About 500 million years ago, not a single creature had a skull. Over time, these bony plates evolved into the structural marvels that vertebrates—animals with spinal cords, aka you, me, and your pug, ...

Movies like "Disclosure Day" and "Project Hail Mary" renew our fascination with extraterrestrials and the idea that humankind is not alone in the universe.

Among the many strange biological wonders Charles Darwin observed in his time, one haunted him above all. “‘The eye, to this day, gives me a cold shudder,” he admitted in a letter to an American ...