Astronomy

Play this crossword inspired by the July/August 2025 issue of Scientific American

Earth will likely warm by more than 1.5 degrees Celsius, but we can’t give up on trying to get temperatures back down

New strategies help to reduce callous and unemotional traits in children, guiding them toward productive lives

Inside this double issue of SciAm, you’ll find black holes that burp up their stellar meals, metal detectorists that hit pay dirt, hope for psychopathy, the truth about testosterone and a consumer guide to sustainable clothes shopping

When nights stay hot, more people die, many from cardiovascular problems. But there are simple methods you can use to stay cooler and healthier

After black holes devour stars, sometimes the feast comes back up

Puzzle out the sequence of numbers that fill these polygons

The Danish government deputized private detectorists to unearth artifacts buried in farm fields. Their finds are revealing the country’s past in extraordinary detail

Science in meter and verse

Trade impulse clothing purchases for botanical dyes, upcycled apparel, creative mending, flexible sizing, and more

Toxic cigars; dueling with a swordfish

Letters to the editors for the March 2025 issue of Scientific American

To boost mood and manliness, men are spending lots of money on the hormone testosterone—yet they may see trouble instead of benefits

One hundred years after the Scopes trial, religious ideologues are still trying to supplant evidence-based curricula with myths, to the detriment of a well-informed society

Staff at the European Southern Observatory have a system to clean the La Silla Observatory's delicate mirrors without breaking them.

AI is shedding new light on the 12,000-year conversation between cats and their humans, suggesting that house cats wield a far richer vocabulary than once thought

Using NASA's Chandra X-ray space telescope, astronomers have discovered an entire galaxy cluster wrapped in a 20 million light-year-wide envelope of charged particles.

The beads are over 3.3 billion years old, and date from the formation of the "Man in the Moon."

Do you know the names of some of the brightest stars?

A SpaceX Falcon 9 rocket placed 26 Starlink internet broadband satellites into low Earth orbit, lifting off from Vandenberg Space Force Base in California on June 16, 2025.