U.S. news The National Park Service turns 100 years old this month. Fifty-nine U.S. National Parks cover almost 52 million acres across 27 different states. Last year, they saw a record 305 million visitors.
They're starting with glaciers and working their way up to space What has lasers, a torpedo-shaped body, and is capable of tunneling where no one has tunneled before? VALKYRIE, one of the 'cryobots' that
The dead shall shine again Don’t throw out that seemingly lifeless battery—it’s not dead yet. A brand-new alkaline battery cell has an electric potential of about 1.5 volts, which drops as the juice runs