Stegoceras “Steel Skull” validum
It’s a question we’ve all asked ourselves, watching nature “red in tooth and claw”: Which animal, in all evolution’s bounty, would win in a head-butting fight?
We don’t have to wonder anymore. In a new study, researchers have rounded up the likely contenders for head-butting champ, living or dead, ranging from long-extinct domeheaded dinosaurs to modern-day musk oxen. Since some animals had an obvious advantage, what with being currently alive, the scientists settled for a virtual throwdown. They used CT scans to suss out the precise shape and size of each creature’s noggin, then relied on computer models to see how they’d hold up when the animals went head to head.
What monkey mothers eat has a large impact on how skittish their offspring act in stressful situations like stranger danger–or the presence of a Mr. Potato Head in their cage.
According to researchers, even normal monkeys find the toy’s large eyes to be “mildly stressful.” But baby monkeys from mothers who were fed a high-fat diet (over 35 percent of calories from fat, modeled after a typical American diet) had a much stronger reaction to an encounter with the spud man, and also spazzed in the presence of an unknown human.
The study, presented at the Society for Neuroscience annual conference, found that in stressful situations, the female offspring were more anxious and the males more aggressive, explains LiveScience:
The insight comes from McGill University undergraduate Frank Kachanoff. He wondered if the sight of food would incite men’s defensive desires, much like a dog aggressively protecting its food bowl, he explained in a press release:
“I was inspired by research on priming and aggression, that has shown that just looking at an object which is learned to be associated with aggression, such as a gun, can make someone more likely to behave aggressively. I wanted to know if we might respond aggressively to certain stimuli in our environment not because of learned associations, but because of an innate predisposition. I wanted to know if just looking at the meat would suffice to provoke an aggressive behavior.”