Curiosity is the great motivator for scientists, but one expert believes it might be best if they fought their urges before contacting aliens. An advanced species of extraterrestrials could easily view humans as primitive or a nuisance and wipe us out accordingly, Jacco van Loon, astrophysicist and director of Keele Observatory at Keele University, warned.
Life on Earth is a newcomer in comparison to the age of the Universe.
The first signs of life on our planet appeared around 3.5 billion years ago ... Read even more
