The universe is 14 billion years old. What started as a massive explosion all those eons ago has since turned into a raging void filled with stars, planets, black holes, and the dark matter in between. But if the cosmos is so vastly ancient, then where are all the aliens?
Many scientists and experts have proposed reasons why this might be the case, but one of the most enduring is the Fermi paradox. What is it? And how does it explain the lack of extraterrestrial life? Click on to find out.