Two million years of rain sparked the dinosaur's reign

The theory states that the Carnian Pluvial extinction event was triggered by a massive volcanic eruption that lasted 5 million years. Eventually, the Wrangellian eruptions caused global warming that heated the oceans — and the ocean water evaporated much faster, causing 2 million years of incessant rain across the planet. They say this over-abundance of rain turned the Earth from a dry shrubland into a wet hothouse filled with rain forests." "The extreme humidity and different plants of these rain forests caused serious challenges for the animals that dominated the Ladinian period." Eventually, the eruptions stopped, the rain stopped, and the earth became much drier again. Leaving a world filled with dinosaurs and vegetation that suited them.