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Trump plan to give start-ups plutonium harvested from Cold War–era nuclear weapons is risky, experts say

The ‘age of gravitational astronomy’ is here

A quantum computing system’s perfect randomness could keep your secrets safe

The secret to immortality might be a sea cucumber

‘Universal’ aging clocks offer new clues to longevity

NASA’s Jared Isaacman unveiled the first moon base rovers and landers

Gigantic ‘little red dot’ threatens to upend cosmic history

Tiny quantum computers could help create giant telescopes

This sci-fi novel asks—can what you will never know kill you?

Iran threats expose the aging fleet that repairs undersea Internet cables

How doctors will handle abortions if mifepristone telehealth access is banned

Are humans really selfish? Rewriting the rules of civilization

Anthropic asks religious thinkers to help shape Claude as pope warns about AI

How the mathematician Gödel proved that not everything can be proven

Why a ‘heat dome’ over Europe is shattering temperature records right now

China just launched a bunch of fake human embryos into space on a new research mission

A toothless, beaked, bipedal crocodile cousin roamed Earth 200 million years ago

How mathematicians use Minecraft to calculate pi

Experts explain how sunscreen really works—and why better ones may be coming soon

Tiny alienlike blue octopus discovered lurking off the Galápagos Islands

Ocean census reveals more than 1,100 new species

The universe could have 18 possible shapes

SpaceX launches Starship V3—the world’s most powerful and tallest rocket ever

Why lawyers keep citing fake cases invented by AI

Far side moon photos reveal hidden lunar minerals in brilliant color

Earth’s molten outer core is behaving in chaotic, unexpected ways

Rare Ebola-causing Bundibugyo virus is uniquely challenging to treat. Here’s why

Span wants to turn homes into mini data centers

What will happen if the Milky Way and Andromeda galaxies collide?

What is E15 fuel? Why higher-ethanol gasoline could raise summer smog levels

Bixonimania’—the fake illness that AI fell for

SpaceX scrubs launch of Starship V3—the tallest and most powerful rocket ever built

Hidden structural features inside Egypt’s Great Pyramid may have helped it withstand earthquakes, new study finds

Hantavirus found in shocking number of Pacific Northwest rodents

JWST sees partly cloudy skies on a distant, giant exoplanet

Scientists discover why gold doesn’t ‘rust’

A new study says you need 10 hours of exercise a week. Can that really be possible?

NOAA predicts quieter Atlantic hurricane season for 2026—but the Pacific is another story

Trial of next-gen weight-loss drug retatrutide brings it one step closer to FDA approval

AI just solved an 80-year-old ‘Erdős problem,’ and mathematicians are amazed

Can math predict the end of humanity? Inside the ‘doomsday argument’

Watch SpaceX launch Starship V3—the tallest and most powerful rocket yet

Daddy longlegs are actually bloodthirsty killers—of frogs

Start-up reveals ‘artificial egg’ to resurrect extinct birds, but scientists say the work misses the point

Screen time limits can protect children’s health, U.S. surgeon general advisory says

An Ebola outbreak is spreading fast. Should you be worried?

These bizarre fossils represent some of the earliest moving, sexually reproducing life ever discovered

Vaccines for Bundibugyo Ebola virus outbreak are being developed, but none are ready yet

NASA’s Psyche captures gorgeous Mars crescent photo on way to asteroid

The Colorado Avalanche is dominating the NHL—Denver’s high elevation could be the reason