U.S. President Barack Obama on Monday ribbed scientists behind NASA's roving robot Curiosity, instructing them to let him know right away if they found life on Mars."If in fact, you do make contact with Martians, please let me know right away," Obama joked, as he called the scientists at NASA's Jet Propulsion Laboratory in California from Air Force One.
"I've got a lot of other things on my plate, but I suspect that that will go to the top of the list. Even if they're just microbes, it will be pretty exciting."