Dangerous heat raises safety concerns for visitors at U.S. National Parks
Critical equipment for Titanic sub search caught in red tape, National Geographic report says
Scientists discover at least 20 new species in underwater ecosystem
Dr. Nate Smith on discovery of new dinosaur species
Early humans likely prompted the demise of woolly mammoths, other ancient species
Donald Trump Jr. leads RNC crowd in chant: 'Fight! Fight! Fight!'
'Over my dead body': Florida congressman slams leaked proposal to build golf courses at state parks
Disney theme parks to get major upgrade
CIA director in Cairo as hostage, cease-fire talks reach critical point
Maryland Gov. Wes Moore says state will do a full evaluation of all critical bridges
