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PaleontologySahara yields second-largest dinosaur
Excavations near an Egyptian oasis have unearthed the fossils of an animal that probably ranks as the second-most-massive dinosaur known.
By Sid Perkins -
PaleontologyFossil footprints could be monumental
Trace fossils found in a vacant lot in a small town in Utah, including the footprints of meat-eating dinosaurs, could soon be protected as part of a new U.S. national monument.
By Sid Perkins -
ChemistryHassium holds its place at the table
Researchers have performed the first ever chemical studies on the element hassium.
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ChemistryChemists make hard-to-catch molecules
Chemists have devised a new way to stabilize highly reactive molecules called carbenes.