Earth looked much different not just millions, but even decades and centuries ago. Many animal species that once existed are nowhere to be found. From human activity to climate change, new animals ...

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For more than 50 years, scientists have been freezing living cells from endangered species. Here’s how the Frozen Zoo® is ...

Johannes M. Luetz does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

The animal is considered the world's rarest primate.