Read More: Space.com
In case you were wondering, there's no evidence that Mars hosted an alien civilization thousands of years ago. Nonetheless, Rep. Dana Rohrabacher, R-Calif., asked a panel of planetary scientists to speculate about this possibility today (July 18), during a hearing of the U.S. House of Representatives' Committee on Science, Space and Technology's Space Subcommittee. The inquiry followed testimony by panelist Ken Farley, the project scientist for NASA's Mars 2020 rover mission, stating that the Red Planet had lakes and rivers, and perhaps even a huge northern ocean, until about 3.6 billion years ago. So it fell to Farley to answer the question of whether Mars was perhaps once home to intelligent aliens. "So, the evidence is that Mars was different billions of years ago, not thousands of years ago, and there is no evidence I'm aware of that — " Farley began. "Would you rule that out?"' Rohrabacher interjected. "I would say that is extremely unlikely," Farley responded.