pratyush vaidya

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Watch the New Year's Skies for a Green Comet

Comet Lovejoy is brightening faster than expected, putting on a show you can see for yourself this holiday season.<p>Just in time for the holidays, the skies are serving up a special cosmic gift: a brightening comet that may not have been in our part of the solar system for nearly 12,000 …

China's Remote Fortresses Lose Residents, Gain Tourists

Massive earthen structures once sheltered clans from warlords and bandits. Can they be prototypes for "green" buildings?<p>HEKENG, China—Count the <i>tulou</i>.<p>It started like a game. How many of these strange, fortress-like structures could I tally from a vehicle window? They were so big, looming like …

Week's Best Space Pictures: Sun Flares, Webb Prepares, and Fogo Scares

A battered moon shows its age, while the sun acts up and a volcano erupts, in the week's best space pictures.

Stunning Time-Lapse Reveals Auroras and Earth From Space

Astronaut Alexander Gerst made the video from International Space Station.<p>As if Santa attached a GoPro camera to his sleigh, a new video reveals the Earth as few have seen it.<p>Published this week, the time-lapse shows stunning views of the Earth, sunrises, clouds, lightning, auroras, stars, and the …

Brain

Learn more about the most complex organ in the human body.<p>Making sense of the brain's mind-boggling complexity isn't easy. What we do know is that it's the organ that makes us human, giving people the capacity for art, language, moral judgments, and rational thought. It's also responsible for each …

Four 2015 Energy Ideas 'Back to the Future' Got (Almost) Right

Hoverboards, flying cars, and auto-fueling are closer than you think, and garbage energy is here.<p>Energy is so cheap and easy in 2015 that we all have flying cars and robot gas attendants. That's not the reality as of New Year's Day, of course, but rather the "future" depicted in the hit 1989 movie</i> …