NASA astronaut Don Pettit's latest photography from the International Space Station showcases not only his visual prowess, but also his engineering skills.

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The best monocular devices on the market offer a lightweight and portable alternative to telescopes and binoculars. When you purchase through links on our site, we may earn an affiliate commission ...

During the early sixties, MEXE developed a multipurpose buried shelter system called the MEXE Shelter, or Field Shelter Mk2 ...

A heat pump uses electricity to transfer heat from a cool space to a warm one ... This home appliance uses fuel -- often natural gas, which consists primarily of the fossil fuel methane ...