Lazy Hedgehogs/Nomads/ Bear Hibernation/ Largest Snowball Fight

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          Some hedgehogs sleep through the entire winter, breathing so little that they appear to be dead. 

           Nomads created ice skates made of bone at least 4, 000 years ago.

            During hibernation, a black bears heart rate can drop from 40→50 beats per minute to just 8 beats per minute.

          

              Almost 6,000 people participated in the worlds largest snowball fight.

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