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Misinterpreting Fossil Graveyards

Fossils are real, but the stories concocted to explain how mixed-up animals became buried together involve assumptions.

The Flying Giraffe and Other Fossil Stories of Extinct Reptiles

Imagine a giraffe leaping into the air and flying off. That's what this giant pterosaur was like. Other interpretations about extinct reptiles are not so certain.

Finding Dinosaurs Is Not the Same as Explaining Them

What's turning up in dinosaur digs around the world? Bones, footprints and speculations.

Darwin Can't Win for Losing

Progress must be made with gains, not losses.

Evaluating the Chicxulub Impact Dinosaur Extinction Hypothesis

Science Magazine claimed the Mexican crater named Chicxulub is the smoking gun of the dinosaurs' demise, and the media fell in line. Are there reasons to doubt the story?

Paradigm Shift: Impact Didn't Kill Dinosaurs

A new study casts doubt on whether asteroid impacts led to extinctions. It's based on re-interpreting geological evidence used to identify impacts. This finding, if sustained, would undermine the theory that an impact killed off the dinosaurs and a later impact led to the extinction of many large mammals. Even more significant, an overturn of the impact hypothesis would illustrate that scientists are capable of going off on wrong tangents for decades.

Where Do Gems and Precious Metals Come From?

Gold, diamonds, and other precious metals and gems... they are found close to the surface of the earth where humans can mine them and make jewelry. But they shouldn’t be there. Heavy elements should have sunk deep into the core of the Earth soon after it was formed. Wait till you hear some of the latest ideas about how precious metals and gems arrived near the surface. Maybe they shot up from the mantle. Maybe they came from outer space.
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