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The most dangerous pollutant might not even be known yet.

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epKJ TIL the mantis shrimp punches its prey with more force than a .22-caliber bullet.
JYdjQ TIL that medieval forests near inhabited areas were actually more managed then most forests today and functioned more like semi-wild gardens.
Oxp6 TIL that due to their similar protein composition, blood can be used as an egg substitute in baking and making ice cream.
R77El And what really makes curly hair different than straight hair?
XEBMk TIL Presidents since 1929 have generally been wealthier than presidents of the late nineteenth and early twentieth centuries. With the exception of Harry S. Truman, all presidents since this time have been millionaires.