The mysterious “water bears” long defied evolutionary classification. Now some say they are degenerate arthropods.
Are "evolutionary novelties" in the lizard family derivable from a simpler chordate in the Cambrian?
The origin of whales has been called a “poster child for macroevolution.”
Filling in “missing links” is, at least in pop science terms, something we associate with evolutionary problems that have been solved. That’s the opposite of the case here.
It’s been a rough season for Precambrian animal fossils.