If you go by cartoons and T-shirts, you might think evolution proceeds as an orderly march toward a preordained finish line. But evolution has no endpoint in mind.

The ArchaeoGlobe Project assessed knowledge on human land use over the past 10,000 years, through the contributions of more than 200 archaeologists. It concluded that, by 3,000 years ago, most of Earth was already transformed by hunter-gatherers, farmers and pastoralists.

On August 28, 2019, NASA announced that the 2 halves of the James Webb Space Telescope have now been successfully connected. The telescope is being assembled at Northrop Grumman’s facilities in Redondo Beach, California.

The Mars 2020 rover, scheduled for launch next July, doesn't have a name yet. A NASA contest invites U.S. students grades K–12 to suggest names for the rover.

NEOs are near-Earth objects, asteroids and small comets that sweep near Earth and have the potential to cause harm. Arecibo Observatory in Puerto Rico has, since the 1990s, been finding about 60 to 120 of these objects every year.

Nearly 40,000 fires are burning in Brazil’s Amazon rainforest, the latest outbreak in an overactive fire season. Don’t blame dry weather, say environmentalists. These Amazonian wildfires are a human-made disaster.

Arecibo in Puerto Rico was completed in 1963. In recent years, it has weathered multiple hurricanes. The emergency supplemental funds - supported by the U.S. Congress - represent an investment in the future of this large, famous and much-loved radio dish.

Learn what it would be like to travel to Chile - sometimes called astronomy's world capital - in this final report from Robert Pettengill with the Astronomy in Chile Educator Ambassador Program. Thank you for your dispatches, Rob!

A USGS study identified plastic in more than 90% of rainwater samples taken from across Colorado.

Research at one of the world's clearest, cleanest lakes suggests the problem of microplastics is widespread in freshwater systems and not just in oceans.