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Two Möbius Strips Combine to Create a Bizarre Object That Only Exists in 4D

Igloos on Mars? How Future Astronauts Could Use Ice to Survive

10 Mind-Blowing Brain Discoveries from 2025

Excerpt—The Great Shadow, by Susan Wise Bauer

Jared Isaacman Confirmed to Head NASA at Pivotal Moment for the Space Agency

Scientists Are Baffled by This Bizarre Lemon-Shaped Exoplanet

New Views of Saturn’s Moon Titan and Jupiter’s Moon Europa Complicate Ocean Worlds Theory

Scientists Denounce Trump’s Plan to Kill Crucial Atmospheric Science Center

Why a Critical Orca Community Is Slipping toward Extinction

Strange Cosmic Blast May Be First-Ever Superkilonova Observed

Ancient Bees Burrowed Inside Bones, Fossils Reveal

The Arctic Is in Dire Straits, 20 Years of Reporting Show

New Flu Variant May Be Triggering Spike in Severe Disease

RFK, Jr.–Backed Lyme Disease Conspiracy Theory May Be Probed under New Bill

Scientists Devise New Plan to Study the Most Exciting Rock on Mars

Math Puzzle: Wrangle the Rectangles

How to See Interstellar Comet 3I/ATLAS as It Swings by Earth One Last Time

What Your Sleep Profile Reveals about Your Health

These Orcas Are on the Brink—And So Is the Science That Could Save Them

The Hype behind Expensive Probiotic Supplements

Science Crossword: Pointing South

Science Carries On. Here Are Our Top Topics for 2026

Readers Respond to the September 2025 Issue

Poem: ‘Large Hadron Collider,’ ‘Maxwell’s Demon’ and ‘Music for the Heat Death of the Universe’

Mysterious Bright Flashes in the Night Sky Baffle Astronomers

Meet Your Plastic Pal

Meet Your Future Robot Servants, Caregivers and Explorers

January 2026: Science History from 50, 100 and 150 Years Ago

Interoception Is Our Sixth Sense, and It May Be Key to Mental Health

Heart and Kidney Diseases, plus Type 2 Diabetes, May Be One Illness Treatable with Ozempic-like Drugs

Global Warming Could Skew Reptile Sex Ratios and Lead to Extinctions

RNA May Be Common throughout the Cosmos, New Study Suggests

Getting a COVID Vaccine while Pregnant Slashes Risk of Premature Birth, Major New Study Finds

How Rising Rates of Uninsured Children Will Increase Pediatric Cancer Deaths

Videos Show Hummingbirds Jousting Like Medieval Knights in Rare Mating

2025 Nears Climate Heat Record, Mpox Variant Discovered, and Hobbit Extinction Explained

Trump Officials Keep Comparing the U.S.’s Vaccine Schedule to Denmark’s. They’re Missing the Point

How Conifers and Christmas Trees Secretly Shaped U.S. History

Why Humanoid Robots and Embodied AI Still Struggle in the Real World

New Cell Transplant Therapy Restores Insulin Production in Patient with Type 1 Diabetes

What Is 'Spoofing'? How a U.S.-Seized Oil Tanker Reportedly Tried to Evade Detection

Health Experts Slam Possible FDA ‘Black Box’ Warning for COVID Vaccines

Photos Reveal Moths Sipping Tears from a Moose

What Time Is It on Mars?

AI as the New Empire? Karen Hao Explains the Hidden Costs of OpenAI’s Ambitions

COVID Vaccines Slashed Kids’ ER Visits by 76 Percent, Study Finds

U.S. Approves First Device to Treat Depression with Brain Stimulation at Home

Before Flowers Existed, Ancient Cycad Plants Lured Insects with Heat

U.S. Sunscreens Aren’t Great. The FDA Could Soon Change That

Measles Outbreaks Accelerate as U.S. Inches Closer to a Disease Tipping Point