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?

How does a one-tonne dino hatch its eggs? Carefully

Most dinosaurs buried their eggs and hoped for the best, but some species—including a few hefty ones—built nests and pampered unhatched offspring much as birds do today, researchers reported Wednesday.

Caterpillar 'road rage' could affect migration

Monarch butterfly caterpillars living next to roads may be stressed by the sound of passing cars and trucks, according to a new study from the University of Georgia.

Mixed forests: Ecologically and economically superior

Mixed forests are more productive than monocultures. This is true on all five continents, and particularly in regions with high precipitation. These findings from an international overview study, in which the Technical University ...

Island emus' size related to size of island homes

Emus that lived isolated on Australia's offshore islands until the 19th century, including Kangaroo Island, King Island and Tasmania, were smaller versions of their larger mainland relatives – and their overall body size ...

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