A meteor spotted in the Philadelphia region Tuesday afternoon traveled more than 100 miles before disintegrating, NASA said.
More than 200 people from Pennsylvania, Delaware, New Jersey, New York and Connecticut reported seeing the meteor,…

A meteor spotted in the Philadelphia region Tuesday afternoon traveled more than 100 miles before disintegrating, NASA said.
More than 200 people from Pennsylvania, Delaware, New Jersey, New York and Connecticut reported seeing the meteor,…

“Forever chemicals” — technically known as perfluoroalkyl and polyfluoroalkyl substances (PFAS) — are remarkably useful things. They’re also among the most dangerous pollutants on the planet, says investigative journalist Mariah Blake.
The…

April 7, 2026
2 min read
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NASA’s Artemis II moon mission astronauts make first-ever ‘ship to ship’ call to ISS
This exchange between the Artemis II crew and astronauts onboard the International Space Station marks the…

A series of random questions answered by Harvard experts.
Robert Wood is the Harry Lewis and Marlyn McGrath Professor of Engineering and Applied Sciences at the Harvard John A. Paulson School of Engineering and Applied…

April 7, 2026
3 min read
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The mathematically correct way to slice a pizza
The intermediate value theorem shows us how to find an even center on an irregular shape

Smith…

Artemis II’s four astronauts are currently on Day 7 of their 10-day mission to the moon. On Day 6, Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialists Jeremy Hansen and Christina Koch set a record for the farthest distance…

Nasa’s Artemis II astronauts have described the powerful emotion felt when soaring over the moon as they photographed impact craters, cracks and ridges and began their long journey home.
Among the eagerly awaited images captured by the crew, who…

There are a lot of good ideas floating around about the conditions necessary for life to develop, said Peter Girguis, professor of organismic and evolutionary biology in the Faculty of Arts and Sciences and co-director of the Harvard Microbial…

In medieval Spain, two men were buried in a prehistoric stone monument that had been constructed millennia earlier. Now, a new analysis of these burials is revealing clues about their ancestry but also leaving some mysteries, such as which…