55 million years ago, as the Earth heated up, many mammal species got smaller. Could the same thing happen again with human-induced global climate change?
Suppose your ancestors had lived in darkness for almost a million years. This is the world of the Mexican blind cavefish.
Our presence could be causing the brains of non-human animals to grow.
Despite your best chemical defenses, cockroaches are evolving to bug you even more.
Scientists believe human brain development is the result of genetic mutations that occurred millions of years ago.
Ever wondered why we humans don't have spots or stripes? Well, maybe you haven't, but it is interesting that so many creatures are multicolored but we are not.
Unlike their contemporaries the dinosaurs, crocodiles managed to survive whatever killed off their Jurassic cousins. So what accounts for their longevity?
New fossils unearthed in China cast light on the evolution of today's fliers.
The protein myoglobin provides new clues to the evolution of diving in mammals.
The box jelly has evolved a central nervous system unlike any other animal on Earth.