By the end of the Triassic dinosaurs overwhelmed ecosystems worldwide.
There was a lot of change throughout the Triassic Period.
The variety and domination of life on Earth underwent significant changes throughout this period, which was bounded by extinctions. As a result, several well-known animal groupings that would later govern the world for millions of years first appeared.
Reptiles that resembled mammals, like Lystrosaurus, ruled the early Triassic.
We still don't completely understand what led to the Permian-Triassic extinction disaster. There have been various possibilities put out, including an unidentified asteroid impact, large-scale volcanic eruptions in what is now Siberia, the release of methane from the ocean's depths, sea level change, rising aridity, or a combination of several of these.
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