The image offers a never-before-seen view of the black hole at the center of our galaxy, as well as a clue that many or all black holes may share a pattern.
The eclipse could be a scientific bonanza, thanks to new spacecraft and telescopes, the moon's proximity to Earth and a chance of dramatic bursts of plasma from an active sun.
The rules relax initial tailpipe limits proposed last year but eventually get close to the strict standards set out by the Environmental Protection Agency.
More than 92% of the countries and regions analyzed exceeded guidelines for particulate pollution, according to a report from IQAir, a Swiss air quality-monitoring company.
Comet 12P/Pons-Brooks was nicknamed the “devil comet” because an eruption last year left it with two distinct trails of gas and ice in the shape of devil horns.
The consequences of climate change are already taking a toll on some U.S. communities. In Cameron, Louisiana, hope comes from a natural gas plant that activists call a "carbon bomb."
Jane Gilbert is working to figure out how one of the hottest cities in the U.S. can protect its most vulnerable denizens while navigating Florida politics.
In the rocket’s third and most ambitious test flight yet, it achieved two milestones: Starship successfully reached orbit and re-entered Earth’s atmosphere for the first time.