Former President Barack Obama said he did not see evidence that aliens "have made contact with us," after sending social media abuzz by saying aliens were real on a podcast over the weekend.

Sky News host Caleb Bond has commented on former US president Barack Obama’s comment about aliens after he appeared to suggest they exist in a recent interview.

"But the distances between solar systems are so great that the chances we’ve been visited by aliens is low, and I saw no evidence during my presidency that extraterrestrials have made contact with us....