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Inuit people such as these Greenlanders have evolved to be able to eat fatty foods with a low risk of getting heart disease. Olivier Morin/AFP via Getty Images

If evolution is real, then why isn’t it happening now? An anthropologist explains that humans actually are still evolving

We are indeed still evolving, though it can be hard to tell because it happens over generations and often involves things you can’t see, such as what foods different people are able to digest.
This close-up illustration shows what one of the twin ESCAPADE spacecraft will look like conducting its science operations. James Rattray/Rocket Lab USA/Goddard Space Flight Center

NASA goes on an ESCAPADE – twin small, low‑cost orbiters will examine Mars’ atmosphere

The twin spacecraft Blue and Gold could open a new era in space exploration and planetary science, powered by commercial partnerships and innovations.
Closely examining the claims companies make about a product can help you separate hype from reality. Flavio Coelho/Moment via Getty Images

New technologies like AI come with big claims – borrowing the scientific concept of validity can help cut through the hype

Scientists across all fields make various types of claims about their innovations. Validity tests check whether they deliver on what they promise.
The use of motion data is expanding from fitness and rehabilitation to general health. Todor Tsvetkov/E+ via Getty Images

Turning motion into medicine: How AI, motion capture and wearables can improve your health

Motion data is well known for improving athletic performance and rehab. Thanks to AI, it’s also turning motion into another vital sign for general health.
A child may temporarily have baby teeth, adult teeth and gaps all at once. BSIP/Universal Images Group via Getty Images

Why do people have baby teeth and adult teeth?

A pediatric dentist and an anthropologist explain how baby teeth and adult teeth help humans chomp their food over a long lifespan.
The planetary radar, built in 1960 in Crimea, from which the Morse signal ‘MIR, Lenin, USSR’ was sent in November 1962. National Radio Astronomy Observatory Archive

SETI’s ‘Noah’s Ark’ – a space historian explores how the advent of radio astronomy led to the USSR’s search for extraterrestrial life

Radio astronomy opened up the universe for scientists. They could map new elements across galaxies and also search for signals from extraterrestrial civilizations.
An Akkadian cylinder seal, circa 2350-2150 B.C.E., depicts a contest scene. The image on the right shows the impression the seal would make. Gift of Nanette B. Kelekian, in memory of Charles Dikran and Beatrice Kelekian, 1999/Metropolitan Museum of Art

Signatures meant more in Mesopotamia than they do now − what cylinder seals say about ancient and modern life

Cylinder seals were intimately tied to their owner, showcasing their identity, beliefs and social status.
Amazon Web Services, hosted in data centers like this one in Virginia, supports thousands of websites, apps and online services – but not during its recent DNS outage. Nathan Howard/Getty Images

What is DNS? A computer engineer explains this foundational piece of the web – and why it’s the internet’s Achilles’ heel

The Domain Name System, like most pieces of the internet, was designed to be distributed across many computers. Concentration on few cloud providers is changing that.