From Billions to Zero in 50 Years: The Extinction of the Passenger Pigeon
Martha was a very lonely bird. She had once been part of a pair, with her male counterpart George, but he had died several years before. So, for the final years of her life, Martha sat in her one-bird cage alone. The Cincinnati Zoo offered a thousand dollar reward (about $23,000 today) to anyone who could track down a mate […]
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