The space rock that slammed into Chelyabinsk, Russia in February likely narrowly avoided a collision with another asteroid earlier, or perhaps flew too close to the sun, a new study suggests.
A new robotic sensor can detect algal blooms before contaminated food reaches dinner plates.
Epigenetic changes in nerve cells keep memories in place.
Astronomers have discovered an Earth-size planet so close to its star that a year lasts just 8.5 hours, making it one of the fastest alien planets ever seen.
A design student returned to his native Mexico City after college in the United States to help the megalopolis overcome its water crisis.
An early Jurassic earthquake left its mark in the Navajo Sandstone, which forms the famous red cliffs of Zion National Park in Utah.
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