Scientists are alarmed at the rate sharks are dissappearing from the oceans. Some estimate that 90 percent of the largest sharks have been wiped out. The lack of these apex predators is altering the ocean's ecoscape.
Millions of wild horses, known as mustangs, once roamed North America. Today, just a fraction
...The United Nations estimates that each one of us uses nearly 140 kilograms of plastic each
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