Darkened varnish obscures Goya's signature in a 1771 masterpiece, according to a new analysis using terahertz waves
Ever wondered what fuel fires potatoes out of a cannon the fastest? The US Air Force now has the answer
With 3-D printing poised to go mainstream, will we soon all be able to print a gun?
Nobody knows what exploded over Siberia in 1908, but the discovery of the first fragments could finally solve the mystery.
A materials scientist has created the world's toughest fiber using a mechanism based on a slip knot.
A lab at Harvard is developing materials with potentially revolutionary optical characteristics.
A cheap way to alter ammonium nitrate fertilizer renders it unusable in IEDs.
Physicists have finally solved the problem of how pearls form almost-perfect spheres: they rotate as they grow.
Nobody has been able to trap electromagnetic waves inside a metamaterial and then release them again. Until now.
Brazil nuts would rise to the top of a container of mixed nuts on Mars and the Moon, but more slowly than on Earth, say physicists