Fossils prove that birds evolved from dinosaurs

The fossils, which were unearthed in the Liaoning province in China, date back more than 120 million years and offer, according to Currie, conclusive proof that birds evolved from dinosaurs, a theory that has been hotly contested for more than 20 years. He said the feathers on the dinosaurs probably evolved for warmth, suggesting that some of the animals may have been warm-blooded.

Guesser: Phillip Currie, Royal Tyrrell Museum, Paleontology, Canada