Paleontologists ponder how a carnosaur a bit smaller than Tyrannosaurus Rex could hunt a sauropod several times its size when T-Rex hunted smaller prey. The answer lies in a detailed look at the predator's anatomy, their prey and and a fossil track of an attack on a sauropod

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For 10 million years amphicyon ruled north america as top predator. With the strenght of a bear, conbined witht the speed, tenacity, and brain power of a dog, The bear-dog crushes all miocene mammal competetors. After seeing the latest episode of "Prehistoric Predators" on "NG" and "Prehistoric Washington DC" and "Monsters Resurrected" on "Disc" the bear-dog has now even gained it's own group here on DA. Where fans of this rarly popular beast can post pictures and drawings for all to see.

Paleontologists ponder how a carnosaur a bit smaller than Tyrannosaurus Rex could hunt a sauropod several times its size when T-Rex hunted smaller prey. The answer lies in a detailed look at the predator's anatomy, their prey and and a fossil track of an attack on a sauropod

After the age of dinosaurs Australia was dominated by reptiles rather than the marsupials it is known for. The biggest of them all was a monitor lizard larger than a crocodile called Magalania. This program reviews the anatomical features that make Megalania and its chief competitor, the marsupial lion, apex predators.

Spinosaurus was the largest dinosaur carnivore in history but was long known only from the photographs of a single partial skeleton lost to the world in a World War Two air raid. That, of course, makes paleontologists all the more curious and determined and additional fossil fragments have gradually been found. This program reviews what they have uncovered and what they suspect.

For most of us, sadness is a mood that comes and goes, but for others, it becomes a debilitating disease with life threatening implications. In this program we explore the mysteries of Depression. We travel through the realms of diagnosis and treatment; learning how drugs like Prozac and psychotherapy help victims. We also learn about manic depressive behavior and forms of depression unique to men and women. Our host, Kat, discovers electroshock therapy and the promising frontiers of brain imaging and drug research.

Spinosaurus was the largest dinosaur carnivore in history but was long known only from the photographs of a single partial skeleton lost to the world in a World War Two air raid. That, of course, makes paleontologists all the more curious and determined and additional fossil fragments have gradually been found. This program reviews what they have uncovered and what they suspect.