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'Microlightning' between water droplets could have sparked life on Earth. Here's how
The building blocks of life on Earth may have been fueled by tiny sparks hopping between water droplets.
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Aurora art teacher won an international NASA contest. Now his drawing is orbiting earth in the International Space Station.
"They wanted drawing ideas of what life would be like in space," Thad McCauley ... McCauley said the astronaut doodle will return to Earth at some point after it's made a full orbit.