The main point of this article is “They Thought”(Follow the Science)
(www.sfgate.com)
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…So in 2009, a new program began that administered birth control vaccines to female bison, with hopes of stabilizing the population at about 150 animals. The vaccine was thought to be reversible, but over a decade later, its impacts are still being felt. The last calf born on the island was in 2013,…