Did life on Earth emerge spontaneously from primordial pools, or fall from the cosmos with meteoric fanfare? Not sure as it once was, science ponders the Tardigrade.
Tardigrade or “water bear” is the only life form we know of able to survive the airless vacuum of space. I’m just getting started – toss in hundreds of times radiation levels that would kill all other lifeforms, survive six times the pressure of our deepest oceans, and laugh at being frozen to absolute zero (-273 C) or boiled above 150 C. You could dehydrate one for years then add water – abracadabra, business as usual. Old age is the only thing capable of spelling demise – don’t hold your breath, life expectancy is 200 years.
Discovered by Italian Lazarro Sapallanzani in 1773, water bears are thought to have inhabited Earth for 530 million years. Measuring 0.5 mm – 1.2 mm in length, they can be found anywhere on Earth.
The Tardigrade begs evolution to explain why. Evolution adapts species for life on our planet, why would a species need to withstand ravages of time and space?