Politics
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Scientists Create Elephant Stem Cells in the Lab
The results could shed light on why the animals rarely get cancer. But the researchers’ ultimate goal of bringing back woolly mammoths is still aspirational.
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Seeing Stars, Sperm and Millions of Spawn After a Valentine’s Day Rendezvous
Sunflower sea stars, a species of giant starfish, are critically endangered. Researchers tinkered with sperm in an aquarium lab to help them reproduce.
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Atom Bombs in Space Are Back to Scare Us Again
Russian President Vladimir V. Putin may find that a nuclear weapon in orbit is less useful for war than intimidation.
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This article was published prematurely.
This article was published prematurely.
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An Ocean Moon Thought to Be Habitable May Be Oxygen-Starved
A new study suggests that the amount of the element on the moon of Jupiter is on the lower end of previous estimates.
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Why It’s So Challenging to Land Upright on the Moon
Two spacecraft have ended up askew on the lunar surface this year. It is easier to tip over in the weaker gravity on the moon than you may imagine.
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On the Trail of the Denisovans
ORIGINS On the Trail of the Denisovans DNA has shown that the extinct humans thrived around the world, from chilly Siberia to high-altitude Tibet — perhaps even in the Pacific islands. Researchers at Hebrew University reconstructed the face of a ...
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Daddy Longlegs Have Been Hiding Extra Eyes From Us
The arachnids, which are not spiders, were thought to have only two eyes, compared with many more on spiders.
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It’s the Cat’s Meow but You Just Don’t Understand
A study suggests that humans often misinterpret a pet’s signals; even purring doesn’t guarantee a contented cat.
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Why Leap Day Is Really About Party Planning
Judah Levine, top time researcher, explains how Feb. 29 was invented to keep the major holidays from colliding.