The extinction of dinosaurs some sixty-five million years ago is one of the greatest biological catastrophes in the history of our planet. Yet in recent years, paleontologists have turned up increasing evidence that ancestors of one group of dinosaurs still fly among us: birds. Join Cathy Forster, one of the few female paleontologists working today, on an expedition to Madagascar in search of clues to the mystery of bird evolution.

With three hearts and blue blood, its gelatinous body unconstrained by jointed limbs or gravity, the octopus seems to be an alien, an inhabitant of another world. It's baggy, boneless body sprouts eight arms covered with thousands of suckers—suckers that can taste as well as feel. The octopus also has the powers of a superhero: it can shape-shift, change color, squirt ink, pour itself through the tiniest of openings, or jet away through the