Water Bears In Space

We chose them because they are special.  They are the toughest form of life we know of.  They can survive practically any planetary cataclysm.  They can survive in the vacuum of space, they can survive radiation.

-- Nova Spivack, co-founder of the Arch Mission Foundation, referring to tardigrades, aka "water bears", which were aboard an Israeli spacecraft and may have survived their crash onto the moon's surface in April 2019, via CNN, 7 August 2019