An anticlockwise twist reveals the hidden interior mechanism and a Fisher Space Pen refill, enabling the pen to write at an angle, even upside down. The refill comes from the USA, but the pen is ...

Satellites and rocket stages burning up on reentry are now depositing more aluminum into Earth’s upper atmosphere than ...

That missing tape measure is costing you more time than you think.

From tool-using chimpanzees to puzzle-solving capuchins, the primate world is packed with surprising brainpower. But how do the planet’s cleverest monkeys and apes really compare with human intelligen ...

Autonomous cars need to see the world around them, kind of like we do, but with a lot more gadgets. They use a bunch of ...

For over 150 years, a rule of thumb dating back to the French mathematician Pierre Ossian Bonnet has been accepted in surface ...

Our editors tested two popular glucose monitors to determine which is the best for improving ​​diet, sleep and exercise habits.

From the Oura Ring to the Apple Watch to the Google Pixel — here's what the science really says about the accuracy of their health data ...

More than a century before quantum mechanics was born, Irish mathematician William Rowan Hamilton stumbled onto an idea that would quietly foreshadow one of the deepest truths in physics. While ...

People and computers perceive the world differently, which can lead AI to make mistakes no human would. Researchers are working on how to bring human and AI vision into alignment.