Coronavirus: Did the coronavirus come from space? Expert addresses 'extraordinary claim'

The astrobiologist told in February: "The sudden outbreak of a new coronavirus is very likely to have a space connection."

The idea is not novel and is known in astronomy as panspermia - the theory life is being spread across the universe on fast-moving asteroids and comets.

Some scientists even speculate life on Earth was kick-started when a rock carrying the necessary building blocks crashed into our homeworld.

But the "extraordinary" claims about coronavirus have been challenged by another scientist who thinks it would be physically impossible for the virus to survive on a space rock.

Astrobiologist Graham Lau, who hosts NASA's Ask an Astrobiologist series, told the theory is unlikely.

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