After setting social media abuzz by saying on a podcast over the weekend that aliens were real, former President Barack Obama said he didn't see evidence that aliens "have made contact with us."

The former US president sparked global debate after a podcast remark suggesting extraterrestrial life likely exists.

"I was trying to stick with the spirit of the speed round, but since it's gotten attention let me clarify. Statistically, the universe is so vast that the odds are good there's life out there. But the...