Dinosaurs: A Concise Natural History -

Trackways and nesting sites (like those of the duck-billed Maiasaura ) indicate that many species traveled in herds and exhibited complex parental care.

Roughly 66 million years ago, the reign of the non-avian dinosaurs ended abruptly. A massive bolide impact in the Yucatan Peninsula, combined with intense volcanic activity from the Deccan Traps, triggered a global "impact winter." Photosynthesis collapsed, and three-quarters of all species perished. Dinosaurs: A Concise Natural History

Dinosaurs serve as the ultimate case study in deep time. They remind us that the Earth’s climate and inhabitants are in a constant state of flux. By studying their rise and fall, we gain perspective on our own place in the natural world and the fragile balance that sustains life on a changing planet. Trackways and nesting sites (like those of the