How and when will humans get to Mars?

2016-07-22 456 Dailymotion

Jim Green, head of NASA's planetary science division, answers your questions about human travel to Mars.

Related Videos

Humans have changed turkeys more than you may realize

Watch D.C.'s dogs try their hardest to convince grumpy humans snow is fun

'Phelps vs. Shark' was simulated. Here are 4 times humans actually raced animals.

Pruitt: There should be more 'open and civil discourse' on humans impact on climate change

Why these researchers think humans came to North America 130,000 years ago

Dear Science: Why aren't chimpanzees evolving into humans?

Space travel is causing visual impairment for some astronauts. Will this prevent travel to Mars?

The Fix: What will happen when the GOP controls Congress and the White House?

The Fix: When will we know the winner of the presidential election?

When will Porter play?