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Immunologist Zachary Rubin explains how the World Health Organization decides which strains of influenza end up in annual flu vaccines.

Are we the only rational thinkers? New research on our primate cousins suggests otherwise

Seismometers picked up the ferocious winds and waves of Hurricane Melissa, showing how the tools can be used to better understand storms today and those from the past

“The only countries that will really learn more if [U.S. nuclear] testing resumes are Russia and, to a much greater extent, China,” says Jeffrey Lewis, an expert on the geopolitics of nuclear weaponry

An analysis suggests Nanotyrannus is a separate, smaller dinosaur that lived alongside T. rex, settling a 30-year debate

Some scientists are concerned that the Trump administration will use “junk science” when reviewing mifepristone’s safety record

What would the world look like if we changed the value of pi? Whether in the real world or a game environment, the answer is complex

Female Aedes mosquitoes signal that copulation can proceed by subtly extending their genitalia

Hurricane Melissa’s powerful winds and drenching rains devastated Jamaica. But is its wrath a sign that we need a new designation for monster storms?

Researchers simulated the effects that different web decorations had on vibrations, adding fresh insight to a decades-old debate about the function of these structures

Russian leader Vladimir Putin claimed his nation conducted a successful flight of a nuclear-powered cruise missile. Here’s how that missile might work

Separate brain processes cope with moment-to-moment versus big-picture experiences, which helps explain how parenting both increases and decreases aspects of well-being

Experiments suggests H9N2 has adapted to human cells, but cases of person-to-person transmission haven’t been reported yet

TikTok’s U.S. spin-off could reshape its algorithm and the way culture is curated online.

These images of Hurricane Melissa show the Category 5 storm in all its power

A nearly perfect alignment of factors has enabled Hurricane Melissa to become one of the most intense Atlantic storms ever recorded

These rare samples, uncovered on the moon by China’s Chang’e 6 mission, might help to reveal secrets of how the solar system evolved

New peer-reviewed research reporting strange lights in the pre-space-age sky is sparking curiosity and controversy

Theorists have found that a “warm” version of cosmic inflation is consistent with known physics, linking it to the hunt for dark matter

Civets enrich coffee beans they eat and excrete with two fatty acids often used in dairy products, study finds