Grizzly Bears from Outer Space - a podcast by iHeartRadio

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?
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