The forces of rotation caused red hot masses of stones to be torn away from the Earth and to be thrown into the ether, and this is the origin of the stars.

— Anaxagoras 428 BC

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Scientific American is the essential guide to the most awe-inspiring advances in science and technology, explaining how they change our understanding of the world and shape our lives.
Updated: 23 hours 16 min ago

What it’s like being stuck in a hantavirus quarantine for six weeks

Tue, 05/19/2026 - 2:45pm

Scientific American spoke to one of the people who are currently being monitored for possible hantavirus infection at the National Quarantine Unit in Nebraska

Categories: Astronomy

‘Sensational’ proof topples decades-old geometry problem

Tue, 05/19/2026 - 12:15pm

The sudden resolution of a well-known conjecture highlights the growing adoption of AI as an assistant in high-level mathematics

Categories: Astronomy

New NASA Hubble image captures a rare, turbulent galaxy

Tue, 05/19/2026 - 10:45am

The new image shows the galaxy NGC 1266, a transitional object with a clutch of young stars that likely collided with a smaller galaxy 500 million years ago

Categories: Astronomy

Scientists race to develop Ebola drugs as outbreak surges

Tue, 05/19/2026 - 10:00am

Clinical trials for treatments against Ebola Bundibugyo virus are ‘in a strong position’ to be launched quickly in the Democratic Republic of the Congo and Uganda

Categories: Astronomy

Math puzzle: Fix the matchstick equation

Tue, 05/19/2026 - 7:00am

Fix the matchstick equation in this math puzzle

Categories: Astronomy

Female beast hunters battled leopards in ancient Rome

Tue, 05/19/2026 - 6:30am

Mosaic depictions of a weapon-wielding female gladiator are the first physical evidence showing women in ancient Rome could be skilled beast hunters

Categories: Astronomy

NASA dreams of a nuclear power plant on the moon. Here’s why

Tue, 05/19/2026 - 6:00am

To build its moon base, NASA needs a lot of power

Categories: Astronomy

Which problems will quantum computers solve—and when?

Tue, 05/19/2026 - 6:00am

Quantum computing could lead to revolutions in cryptography, materials design and telecommunications. But fulfilling those promises could be many years away

Categories: Astronomy

A real quantum leap

Tue, 05/19/2026 - 6:00am

Sometimes science does make our world turn upside down

Categories: Astronomy

A field guide to quantum computer qubits

Tue, 05/19/2026 - 6:00am

Here are six ways to build a quantum computer

Categories: Astronomy

New high‑resolution map transforms what we know about Roman roads and the Roman Empire

Tue, 05/19/2026 - 6:00am

A massive digitization project has nearly doubled the known extent of the first continent-scale road network

Categories: Astronomy

Quantum computing is reaching its make-or-break moment

Tue, 05/19/2026 - 6:00am

Will computers based on quantum physics really change the world?

Categories: Astronomy

How commercial satellites are changing modern warfare

Tue, 05/19/2026 - 6:00am

Commercial satellites can now watch much of Earth in near-real time. Militaries are learning new ways to fool them

Categories: Astronomy

Readers respond to the February 2026 issue

Tue, 05/19/2026 - 6:00am

Letters to the editors for the February 2026 issue of Scientific American

Categories: Astronomy

New ways to keep from losing muscle on Ozempic

Tue, 05/19/2026 - 6:00am

Ozempic and just getting older take off muscle. New therapies could retain it

Categories: Astronomy

Helion Energy is building a fusion power plant. Can its technology deliver?

Tue, 05/19/2026 - 6:00am

This company says its pulsed plasma machine will deliver electricity to the grid by 2029. Some physicists warn that its promises are outrunning what the technology has proved

Categories: Astronomy

The Riemann hypothesis is a million-dollar math problem hardly anyone is trying to solve

Tue, 05/19/2026 - 6:00am

The intimidating legacy of the scariest problem in mathematics

Categories: Astronomy

Poem: ‘Horseshoe Crab’

Tue, 05/19/2026 - 6:00am

Science in meter and verse

Categories: Astronomy

Science crossword: At the same time

Tue, 05/19/2026 - 6:00am

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

Categories: Astronomy

June 2026: Science history from 50, 100 and 150 years ago

Tue, 05/19/2026 - 6:00am

Door-building spiders; a new quantum liquid

Categories: Astronomy