The meteorite that killed off the dinosaurs 66 million years took a toll on evergreen trees.
Titanosaurian remains are found on every continent but history outside of South America is less well known.
T. rex may still be the king of dinosaurs, but new fossils suggest Spinosaurus had star power of its own and sported a dramatic sail.
Prevalence of the dinosaur's skin in fossil record may have more to do with texture, toughness than population density or habitat.
New research finds that nighttime behavior may have evolved 100 million years earlier than mammals did.
Dreadnoughtus schrani measured over 83 feet long -- and was still growing at the time of its death.
Newly discovered dinosaur fossils, plus a new assessment of dino size, have led to a revised list of the top 10 largest dinosaurs that ever lived.
Two of the earliest mammal groups of the period likely were discerning about the types of insects they ate.
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