Scientists have reclassified giraffes into four distinct species, up from one. Conservationists say this greater understanding of giraffe taxonomy will allow for targeted conservation efforts ...

It is undoubtedly one of the most majestic creatures in the animal kingdom. But it turns out there's not just one species of giraffe. In fact, there are four.

The Supreme Court applies the structural provisions of the Constitution by relying on an overarching framework of "separation of powers." Its cases reflect two distinct visions of the doctrine.

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