23-07-2025
Fossilized penis worm suggests Grand Canyon was an evolutionary hotbed
Roughly a half-billion years ago, a minuscule penis worm armed with a retractable spiky mouth crawled around prehistoric Arizona.
After eons fossilized inside a rock, the newly identified species was unveiled in a study Wednesday, and the worm's sophisticated eating apparatus shows that the Grand Canyon was once an evolutionary 'Goldilocks zone,' its authors say, where conditions were so abundant that animals like this one could afford to take risks as they evolved.
