Astronomers find evidence for three subpopulations of merging black holes

Gray whales migrate from Arctic waters full of food to the lagoons of Baja Mexico—but as the climate crisis gathers pace, they have been sighted foraging in unexpected places. Recently, some have begun to explore the dangerously busy waters of San Francisco Bay. Scientists at the Marine Mammal Center and the California Academy of Sciences investigating an unexpectedly high death toll among gray whales have found that almost 20% of individuals seen entering the Bay died there, in large part due t

The relationship between science and pop culture often looks like a one-way street: scientific discoveries inspire films, television and novels, particularly in science fiction. But the relationship really goes both ways, and extends beyond sci-fi.

As NASA's Artemis II mission completed its lunar flyby, the astronauts sent back a stunning image of the colorful Earth setting behind the moon. This breathtaking photo, called Earthset, draws inevitable comparisons with the original Earthrise photo from the Apollo 8 flight in 1968.

Rhodium is one of the most powerful catalytic metals known to chemistry. Small amounts of it can drive reactions that produce millions of tons of useful chemicals every year. But getting rhodium to work well—quickly, selectively, and without degrading—depends heavily on the ligands surrounding it.