert. 40 99:59:59,999 --> 99:59:59,999 In fact, it's similar enough to deserts on Earth, 41 99:59:59,999 --> 99:59:59,999 that we've been able to learn a great deal about Mars on our home planet. 42 99:59:59,999 --> 99:59:59,999 For instance, Maritan sand dunes form and behave 43 99:59:59,999 --> 99:59:59,999 similarly to our sand dunes, 44 99:59:59,999 --> 99:59:59,999 though the Martian versions often grow twice as large 45 99:59:59,999 --> 99:59:59,999 thanks to a gravitational pull that's about a third as strong as ours. 46 99:59:59,999 --> 99:59:59,999 And Mars has some features you won't see on Earth, 47 99:59:59,999 --> 99:59:59,999 like tars, which are crestless sand dunes up to fifteen meters tall, 48 99:59:59,999 --> 99:59:59,999 whose formations we have yet to understand. 49 99:59:59,999 --> 99:59:59,999 You're probably wondering, 50 99:59:59,999 --> 99:59:59,999 "What do you get when you combine a planet-wide desert 51 99:59:59,999 --> 99:59:59,999 with an atmosphere, like ours, 52 99:59:59,999 --> 99:59:59,999 is subject to wind-generating pressure differentials, dust storms?" 53 99:59:59,999 --> 99:59:59,999 These will be your main weather hazards on the Red Planet. 54 99:59:59,999 --> 99:59:59,999 They play a large part in making the planet red 55 99:59:59,999 --> 99:59:59,999 by distributing rusted iron particles across the surface and into the air. 56 99:59:59,999 --> 99:59:59,999 Thanks to the low gravity and lack of moisture, 57 99:59:59,999 --> 99:59:59,999 these dust storms can last for months and cover the planet. 58 99:59:59,999 --> 99:59:59,999 So, you might want to build your home as high as possible. 59 99:59:59,999 --> 99:59:59,999 Well, look no further. 60 99:59:59,999 --> 99:59:59,999 This is Olympus Mons, the largest volcano in the Solar System. 61 99:59:59,999 --> 99:59:59,999 Even if Mars had a breathable atmosphere, 62 99:59:59,999 --> 99:59:59,999 you'd find the views from the 25 kilometer summit breathtaking. 63 99:59:59,999 --> 99:59:59,999 Or are volcanos not your thing? 64 99:59:59,999 --> 99:59:59,999 Then how about Valles Marineris, the largest canyon in the Solar System? 65 99:59:59,999 --> 99:59:59,999 It's so wide that from one side, 66 99:59:59,999 --> 99:59:59,999 the opposite rim would be below the curve of the horizon. 67 99:59:59,999 --> 99:59:59,999 Still, you catch som spectacular blue sunsets in the normally red sky, 68 99:59:59,999 --> 99:59:59,999 which gets its color from the dust absorbing most of the blue light, 69 99:59:59,999 --> 99:59:59,999 and the way sunlight is scattered by the atmosphere. 70 99:59:59,999 --> 99:59:59,999 Have you got spirit, curiosity, or are you just looking for opportunity? 71 99:59:59,999 --> 99:59:59,999 Then stop stalling and make the move to Mars today. 72 99:59:59,999 --> 99:59:59,999 Mars: Redder than Ever.