Scientists once thought that humans must have two million genes to account for all our complexity. But since sequencing the human genome, we've learned humans only have about 19,000 to 25,000 genes - ...

Researchers have made the first detailed map of the regions into which the brain of one of the most closely-related organisms to the vertebrates is divided and which could give us an idea of what our ...

What did the last common ancestor of the vertebrate animals—a very small, soft-bodied marine organism that lived about 600 million years ago—look like? While the portrait is still emerging, a new ...