Ravishankar

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Alaska Scientists on Climate Data Quest Get Rare View of Parks

<i>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. To recognize the centennial of the system protecting these American treasures, NBC News will feature</i> …

National Parks

Educator makes classrooms more homely for students

Laser-Armed Cryo Robots Could Explore Europa For Alien Life

They're starting with glaciers and working their way up to space<p>What has lasers, a torpedo-shaped body, and is capable of tunneling where no one has tunneled before? VALKYRIE, one of the 'cryobots' that is paving the way towards exploring icy moons like Europa in the future.<p>Jupiter's moon Europa is …

Astronomy

How To Build A Flashlight That Runs On Dead Batteries

The dead shall shine again<p>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 out. The voltage eventually becomes too low to power most devices, but there’s still energy …

Arduino