What makes plants grow to a certain size? From the tiniest cells to whole leaves, roots, and stems, growth has to be ...

Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

The longevity of Jobs’ 10-minute design session suggests the approach worked. The calculator survived nearly two decades of ...

This paper describes the eccentricity, amplitude, phase shift, angular momentum, polarization, radial path, and orbital ...

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