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Fish Fossil Suggests Ancient Push-Ups
Working MST -- Martian Standard Time
Study: Ferns Younger, 'Smarter' Than Believed
Value of Heart Disease Test Questioned
Human Diseases Mirrored in Rat Genome
Saving the World's Spineless
U.S. Firm Wants to Test All Cattle for Mad Cow
Panel Calls for Rules on Embryo Use
Safety of Generic AIDS Drugs Debated
Future of Nuclear Energy in the U.S.
Genetic Ethics: 'Against Perfection'
How NASA Averted Mars Rover Crisis
NASA to Test 'Scramjet' Aircraft
U.S. Picks Medicare Drug-Card Providers
Researchers Decode Malaria Link