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Boning Up: Tissue for grafts grown inside the body
Scientists have discovered a new way to stimulate one part of an animal's body to grow extra bone tissue that can be transplanted elsewhere.
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PaleontologyYoung and Helpless: Fossils suggest that dinosaur parents cared
Skeletal remains found in the fossilized eggs of an early dinosaur hint that adults of the species may have cared for their hatchlings.
By Sid Perkins -
AnimalsWing Ding: Bird rubs feathers for cricketlike song
Scientists say that they have found the first vertebrate to make its courtship music in the same way as a cricket does.
By Susan Milius -
PhysicsGlints from Inner Space: Sensing Earth’s hidden radioactivity
Physicists have observed signatures of radioactivity deep within Earth, enabling measurement of planet-wide thorium and uranium quantities.