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Neuroscientists pinpoint how smells bring back childhood memories

Smell can bring back vivid childhood memories—the so-called "Proust's madeleine" phenomenon—and neuroscientists now think they know why

Avocado flowers switch sex daily—now we know why

New work explains how avocado trees coordinate a complex reproductive strategy, switching every day between male and female

The ultimate science summer reading list

SciAm books editor Bri Kane shares her favorite science books for every summer mood

Fauci Invokes the Fifth Amendment, Refusing to Answer Senate Committee Questions

SHERYL GAY STOLBERG

The panel’s chairman, Rand Paul, has long accused Dr. Fauci of funding research that triggered the Covid pandemic and lying about it to Congress — charges Dr. Fauci denies.

A unique cellular trick may explain octopus intelligence

A newly discovered change in ribosomal RNA makes protein production more precise, potentially safeguarding these cephalopods' complex nervous systems

Hundreds of ancient, never-before-seen ‘earthworks’ discovered in the Amazon

Many of these structures date to around C.E. 100–300, during the time of the Aquiry civilization, and may have been used for ceremonial purposes

Rescue mission to save NASA’s Swift space telescope is imperiled in orbit

A private spacecraft launched to boost the decaying orbit of NASA's Swift Observatory is now suffering from potentially mission-ending malfunctions

Astronomers spot best-yet example of a wandering supermassive black hole

Giant black holes adrift in deep space are normally invisible—unless they're dining on stars

Should We Make Daylight Saving Time Permanent?

LYNNE PEEPLES

More light at the day’s end comes at a price: much later winter sunrises across much of the U.S. Scientists have documented consequences for public health and the economy.

Trump Administration Is Repurposing Federal Land for A.I. Data Centers

BRAD PLUMER

In the latest example, the Energy Department will convert a shuttered Cold War-era uranium enrichment facility into a data center campus and gas plants.

Bizarre new material discovered in Hiroshima bombing debris

he extreme conditions of atomic bomb explosions create "uncontrolled microexperiments" that, in Hiroshima, forged a never-before-seen metallic alloy

How to Predict the Weather in Our Era of Freakish Storms

HEIDI JULAVITS

I didn’t want to have to depend on a weather app to know when the storms are coming.

How to Tell if a Giant Manta Is Pregnant? Give Her an Ultrasound.

ALEXA ROBLES-GIL

Scientists managed to confirm pregnancies in three giant mantas with underwater ultrasound scans, offering clues to the animals’ elusive reproductive habits.

Spacecraft will swarm asteroid Apophis during fateful 2029 Earth flyby

Space agencies around the globe are coordinating missions to visit the asteroid Apophis during a close encounter with Earth in 2029

Bipartisan Anger Grows at Pentagon’s Delayed ‘Forever Chemicals’ Cleanups

HIROKO TABUCHI

Hundreds of bases are contaminated with PFAS, which are linked to low birth weight and other risks. Politicians from both parties are demanding explanations.