World's oldest dinosaur embryo bonebed yields organic remains

The great age of the embryos is unusual because almost all known dinosaur embryos are from the Cretaceous Period. The Cretaceous ended some 125 million years after the bones at the Lufeng site were buried and fossilized.

Why birds don't have teeth

Why did birds lose their teeth? Was it so they would be lighter in the air? Or are pointy beaks better for worm-eating than the jagged jaws of dinosaur ancestors?

Randomness a key in spread of disease, other 'evil'

An unfortunate church dinner more than 100 years ago did more than just spread typhoid fever to scores of Californians. It led theorists on a quest to understand why many diseases - including typhoid, measles, polio, malaria, ...

'Baby, it's hot outside': Why birds sing to eggs

Much like parents who talk to a pregnant woman's belly, some birds sing to their eggs before they hatch, and the reason may be to prepare them for a warming world, researchers said Thursday.

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Incubation

The word incubation and similar (from the Latin incubare, "to lie upon") may refer to:

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