For the first half of the 20th century, one of the most important firearms in the U.S. military arsenal was the water-cooled ...

The annexed engravings are views of a machine for plastering the walls of houses, invented by Isaac Hussey, of Harveysburg, ...

A nonprofit uses VR headsets to offer inmates practical scenarios like job interviews alongside travel experiences, providing ...

Devices for sleep apnea keep airways open to improve breathing during sleep. PAP machines supply air through a mask to maintain open airways overnight. Oral appliances hold the tongue or jaw in place ...