Science

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What Are Zombie Cells—and How They Drive Aging Science

What Are Zombie Cells—and How They Drive Aging

Senescent 'zombie' cells stop dividing but refuse to die, flooding tissues with inflammatory signals that accelerate aging and disease. Scientists are...

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How Printed Artificial Neurons Talk to Real Brain Cells Science

How Printed Artificial Neurons Talk to Real Brain Cells

Scientists can now print flexible electronic neurons that generate signals realistic enough to activate living brain tissue, opening the door to cheap...

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How Tornadoes Form—and Why the U.S. Gets the Most Science

How Tornadoes Form—and Why the U.S. Gets the Most

An explainer on the atmospheric mechanics behind tornado formation, why the United States experiences more tornadoes than any other country, and how m...

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How Ancient DNA Analysis Works—and What It Reveals Science

How Ancient DNA Analysis Works—and What It Reveals

Scientists extract and sequence degraded genetic material from bones thousands of years old, rewriting human history and revealing lost populations, e...

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How Mammals Stopped Laying Eggs—the Long Road Science

How Mammals Stopped Laying Eggs—the Long Road

All mammals descend from egg-laying ancestors called synapsids. Here's how the transition from leathery eggs to live birth unfolded over 300 million y...

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How Bioluminescence Works—Nature's Cold Light Science

How Bioluminescence Works—Nature's Cold Light

Bioluminescence lets organisms produce their own light through a chemical reaction between luciferin and luciferase. From deep-sea creatures to firefl...

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How Synchrotrons Work—the World's Brightest Light Science

How Synchrotrons Work—the World's Brightest Light

Synchrotron light sources accelerate electrons to near light speed, producing X-rays billions of times brighter than the sun. These massive machines p...

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How Coral Bleaching Works—and Why Reefs Are Dying Science

How Coral Bleaching Works—and Why Reefs Are Dying

Coral bleaching occurs when rising ocean temperatures break the symbiotic bond between corals and the algae that feed them, turning reefs white and th...

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What Is the Green Sahara—and Why Did It Vanish? Science

What Is the Green Sahara—and Why Did It Vanish?

The world's largest hot desert was once a lush landscape of lakes, rivers, and grasslands. Scientists call this era the African Humid Period, and new...

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How Bacteria Share Antibiotic Resistance—Gene by Gene Science

How Bacteria Share Antibiotic Resistance—Gene by Gene

Bacteria swap resistance genes through horizontal gene transfer—conjugation, transduction, and transformation—spreading drug-proof traits across speci...

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How AI Drug Discovery Works—From Target to Trial Science

How AI Drug Discovery Works—From Target to Trial

Artificial intelligence is reshaping how new medicines are found, compressing timelines from over a decade to as little as 18 months and boosting earl...

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Did Mars Have an Ocean? What the Evidence Shows Science

Did Mars Have an Ocean? What the Evidence Shows

Scientists have debated whether Mars once held a vast northern ocean for nearly four decades. New geological evidence, including a continental shelf '...

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