Humans have steadily driven the world's biggest land mammals into extinction for thousands of years, and we're not done — the cow could soon be the largest one left, according to a new study.
NBC News reported that the study, published Friday in the journal Science, concludes that human activity, not climate change, is what drove animals like the mammoth and saber-toothed tiger extinct.
Today, hunting leaves little hope for saving large, wild mammals from extinction, according to the researchers led by biologist Felisa Smith of the University of New Mexico.
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"Wild mammals are in decline globally because of a lethal combination of human-mediated threats, including hunting, introduced predators and habitat modification," the researchers wrote.