Scientific American Content: Global

The U.S. has held its measles-free status for more than 25 years. Experts say unrelenting outbreaks in the past year may change that

In rethinking whether AI is sentient, we are asking bigger questions about cognition, human-machine interaction and even our own consciousness

Consciousness researchers studying “islands of awareness” have found that disconnected brains likely sink into a strange form of deep sleep

Extremophile molds are invading art museums and devouring their collections. Stigma and climate change have fueled their spread

Giant atoms; corpses for science

A large dataset shows some dog stereotypes are based in reality, and others might be unfair characterizations

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

The Nobel Prizes remind us how science can unite society and inspire hope for the future

Will brain science deliver answers about consciousness or hit another wall?

The James Webb Space Telescope should soon be able to spot the first generation of stars in space

Science in meter and verse

Motion is the new potion, and rest is no longer the best

Researchers are close to making “reversed” cells that may wipe us off the planet

The many, many ways researchers hope to solve the toughest mystery in science

Pick an unusual winning poker hand in this math puzzle

Play this crossword inspired by the February 2026 issue of Scientific American

A pet cow named Veronika uses tools in a surprisingly sophisticated way—possibly because she has been allowed to live her best life

Positive thinking may boost immune response from vaccines, new brain training study shows

Ribbon worms can grow to enormous lengths, and one named Baseodiscus the Eldest is showing how little we know about them—including how long they live

Spiders scare off predators by seemingly supersizing themselves

Why the EPA’s air pollution rule change could make the air dirtier, how cancer survival hit a record-high, and what we know about the first-ever medical evacuation from the International Space Station

NASA rolled out the fully stacked Artemis II rocket and Orion capsule on Saturday, embarking on a four-mile journey to the launch pad

Scientists are just beginning to understand the signals that determine the length of dogs’ ears

Why today’s AI systems struggle with consistency, and how emerging world models aim to give machines a steady grasp of space and time

The possible health effects of radiofrequency waves emitted by cell phones has been a subject of debate for decades

Florida’s iguanas are an introduced species, and they aren’t used to the chilly temperatures the state is currently experiencing

On Friday NASA laid out the time line for Artemis II, humanity’s first crewed mission to the moon in more than 50 years

A distinctive nebula inside the constellation Lyra holds a never-before-seen cloud of iron atoms—and researchers aren’t sure why

Stars emit lots of green light, but our eyes don’t let us see them that way

This mysterious type of fat cell may play an important role in heart health, new research shows

A break down of why Venezuela’s oil boom is clashing with a hotter, more fragile planet

The Trump administration’s top science adviser urged the adoption of a single national AI rule book as lawmakers pressed him on who would pay for the build-out

This clinical trial in Guinea-Bissau would withhold vaccination from some babies, sparking ethical concerns

The naturally mummified remains of dozens of cheetahs hidden deep in caves in Saudia Arabia shed light on where the animals lived in the past, which might inform rewilding efforts

Puzzling red spots in images from the James Webb Space Telescope are probably young supermassive black holes obscured by dense cocoons of gas

Wikipedia had to fight to establish its legitimacy—and now it faces a new existential threat posed by generative AI

Mosquitoes captured in the remnants of the Atlantic Forest in Brazil predominantly feasted on humans instead of other animals, a new study shows

A new report finds that a majority of Americans think the U.S. should be a world leader in science, but Democrats increasingly believe other countries are catching up

On Thursday NASA chief Jared Isaacman said the experience of the returned Crew-11 will be used to prepare for future human spaceflight—including to the moon

The four members of Crew-11 are on their way back to Earth after one of them became unwell with an unknown condition

The Clean Air Act has saved millions of lives, but the EPA will stop calculating those benefits for at least some proposed regulations

Horses that were presented with cotton pads soaked in a scared human’s sweat showed more signs of fear themselves

Experts have said that if previously reported cuts to federal grants had come to pass, they would have exacerbated the U.S.’s addiction crisis

Scientists have sequenced the genome of the long-extinct woolly rhinoceros from remains found in the stomach of a naturally mummified Pleistocene wolf pup

The U.S. space agency and the Department of Energy will work together to build a fission reactor on the lunar surface in the next four years

Mathematical tools from string theory are giving scientists a new way to study the networking of neurons

New clues hidden inside T. rex bones suggest that the carnivore lived longer lives than we thought

Robert F. Kennedy, Jr.’s Centers for Disease Control and Prevention has slashed childhood vaccine recommendations in the middle of respiratory virus season

A food scientist debunks the vilification of seed oils on social media and explains what research says about them.

Global warming surpassed 1.5 degrees Celsius for the past three years, meaning Earth is currently on track to breach the Paris climate agreement by the end of the decade