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Weird ‘Time Crystals’ Are Made Visible at Last

2025 summer was Spain's warmest on record: Weather agency

A spacecraft could explore 3I/ATLAS to learn more about 'cosmic noon'

From beer to useful fats and medicines

When politics drive entrepreneurial innovation, digital payments see impact

New images reveal unexpected polarization flips near M87's supermassive black hole

Economic hardship linked to higher risk of partner violence against women

Researchers develop data-guided simulations for more accurate modeling of random systems

Partial solar eclipse at the bottom of the world closes out the year's sun and moon spectacles

Study shows number of childless women in the US continues to rise

Evidence of cosmic impact discovered at classic Clovis archaeological sites

Chameleons shine in black for better camouflage

Green and brown persist—study reveals the role of color in driving evolution in frogs

Shark chomps on seal close to Massachusetts beaches

Study calculates value of Virginia coastal wetlands at $90 million

Humans get as attached to horses as they do to pets

Santa Monica's waves have turned a bright pink: How can the dye job improve water quality?

A new book explores the link between film giant Kodak and the atomic bomb

Earth's history written in the stars: Zircon crystals reveal galactic influence

If quantum computing is answering unknowable questions, how do we know they're right?

Strange signals at absolute zero hint at dark matter’s secrets

Can vertical farms really feed the UK sustainably? New study weighs climate costs and benefits

Making atoms self-magnify reveals their quantum wave functions

Good immune health may come at the expense of chronic inflammation

The Quiet Demise of Breakthrough Starshot, a Billionaire’s Interstellar Mission to Alpha Centauri

The Problem with Billionaire Science

Science Crossword: A Little Light Launch

Readers Respond to the May 2025 Issue

Poem: ‘Love Letter from Photograph 51’

October 2025: Science History from 50, 100 and 150 Years Ago

New Hope in Alzheimer’s Research: A Special Report

New Alzheimer’s Blood Tests Promise Early Detection but No Clear Path Forward

Math Puzzle: Find the Unknot

How Three Fusion Reactor Designs Could Power Tomorrow

How Racial Discrimination and Pollution Increase Alzheimer’s Risk

How Birds Began Migrating to the Arctic to Breed

Global Landslide Risk Rises as the Planet Warms

Fast Fashion Is a Bad Look for the Environment

Dead Trees Hide a Complex World Crucial to Forest Ecology and Climate

Controversial New Alzheimer’s Treatments Gain Ground despite Serious Side Effects

Contributors to Scientific American’s October 2025 Issue

Can Dogs, Cats and Other Pets Truly Improve Your Health?

Can Diet and Exercise Prevent Alzheimer’s Disease? What the Research Says

As Memory-Care Facilities Close, America Faces a Crisis in Alzheimer’s Care

A New Generation of Alzheimer’s Treatments, Explained in Graphics

These Aren’t Your Pharoah’s Mummies

The Dinos’ Demise Gave Rivers Their Shape

Long Lives Helped Early Humans Thrive

Why so many young kids with ADHD are getting the wrong treatment

New drug could be first to stop deadly fatty liver disease