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Dinosaur Planet: Size Evolution

Related Article: Learn more about extinct animals.

Scott Sampson, a paleontologist, discusses how animals can evolve to better fit their surroundings. Learn more on Discovery Channel's "Dinosaur Planet."

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Building Dinosaur Models from Fossils

Building Dinosaur Models from Fossils (2:47)

Watch this video about paleontology on HowStuffWorks. University of Chicago fossil preparator, Tyler Keillor, discusses the iterative process of creating the model for Tiktaalik, the fossil discovery by paleontologist Neil Shubin that fills in the... More »

Tiktaalik: Fish out of Water

Tiktaalik: Fish out of Water (1:43)

Watch this video about paleontologists discussing the first fish that walked out of the ocean on HowStuffWorks. Paleontologist Neil Shubin discusses his newly discovered species, Tiktaalik roseae, that fills in the evolutionary gap between fish and... More »

Zeresenay Alemseged on Fossils

Zeresenay Alemseged on Fossils (17:48)

Watch this video showing paleoanthropologist Zeresenay Alemseged talk at TED about fossils and the key to humanity on HowStuffWorks. Africa is home to the beginning of the human world and Alemseged explains that we need to better understand our past... More »

T-Rex Bones

T-Rex Bones (1:29)

From the archives of Discovery: Millions of years after its death, the Tyrannosaurus Rex is still an imposing creature. Learn more about the T-Rex and fossilization in this video.

Discoveries: Utah Dinosaur

Discoveries: Utah Dinosaur (3:32)

A newly discovered dinosaur graveyard is yielding hundreds of animals including one especially important, brand-new dinosaur species. Learn more about our earth-ruling predecessors in this video.

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Animal Armageddon: Straight-Shelled Nautiloid

Animal Armageddon: Straight-Shelled Nautiloid (2:41)

The great white shark of its time, the straight-shelled nautiloid is a perfectly designed killing machine-- up to 20 feet long with an insatiable hunger. Learn more in this video from Animal Planet's "Animal Armageddon."

Animal Armageddon: Eurypterids

Animal Armageddon: Eurypterids (2:13)

Vicious sea scorpions called eurypterids routinely challenged the nautiloids for the best feeding grounds 450 million years ago. Learn more in this video from Animal Planet's "Animal Armageddon."

Animal Armageddon: Astraspis

Animal Armageddon: Astraspis (1:40)

One of only a few fish species prior to Earth's first mass extinction 450 million years ago, Astraspis had something never before seen: a primitive backbone. Learn more in this video from Animal Planet's "Animal Armageddon."

Animal Armageddon: Acanthodian

Animal Armageddon: Acanthodian (1:32)

Acanthodian, a fish, was one of the first vertebrates with jaws. This revolutionary adaptation allowed fish, a once-rare lifeform, to take over the planet. Learn more in this video from Animal Planet's "Animal Armageddon."

Dinos: The Skinny On Dino Bling

Dinos: The Skinny On Dino Bling (2:14)

Horns, spikes and plates got a lot of attention in the days of dinosaurs. Join James Williams, host of Discovery's "Dinos" series, as he learns what all the fuss was about.

Dinos: Dino Base Camp

Dinos: Dino Base Camp (1:54)

A lot can happen at the base camp of a dinosaur dig, including saving a bird's life. Watch as James Williams, host of Discovery's "Dinos" series, gets the scoop.

Dinos: The Futurist: Retro-Engineering Dinos

Dinos: The Futurist: Retro-Engineering Dinos (2:10)

Can scientists flip a genetic switch and turn a bird into a dinosaur? Not quite yet, but not it's so far off either. James Williams gets the story from paleontologist Jack Horner.

Animals: X-Ray Vision Shows Dino-Era Bugs

Animals: X-Ray Vision Shows Dino-Era Bugs (1:02)

Using high energy X-rays, scientists have discovered fossilized bugs and dinosaur feathers in opaque amber from the Mid-Cretaceous era.

Discovery Dinosaurs: Get to Know a Duckbilled Dinosaur

Discovery Dinosaurs: Get to Know a Duckbilled Dinosaur (3:29)

Did you know some duckbilled dinosaurs were so big that they could terrorize a T. rex? Check out this video to learn all about duckbills.

Discovery Dinosaurs: How Dinosaurs Become Mummies

Discovery Dinosaurs: How Dinosaurs Become Mummies (2:33)

In this video, paleontologist Robert Bakker explains three different ways a dinosaur can become a mummy.