Aspiring teenage astronauts reveal that a journey to Mars is closer than you think.
Bill Nye
Self
Jeffrey Kluger
Neil deGrasse Tyson
Michio Kaku
Bobak Ferdowsi
Andy Weir
Tim Urban
Elon Musk
2017 • 6.0 ★
1996 • 7.0 ★
2011 • 6.1 ★
2016 • 7.0 ★
2009 • 5.3 ★
