The n-queens challenge dates back to 1869. After working on the problem for about 5 years, mathematician Michael Simkin has an almost definitive solution.

The US has made a dent in Russian cyber criminal gangs. But tensions with Russia and the shadowy nature of hacking keep the threat level high.

Feeling like you've really thought through all the different options makes us feel more confident in our choices, researchers report.

With new smart sutures, a battery-free, wireless sensor can detect and transmit information about wounds from deep surgical sites.

Carpets of tiny hairs called cilia that line the inside of the fallopian tubes give sperm the extra boost they need to be super swimmers, a new study shows.

Sensors that gather data on how people use a prosthesis versus a transplant in everyday life after a traumatic hand loss could help personalize treatment.

New results "suggest that Earth, like the other rocky planets Mercury and Mars, is cooling and becoming inactive much faster than expected."