Space object that passed Earth was likely from alien world, says Harvard professor

In 2017, the space rock that became known as 'Oumuamua', made headlines when it entered our solar system and rapidly flew past Earth.

At the time, the cigar-shaped interstellar object sparked much speculation as to its origins, with a number of scientists suggesting it may even have been created by aliens.

Now a Harvard professor is doubling down on the alien claims in his new book, forwarding a theory that the rock provides proof of intelligent life beyond out solar system.

Find out more in the video above.