The World Economic Forum announced that there will be more plastic than fish in our oceans by as early as 2050.
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The Lake Merritt Wild Duck Refuge became the first US wildlife sanctuary.
The first killer whale calf was born in captivity at Marineland in Los Angeles, California.
Sputnik 2 soviet spacecraft burned up, returning through Earth's atmosphere.
The Philadelphia Zoo opened. At the time, it was the only zoo in the 'New World.'
Christopher Columbus sighted manatees for the first time ever.
