Scientists study the perfectly preserved remains of an adolescent allosaurus they call "Big Al."
Dinosaurs are extinguished by an asteroid in prehistoric Idaho.
Dinosaurs thrived during springtime when ferns and evergreens reappeared in the polar forest.
With wings longer than those of a small plane, pterosaurs were the largest creatures ever known to have flown.
Large marine reptiles command the seas during the late Jurassic period.
The Jurassic period saw the advent of the largest and strongest dinosaurs that ever roamed the Earth.
The life of the first reptilian carnivores on Earth, told through computer animation.
Dinosaurs live in the shallow seas and skies of Europe and South America around 160 million and 125 million B.C.
New studies suggest how climate changes precipitated the rise and evolution of dinosaurs.
The alternating seasons of summer and winter dictate dinosaurs' habits; tyrannosaurs reign over North America.
Imaging technology and scientific collaboration depict dinosaurs in the wild.