Scientific American

This “extraordinary” event was likely caused by seismic waves bouncing off Earth’s core, researchers found

A new method that detects whether bones have been burned reveals Homo erectus brought fires into caves far earlier than previous evidence had suggested

The first participant has been treated in a landmark clinical trial of cellular reprogramming, which aims to rejuvenate aging cells

The quest to approximate irrational numbers with fractions reveals hidden patterns, surprising hierarchies and enduring mathematical mysteries

Construction of the Deep Synoptic Array is about to start in rural Nevada. It will reveal untold galaxies in stunning detail and help explain how they form and grow

This operation opens the door to treating more people living with HIV who have end-stage organ disease

How did we get here?

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The James Webb Space Telescope has found nearby brown dwarfs masquerading as far-distant galaxies. The discovery reinforces how, in astronomy, what you see isn’t always what you get

Protein-packed diets add excess nitrogen to the environment through urine, rivaling pollution from agricultural fertilizers

From booed hydration breaks to cooling-gel vests, teams are trying everything to keep their players from overheating. Physiologists—and one World Cup team doctor—say feeling cooler is different than cooling the body

Everyday viral infections may be quietly reshaping the body’s network of molecules that support cells and tissues in ways that can raise cancer risk over time

The great American brain drain could define science for a generation

Astronomers may have found the remains of two long-dead stellar siblings

Some mathematicians have predicted when humanity’s downfall might occur—though the circumstances are unspecified

A galaxy appears to be missing the invisible substance thought to hold such objects together, further challenging long-held assumptions about how galaxies form

These ruins, located just five kilometers from Stonehenge, likely laid the groundwork for religious rites celebrating the longest and shortest days of the year

A cold, cherry-blossom-hued exoplanet supports bizarre clouds chock-full of salts

On steering the path forward for research and innovation

Next summer, NASA’s Lucy spacecraft will start sidling up to several asteroids near Jupiter. On its way there, it has studied another space rock up close

Even if you aren’t going to be within the path of totality, you can still watch the solar eclipse as it happens with Scientific American

The effort to pull some 900 ocean-monitoring buoys and sensors from the water drew backlash from scientists and lawmakers

This partnership marks the latest foray into space exploration for Relativity Space, which aims to build cheap, reusable rockets

On Thursday Knicks fans are flocking to Manhattan for a ticker-tape parade. But where did ticker tape even come from?

Tropical Storm Arthur is the first named storm of the Atlantic hurricane season and will bring heavy rains and potential flash flooding to the Southeast

Galapagos sharks have been spotted scrubbing off parasites with help from manta rays

People are increasingly turning to AI for mental health support—but its design is “antithetical” to mental health care, experts say

Extremely curved spacetime can warp cause and effect, creating channels for backward communication

Early research suggests that some mental health conditions could stem from metabolic disorders. If so, the findings could change how we treat mental illness

Mikhail Verbitsky was detained at an Armenian airport last Thursday on charges of inciting terrorism

Some countries have seen a stark decline in academic freedom over the past decade

It’s a complicated time to be a young scientist in America. Lessons from history can tell us what the future might hold

Why the human brain can't fathom what it means to be a trillionaire

Scientists have modeled the potential size of this current outbreak, which some experts think could become one of the worst Ebola epidemics on record

Fable 5 was built to help with advanced cybersecurity work. Its sudden shutdown highlights a dilemma at the heart of AI security: the same tools can aid both defenders and attackers

Researchers have created the first high-resolution global map of the extent of one of Earth’s largest—and least visible—living networks