The tardigrade is a half-millimeter, eight-legged animal that lives in the moss on your roof — and it is arguably the toughest creature on Earth. It survives by squeezing out its own water and switching off life itself, a trick that has taken it through five mass extinctions and, in 2019, quite possibly onto the surface of the Moon.
The perfect introduction from Journey to the Microcosmos — real microscope footage of water bears lumbering through their world, plus a myth-check on what they actually can and can't survive.
The reference hub: 1,300+ species, 600 million years of survival, and the astonishing tolerance ranges — from -272°C to +150°C, crushing pressure, total dehydration, and impacts at 900 metres per second.
National Geographic on the everyday tardigrade — where they live, how they eat, and the 30 years they can spend without food or water before shrugging back to life.
A tour of the tardigrade's superpowers and, more interestingly, its limits: the specific conditions that finally kill an animal that seems designed to be unkillable.
How scientists traced the water bear's radiation resistance to a molecule called Dsup — a 'damage suppressor' that wraps around DNA — and why it could one day protect human cells too.
The secret at the heart of it all: cryptobiosis, the 'tun' state in which the animal expels its water, folds up into a husk, and stops all detectable metabolism — hidden life, waiting for rain.
When Israel's Beresheet lander crashed in 2019 it was carrying thousands of dehydrated tardigrades in a 'lunar library' — and they may still be up there, dormant in the dust, unable to wake without Earth's water.