Grizzly Bears from Outer Space

A region of space barely a thousandth of a square degree on the sky contains a whopping 5,500 galaxies. Making the probability that there exists at least one planet that could support life pretty tantalizing. What might that life form look like? Robert and Joe discuss cosmologist Fergus Simpson's statistical argument that an extraterrestrial could weigh in at 660 pounds. My friend, can your heart stand the shocking facts of grizzly bears from outer space?

Grizzly Bears from Outer Space

Image Credit: SensorSpot/Digital Vision Vectors/Getty

Related Content:

10 Mind-Blowing Visions of Alien Life

Science on the Web: Bear-Sized Aliens (video)

Monster of the Week: Husbands From Outer Space

Monster of the Week: The Long One

What might an alien third gender consist of?

Topics in this Podcast: biology, space, aliens