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The key to unraveling the mysterious cause of Alzheimer's disease may not lie in the recesses of the human brain, but rather in the weightless expanses of outer space.

SABOL Experiment Details:
nasa.gov/mission_pages/station/research/experiments/1374.html

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NASA has launched SMAP, a new satellite to study water, not in oceans or lakes but in the soil beneath our feet. This often overlooked repository of water can have big effects on weather, climate, drought and agriculture.

smap.jpl.nasa.gov/

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Researchers are using a pair of robots to examine the strange way fluids slosh and bubble on the International Space Station

nasa.gov/mission_pages/station/research/experiments/980.html

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Check out NASA's Geminid Meteor Shower page! nasa.gov/connect/chat/geminids_2014.html

Earth is passing through a stream of debris from "rock comet" 3200 Phaethon, source of the annual Geminid meteor shower. Forecasters expect as many as 120 meteors per hour when the shower peaks on Dec. 13-14.

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Arctic and Antarctic sea ice are both affected by climate change, but the two poles of Earth are behaving in intriguingly different ways.