Fall equinox: Why the first day of fall isn’t as equal as you might think
Youth activists plan protests to demand action on climate as big events open in NYC
As coral reefs face unprecedented heat, scientists experiment with new ways to protect them
Sword with markings of ancient pharaoh Ramses II unearthed in Egypt
Europe's Mars 'fetch rover' nails sample pick-up test in the field (video)
A new genetic analysis of animals in the Wuhan market in 2019 may help find COVID-19's origin
Ancient coins found by Indiana Jones enthusiast sell for $176,000
Mannequins flew around the moon on a path astronauts could soon take. Scientists just revealed how they fared
