Dan Levitt

New evidence has paleontologists questioning whether a third of all dinosaur species ever existed. Could some discoveries once thought to be distinct species, in fact, be the same species at different stages of development? National Geographic joins famed paleontologists—including Jack Horner, a contributing expert to the Jurassic Park films—who are challenging the long held belief that young dinosaurs looked like miniature versions of their parents.

Scientists discuss the possibility of reverse-engineering the DNA of modern birds to recreate dinosaur species, instead of cloning fragments of dinosaur DNA extracted from amber and other ancient fossils.

Nuclear Nightmare: Japan in Crisis presents a comprehensive timeline of the massive earthquake and tsunami that triggered a horrific domino effect at Japan's Fukushima Daiichi power plant.

This film explores the most astonishing predictions of Jules Verne and H.G. Wells. Michio Kaku contributes.

Prompted by a little-known manuscript widely attributed to Adolf Hitler and discovered by an American historian , this engrossing History Channel documentary dissects Hitler's master plan for world domination, which never quite came to fruition. Included among the stacks of documents the United States seized from Nazi Germany, the shocking strategy was detailed in a "secret book" that appears to be an unpublished Mein Kampf sequel.

New evidence has paleontologists questioning whether a third of all dinosaur species ever existed. Could some discoveries once thought to be distinct species, in fact, be the same species at different stages of development? National Geographic joins famed paleontologists—including Jack Horner, a contributing expert to the Jurassic Park films—who are challenging the long held belief that young dinosaurs looked like miniature versions of their parents.

Scientists discuss the possibility of reverse-engineering the DNA of modern birds to recreate dinosaur species, instead of cloning fragments of dinosaur DNA extracted from amber and other ancient fossils.

Nuclear Nightmare: Japan in Crisis presents a comprehensive timeline of the massive earthquake and tsunami that triggered a horrific domino effect at Japan's Fukushima Daiichi power plant.

This film explores the most astonishing predictions of Jules Verne and H.G. Wells. Michio Kaku contributes.

This film explores the most astonishing predictions of Jules Verne and H.G. Wells. Michio Kaku contributes.

This film explores the most astonishing predictions of Jules Verne and H.G. Wells. Michio Kaku contributes.

Prompted by a little-known manuscript widely attributed to Adolf Hitler and discovered by an American historian , this engrossing History Channel documentary dissects Hitler's master plan for world domination, which never quite came to fruition. Included among the stacks of documents the United States seized from Nazi Germany, the shocking strategy was detailed in a "secret book" that appears to be an unpublished Mein Kampf sequel.