Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.
New Scientist on MSN
Static electricity can remove frost from windows using little energy
High-voltage copper plates can remove up to three-quarters of frost from a surface, while using much less energy than ...
A pulse of light sets the tempo in the material. Atoms in a crystalline sheet just a few atoms thick begin to move—not ...
What can a marriage counselor help with? A marriage counselor can help a couple develop skills to strengthen their relationship. Before getting married, or during the course of a marriage, a marriage ...
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