This afternoon, in glorious detail, Elon Musk described his plan to send people to colonize Mars with his company SpaceX, the interplanetary transport startup he founded in 2002. More than 100,000 people watched online as the entrepreneur spoke on stage at the International Astronautical Congress in Guadalajara, Mexico. Musk described how Martian colonization would work. The ship he proposes to transport humans to the Red Planet is huge –– 12 meters in diameter and 122 meters tall. It’s supposed to carry at least 100 people, have restaurants, a cinema, you name it. But there was one critical question he practically ... (full story)