Following the mass extinction of dinosaurs, mammals were able to rapidly diversify and radiate without the threat of predation.
The evolution of modern birds was largely shaped by Earth's changing geography and climate. In a recent study, researchers discovered the birds we know today share a common ancestor that arose in South America 90 million years ago.
Scientists from Ghent University have reevaluated the biodiversity of Persian dwarf snakes and found there are actually six different species, rather than just one.
A newly examined fossil sea urchin represents the oldest known specimen of its kind. This suggests that modern sea urchins diversified from their extinct ancestors ten million years earlier than researchers previously thought.
A newly discovered pig-snouted turtle, Arvinachelys golden, may help researchers fill in the gaps of turtle evolution.
While evolving with specialized defenses has helped animals escape predation, long-term risks need to be considered. The simple act of camouflage or mimicry, which sufficiently confuses prey, doesn't seem to have backfired, but the use of chemical defenses has. In fact, some amphibians that release lethal toxins to kill predators are now at a higher risk of extinction.