Hot, Hotter, Hot: Climate seesawed during dinosaur age

Dinosaurs, too, endured climate change. Although scientists had speculated that the world some 120 million years ago was unvaryingly hot, climate fluctuated dramatically, a new report argues. Twice during a 250,000-year period in the reign of the dinosaurs, tropical sea-surface temperatures varied by 6°C, the findings suggest. That’s twice as much variability as is known to have occurred at any other time in history.