Over the past decade, there’s been no shortage of media coverage when it comes to the expanding waistlines of humans around the world. We eat too much. We don’t move enough. But here’s the thing. We’re not alone. Animals are getting fatter too. And not just the ones that we feed too much or fail to walk around the block often enough. So what gives? From ProPublica’s David Epstein: Do these chemicals make me look fat?

+ If you’re interested in this topic, you’ll definitely want to check out David Berreby’s piece in Aeon: The Obesity Era.