A 500-million-year-old spider relative grows claws where they shouldn’t.
The fossils were not noticeable at all. This first occurred to Harvard paleontologist Rudy LeRochy-Aubril while examining arthropod fossils dating back to the Cambrian period (538.8 million to 485.4 million years ago). “But when I prepared it, it unexpectedly revealed exquisitely preserved limbs, including a pair of frontal claws protruding from the head,” says Lillocy-Aubril. … Read more