Giant sperm preserved in an ancient ostracod may be the oldest known sperm fossil, showing that giant sperm have existed at least 100 million years.
A group of crocs, or at least one pregnant female, may have made a transatlantic journey millions of years ago to colonize new land.
One of the earliest flying dinosaurs, the four-winged Microraptor, may have molted just a bit at a time so that it could fly year-round.
Finding soft-shelled dinosaur eggs in the fossil record for the first time has scientists rethinking how dinosaur eggs evolved.
The 106-million-year-old tracks suggest that other puzzling nearby fossils were also likely made by a bipedal croc ancestor, not a giant pterosaur.
Fossils from over 500 million years ago might be the first known example of parasitism in the fossil record, though the evidence isn’t conclusive.
Unlike today’s plankton-eating anchovies with tiny teeth, ancient anchovy kin had lower jaw of sharp spikes paired with a single giant sabertooth.
Paleontologists have finally matched a bizarre fossil, Adalatherium hui, to an obscure group of ancient mammals called gondwanatherians.
Unique among known dinosaurs, Spinosaurus had a finlike tail, which the predator may have used to propel itself through the water.
Several deep caves in France are proving to be a surprising source of dinosaur tracks.