08 fevereiro 2018

Ancient Irrigation System Rediscovered in Northwest China

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Help Kids Eat Healthy

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The First Good Dog

The ancient Egyptian dog Abuwtiyuw is one of the earliest domesticated animals whose name we know. He was a guard dog to royalty, had an elaborate funeral usually reserved for upper-class humans, and lived during Egypt’s Sixth Dynasty (2345–2181 BCE).

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Splitting Slope Streaks


This image from NASA's Mars Reconnaissance Orbiter (MRO) shows streaks forming on slopes when dust cascades downhill.

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Bow Tie Moon and Star Trails


On January 31, a leisurely lunar eclipse was enjoyed from all over the night side of planet Earth, the first of three consecutive total eclipses of the Moon. This dramatic time-lapse image followed the celestial performance for over three hours in a combined series of exposures from Hebei Province in Northern China. Fixed to a tripod, the camera records the Full Moon sliding through a clear night sky. Too bright just before and after the eclipse, the Moon's bow tie-shaped trail grows narrow and red during the darker total eclipse phase that lasted an hour and 16 minutes. In the distant background are the colorful trails of stars in concentric arcs above and below the celestial equator.

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