0:00:09.367,0:00:12.197 So, you're thinking of moving to Mars. 0:00:12.197,0:00:12.618 Have you picked out a spot [br]for your new home? 9:59:59.000,9:59:59.000 No? Well, I'm here to help. 9:59:59.000,9:59:59.000 First things first, 9:59:59.000,9:59:59.000 here are some of the things[br]you'll need to bring to The Red Planet: 9:59:59.000,9:59:59.000 a high tolerance for cold, [br]loneliness, and radiation, 9:59:59.000,9:59:59.000 a lifetime supply [br]of breathable air and food, 9:59:59.000,9:59:59.000 a multibillion dollar spaceship, 9:59:59.000,9:59:59.000 a desire to just get away from it all, 9:59:59.000,9:59:59.000 and water. 9:59:59.000,9:59:59.000 You're definitely going to need water. 9:59:59.000,9:59:59.000 So what sort of real estate[br]are you looking for? 9:59:59.000,9:59:59.000 How about a mansion in the maze-like[br]Noctis Labyrinthus? 9:59:59.000,9:59:59.000 A hide away in the Happy Face Crater? 9:59:59.000,9:59:59.000 A fortress on the Face Mesa? 9:59:59.000,9:59:59.000 An oceanview? 9:59:59.000,9:59:59.000 Uh, bad news on the last one. 9:59:59.000,9:59:59.000 You're about 4 billion years late. 9:59:59.000,9:59:59.000 We're pretty sure that Mars[br]used to have oceans, lakes, rivers, 9:59:59.000,9:59:59.000 the whole package. 9:59:59.000,9:59:59.000 But over time, almost all of it[br]froze beneath the surface, 9:59:59.000,9:59:59.000 or evaporated off into space. 9:59:59.000,9:59:59.000 There's probably still some[br]trapped beneath 9:59:59.000,9:59:59.000 the seasonally expanding and contracting[br]carbon dioxide ice caps, though. 9:59:59.000,9:59:59.000 So what might Mars look like today[br]if it had surface water? 9:59:59.000,9:59:59.000 That of course depends[br]on how much we're talking about, 9:59:59.000,9:59:59.000 but maybe something like this. 9:59:59.000,9:59:59.000 The relatively flat northern hemisphere[br]is below the average elevation, 9:59:59.000,9:59:59.000 so it would become one giant ocean, 9:59:59.000,9:59:59.000 while the crater-ridden [br]southern hemisphere 9:59:59.000,9:59:59.000 would stay mostly high and dry. 9:59:59.000,9:59:59.000 That difference between hemispheres[br]is a bit bizarre, 9:59:59.000,9:59:59.000 and we don't know why it's like that. 9:59:59.000,9:59:59.000 The southern half is probably[br]much older, 9:59:59.000,9:59:59.000 judging by features [br]like the number of craters, 9:59:59.000,9:59:59.000 and the evidence of increased[br]volcanic activity in the north. 9:59:59.000,9:59:59.000 Okay, so who knows. 9:59:59.000,9:59:59.000 Maybe one day Mars will have oceans again, 9:59:59.000,9:59:59.000 but for now, what we've got is essentially[br]one giant dusty desert. 9:59:59.000,9:59:59.000 In fact, it's similar enough [br]to deserts on Earth, 9:59:59.000,9:59:59.000 that we've been able to learn a great deal[br]about Mars on our home planet. 9:59:59.000,9:59:59.000 For instance, Maritan sand dunes[br]form and behave 9:59:59.000,9:59:59.000 similarly to our sand dunes, 9:59:59.000,9:59:59.000 though the Martian versions [br]often grow twice as large 9:59:59.000,9:59:59.000 thanks to a gravitational pull[br]that's about a third as strong as ours. 9:59:59.000,9:59:59.000 And Mars has some features[br]you won't see on Earth, 9:59:59.000,9:59:59.000 like tars, which are crestless[br]sand dunes up to fifteen meters tall, 9:59:59.000,9:59:59.000 whose formations [br]we have yet to understand. 9:59:59.000,9:59:59.000 You're probably wondering, 9:59:59.000,9:59:59.000 "What do you get when you[br]combine a planet-wide desert 9:59:59.000,9:59:59.000 with an atmosphere, like ours, 9:59:59.000,9:59:59.000 is subject to wind-generating[br]pressure differentials, dust storms?" 9:59:59.000,9:59:59.000 These will be your main weather hazards[br]on the Red Planet. 9:59:59.000,9:59:59.000 They play a large part [br]in making the planet red 9:59:59.000,9:59:59.000 by distributing rusted iron particles[br]across the surface and into the air. 9:59:59.000,9:59:59.000 Thanks to the low gravity[br]and lack of moisture, 9:59:59.000,9:59:59.000 these dust storms can last for months[br]and cover the planet. 9:59:59.000,9:59:59.000 So, you might want to build your home[br]as high as possible. 9:59:59.000,9:59:59.000 Well, look no further. 9:59:59.000,9:59:59.000 This is Olympus Mons,[br]the largest volcano in the Solar System. 9:59:59.000,9:59:59.000 Even if Mars had a breathable atmosphere, 9:59:59.000,9:59:59.000 you'd find the views from [br]the 25 kilometer summit breathtaking. 9:59:59.000,9:59:59.000 Or are volcanos not your thing? 9:59:59.000,9:59:59.000 Then how about Valles Marineris,[br]the largest canyon in the Solar System? 9:59:59.000,9:59:59.000 It's so wide that from one side, 9:59:59.000,9:59:59.000 the opposite rim would be below[br]the curve of the horizon. 9:59:59.000,9:59:59.000 Still, you catch som spectacular[br]blue sunsets in the normally red sky, 9:59:59.000,9:59:59.000 which gets its color from the dust[br]absorbing most of the blue light, 9:59:59.000,9:59:59.000 and the way sunlight is scattered[br]by the atmosphere. 9:59:59.000,9:59:59.000 Have you got spirit, curiosity,[br]or are you just looking for opportunity? 9:59:59.000,9:59:59.000 Then stop stalling[br]and make the move to Mars today. 9:59:59.000,9:59:59.000 Mars: Redder than Ever.