
Physics
Eyelashes help fling water from our eyes
The “micro-ratchet” structure and curvature of eyelashes could help keep eyes clear of rain, sweat and tears.
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The “micro-ratchet” structure and curvature of eyelashes could help keep eyes clear of rain, sweat and tears.
This clock measured how gravity changes the passage of time in different places — even spots just one millimeter apart.
A handful of rules can describe the route some object repeatedly takes around another in space. Calculating that path, however, can be quite complex.
Four fundamental forces control all interactions between matter, from the smallest subatomic particles to the largest structures in the universe.
Quantum sensors like this one could monitor magma beneath volcanoes or uncover archaeological artifacts.
Learn why these terms aren’t the same and which to use where. And should you report your results in kilograms? Pounds? If in doubt, try using newtons.
Researchers have developed a camera the size of a coarse grain of salt that takes amazingly clear photos.
Mass shows how much an object resists speeding up or slowing down when force is applied — a measure of how much matter is in it.
On TV, people in space walk around like they’re on Earth. How can science give real astronauts artificial gravity? Spin right round, baby.
A toy called a light mill inspired researchers to invent a new way to fly. They’re using light to levitate small nanotube-coated discs.