Scientists have known for decades that some animals use the Earth's magnetic field to help them navigate, kind of like an internal GPS. How they do it, though, remains unclear. NPR's Nate Rott reports ...
12don MSN
Worms as particle sweepers: How simple movement, not intelligence, drives environmental order
When observing small worms under a microscope, one might observe something very surprising: the worms appear to make a ...
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