Watch Scott Manley Build and Fly the Interplanetary Transport Ship in Kerbal

When SpaceX CEO Elon Musk took to the stage at the International Astronautical Congress in Mexico on Monday, he announced his bold vision to send humanity into the Solar System, he laid out one of the most elaborate and ambitious projects ever put forward in the field of human space exploration. Like many of you, I watched his announcement slack jawed at the implications. My first thought? A spaceship capable of carrying 100 humans from Earth to Mars with a reusable main stage? Uh, that's ambiti...