Updated: 4 min 2 sec ago
In 1994, the South Canyon Fire killed 14 firefighters and changed how wildfires are fought. Then last year in Arizona, tragedy struck again.
A satellite spies a reservoir, a hurricane portrait is snapped, and part of a new rocket passes design review in this week's space gallery.
Global warming threatens visitor experience and national treasures, scientists say.
It comes down to warm ocean water and the Earth's eastward rotation.
Scientists suggest early humans developed their distinguishing features in fragmented fashion, rather than all at once.
A planet once described as having "100 percent certainty of life" looks like it may not be a planet at all, astronomers report.
New papers in Science debate the limitations of international agreements on climate change and suggest reforms.
A giant machine is digging a tunnel to channel storm water for treatment in an effort to clean the city's polluted rivers.
A patriotic pup takes flight, fireworks light up the night, and flags flutter in the wind.
Guayusa tea may have health benefits for those who drink it and economic benefits for the indigenous people who grow it.
The Philadelphia Museum of Art has a display of beautifully designed kitchen and tableware—with a subversive message.
The region once known as the cradle of civilization has seen significant changes.
Rwanda holds official naming ceremony for baby gorillas born over the past year.
Feathers covered the Archaeopteryx, the flightless ancient ancestral bird from the age of dinosaurs, a newly found fossil shows.
Neanderthal relatives may have gifted Tibetans with a gene for high-altitude living.
A late response, the disease's spread to urban areas, and superstition have allowed the virus get out of hand.
What caused whales that had lived off the Bahamas for 30 million years to become fatally stranded on beaches?
Kangaroos use their tails when walking, in effect giving them a fifth "leg."
A Facebook study raises questions about social media corporations experimenting on their customers, says one expert.
New NRDC report warns of summer woes worsened by climate change, from poison ivy to allergies, heat waves, and ruined vacations.