Former U.S. 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.

Former U.S. President Barack Obama says he did not see evidence that aliens “have made contact with us,” after lighting up social media by saying aliens were real on a podcast over the weekend.

The Kardashev Scale ranks civilizations by how much energy they can control, from planetary to galactic and beyond. As the scale rises, technology begins to resemble something closer to gods than ...