Paleontology
- 			 Paleontology PaleontologyHow to tell if a T. rex is expectingA “pregnancy” test for tyrannosaurs relies on chemical analyses of medullary bone, a reproductive tissue found in female birds. By Meghan Rosen
- 			 Paleontology PaleontologyTrue nature of ‘Tully monster’ revealedThe identity of a 300-million-year-old enigmatic creature known as the “Tully monster” is a mystery no longer. By Meghan Rosen
- 			 Paleontology PaleontologyNew tyrannosaur bridges gap from medium to monstrousHorse-sized Timurlengia euotica had a brain and ears like its bigger relative Tyrannosaurus rex, which lived millions of years later. By Beth Geiger
- 			 Paleontology PaleontologyFree virtual fossils for everyoneMorphoSource.org archives 3-D images of bones from over 200 genera of both living and extinct animals. By Erin Wayman
- 			 Paleontology PaleontologyLizards locked in amber provide clues to reptile evolutionAmber-encased lizard remains that date to 99 million years ago may shed light on the evolution of geckos and chameleons. 
- 			 Paleontology PaleontologyFossil reveals an ancient arthropod’s nervous systemA roughly 520-million-year-old fossil preserved an ancient arthropod’s ventral nerve cord and peripheral nerves. 
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- 			 Paleontology PaleontologySurprise! Ancient armadillos are related to modern armadillosDNA evidence proves that ancient glyptodonts are indeed related to today’s armadillos, as Charles Darwin suspected. 
- 			 Paleontology PaleontologyPlesiosaurs swam like penguinsComputer simulations of plesiosaur swimming motion may resolve long-standing debate on how the marine reptile got around. 
- 			 Paleontology PaleontologyFossils provide link in dino crest evolutionFossils from a newly identified duck-billed dinosaur in Montana could explain how their descendants developed flamboyant nose crests. 
- 			 Paleontology PaleontologySaber-toothed salmon teeth more like tusks than fangsSaber-toothed salmon teeth may not have been positioned like fangs at all. By Susan Milius
- 			 Particle Physics Particle PhysicsDark matter helped destroy the dinosaurs, physicist positsIn ‘Dark Matter and the Dinosaurs,’ Lisa Randall finds connections between particle physics, cosmology, geology and paleontology. By Andrew Grant