Is Time Travel Even Possible?
Two SciAm editors duke it out to see if wormholes and multiverses could in fact exist.

Is Time Travel Even Possible?
Two SciAm editors duke it out to see if wormholes and multiverses could in fact exist.
Parrot Babies Babble Just like Us
Parrot nestlings spend time stringing together jumbled mixtures of sound—a rehearsal for more adult conversations
A 19th-Century Obscenity Law Is Being Used Again to Limit Abortion
Recent rulings on the abortion pill cite the Comstock Act, a 150-year-old law that’s still on the books
These Mini Ecosystems Existed Underfoot of Dinosaurs, but Our Parking Lots Might Pave Them to Extinction
Vernal pools are safe havens for creatures such as fairy shrimp, and they have lived through the end of the dinosaurs, the breakup of Pangaea and multiple ice ages. But humans are paving them over.
This $600-Million Room Contains the World's Largest Collection of These Tiny Endangered Animals
Inside a vault at the Natural History Museum of Los Angeles lies a microscopic population of immense value—the repository for vernal pool fairy shrimp.
Surviving in the Ephemeral Pools of Life
Carpets of gold, burrowing toads and fairy shrimp all depend on vernal pools—habitats that, most of the time, do not exist.
This Fleeting Ecosystem Is Magical, and You Have Probably Never Heard of It or Even Noticed It
Vernal pools are home to spectacular residents such as fairy shrimp, but these unusual natural wonders are under threat.
Do We Need To Save the Whales Again?
A scientist who does whale necropsies — or in layman's terms, whale autopsies — tells us why so many dead whales are washing up on beaches.
The Bad Side of ‘Good’ Cholesterol
Very high HDL cholesterol levels almost double your risk of heart problems.
AI Chatbots and the Humans Who Love Them
Humans are building meaningful relationships with AI chatbots. What will the consequences be?
A Mission to Jupiter’s Strange Moons Is Finally on Its Way
The Jupiter Icy Moons Explorer (JUICE) and Europa Clipper missions will search for signs of habitability on three of Jupiter’s potentially ocean-bearing moons.
The Surprising Backstory behind Witch Hunts and Reproductive Labor
Two of the foremost experts on witch hunts talk about the link between the formation of domestic labor and the rise of witch hunting.