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Deaths during Hajj: How this year's pilgrimage turned fatal
Gassy cows and pigs will face a carbon tax in Denmark — a world first
CDC issues dengue fever alert in the U.S.
Summer’s start: A deadly week of extreme weather
NASA astronauts' return on Boeing's spaceship has been delayed repeatedly
A slew of new weight loss drugs are in development. Here’s how they work.
A deadly tornado and a rare feat for storm chasers
Levels of contamination in the Seine remain unsafe for Paris Olympians, report says
California to become third state to mandate heat protections for indoor workers
The Iberian lynx is back from the brink of extinction, thanks to conservation efforts
Climate change made killer heat wave in Southwest even warmer and 35 times more likely
A giant dinosaur roamed Montana with blade-like horns. It's been named after Norse god Loki.
So long plastic air pillows: Amazon shifting to recycled paper filling for packages in North America
A record-breaking number of mosquitoes are carrying West Nile virus around Las Vegas
Colombian family’s genes offer new clue to delaying onset of Alzheimer’s
Collecting sex-crazed zombie cicadas on speed: Scientists track a bug-controlling fungus
White House swears in first class of American Climate Corps
Olympic hopefuls speak out about fears of severe summer heat in Paris