Neil deGrasse Tyson
Prestigious astrophysicist claimed to believe in the mathematical probability of other life in the universe but says no evidence found yet.
Well-known astrophysicist and author, Neil deGrasse Tyson, reckoned, "If our solar system is not unusual, then there are so many planets in the universe that, for example, they outnumber the sum of all sounds and words ever uttered by every human who has ever lived. To declare that Earth must be the only planet with life in the universe would be inexcusably bigheaded of us."
Although Tyson said he believed in the probability of life outside of Earth, he was hesitant to support the idea that other forms of intelligent life have visited our planet.