Pollen from sediment cores shows that a now dry channel cutting through Giza was once a flowing waterway that Egyptian pyramid builders could have used to transport supplies.
Laboratory experiments show that earthquakes may have helped early life evolve in an oxygen-free world.
More than 80% of urban residents will need AC by the 2050s, but many of the world’s poorer countries may struggle to meet that demand.
During a brief period in Earth’s past, a massive emission of carbon abruptly raised global temperatures, acidified oceans, and stamped out species. New data may help explain how it happened.
Shock waves from Cold War era nuclear tests gave seismologists a glimpse of the inner core. Its wobbly rotation could explain phenomena such as the periodic change in the length of a day.
After decades of uncertainty, scientists have finally shown that fossil fuel extraction has flooded the atmosphere with 4He.
Historic observations, manually transcribed from handwritten records, are giving scientists a fresh glimpse into Victorian era climate.
A shift in priority and approach to wetland restoration could reduce atmospheric carbon.
The annual list of America’s Most Endangered Rivers includes practical calls to action to turn the tide on threatened U.S. waterways.
Cool, moist nights are rarer than they were a few decades ago, and that’s giving wildfires an edge over crews trying to hold fire lines.