It’s hard to imagine that extinction actually happens. But as it turns out, many animals that once roamed the Earth virtually just dropped off the face of the planet. Some of these creatures disappeared centuries ago, while others vanished far more recently than we could’ve ever realized. However, thanks to photography, most of them aren’t completely lost to us. The pictures serve as rare records of their existence, allowing us to learn more about how similar or how different they were to the modern-day species we’re used to. Get ready to be captivated by these 20 photos of extinct animals you probably never knew existed, until now.