"Pleistocene cougars had a ‘more generalized’ dietary behavior," says Larisa DeSantis. "Specifically, they likely killed and often fully consumed their prey, more so than the large cats that went extinct." (Credit: Tambako the Jaguar/Flickr)
Top StoryVanderbilt University

Did cougars survive by not being picky eaters?

Though the species of black widow in the study is not generally cannibalistic, Maydianne Andrade explains that, "it's important to remember that when a female eats a lot of prey, she's less likely to eat a potential mate." Above, a male black widow spider. (Credit: Ken Jones/U. Toronto)
Top StoryUniversity of Toronto

Male black widow spiders pick fatter virgin mates

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