Humans Have Wiped Out 85 Percent Of Mammals On Earth, Study SaysHumans make up only a tiny minority of the life on Earth, however a new study claims people are responsible for wiping out more than half of the planet's lifeforms.
Study: Monogamy Evolved As Way For Male Mammals To Protect Young Only a few species of mammals are monogamous, and now two scientific teams think they've figured out why they got that way. But their answers aren't exactly romantic.

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