Get ready for an IQ explosion.
• Some arctic seals can find the exact spot where they were born even after spending five years out at sea.
• Hummingbirds shake themselves dry in the rain, similar to the motion a dog uses to do the same with its fur. The birds shake using 30 times the force of gravity to complete the drying.
• The longest underground river, running for almost 3,800 miles at a depth of nearly 2½ miles, is beneath Brazil, flowing west-to-east from the Andean foothills to the Atlantic coast.
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