Did We Just Put Tardigrades on the Moon? Probably.

The Cosmic Companion
5 min readAug 6, 2019

As far as tiny, cute, yet utterly bizarre animals go, tardigrades are almost certainly the best known. Also known as water bears, these creatures are only about a millimeter (1/25th of an inch) long, and they are known to survive in extreme conditions, even outer space. Now, it appears thousands of these tiny creatures may now be living on the Moon.

When the Beresheet spacecraft, designed and managed by Israeli space company SpaceIL, crashed into the Moon on April 11, the collision may have spread live tardigrades on the lunar surface.

A tardigrade seen in a microscopic photograph. Image credit: University of Oxford

“For the first 24 hours we were just in shock. We sort of expected that it would be successful. We knew there were risks but we didn’t think the risks were that significant,” Nova Spivack, founder of the Arch Mission Foundation, stated. It was his organization which designed the tardigrade payload.

The robotic lander included thousands of tardigrades (as well as human DNA) encased in resin between layers of nickel, much like an insect trapped in amber between layers of metal. Tape used in holding the biological time capsule in place was also coated with thousands of tardigrades. It is unknown whether the tiny creatures survived the crash, although they are among the most resilient creatures on Earth.

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The Cosmic Companion

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