Scientists suspected that two populations, African savannah and African forest elephants, were separate species because of their size differences.
What are prehistoric runways and why are they so important?
Learn how whales became sailors on this Moment of Science.
In recent years, palaeontologists have unearthed some of the smallest dinosaurs known - not bigger than 20 feet.
Until very recently, humans tended to reproduce before reaching full adult maturity, as did the dinosaurs. Learn more on this Moment of Science.
Dinosaurs are ancient history, but there is still a very exciting future for fossil research.
Researchers who study jellyfish were delighted when a whole bunch of them turned up in Wisconsin. They were found in a sandstone quarry.