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

How a 1950s study of social class and mental illness in New Haven changed the way people thought about mental health.

Some of the models used to forecast everything from financial trends to animal populations in an ecosystem are incorrect, ...

Here is a close look at the common- versus differential-mode voltage and instrumentation amplifier (IA) topologies.

The Philippines has been one of the most dynamic economies in the East Asia and Pacific region. Its economic dynamism reflects increasing urbanization, a large and young population, and strong ...