The tuatara isn’t actually a lizard. It’s the last survivor of a 250 million year old group of reptiles that mostly went extinct with the dinosaurs. It doesn’t have a penis, and ironically, that’s made it a linchpin for understanding how penises evolved in vertebrates.
You're looking at a 3D facial reconstruction of a 410 million year-old armoured fish called Romundina. It's one of the first creatures on this planet to feature a characteristic many modern animals take for granted — a face.
You're looking at a rare, fish-like creature known to marine scientists as amphioxus. Widely known for being not only faceless, but brainless, these small, elusive creatures are some of the most bizarre ocean-dwellers we've ever discovered.
This map shows extinction hot spots for vertebrates (mammals, birds, and amphibians). Brown areas and blue areas are regions of intense die-offs. It's from a massive research study published today, showing nearly one-fifth of vertebrates are threatened with extinction.