Around 55 million years ago, India and China collided. Some time after that - geologists disagree on exactly when this happened - the Himalayan-Tibetan plateau rose skyward, creating the rugged landscape that today attracts tourists and mountain climbers from all over the world.
Now a new study has constructed the evolution of various frog species found across eastern Asia, giving geologists a genetic clock by which they can time the upheaval of the region known as "the roof of the world."
In a new article in the journal Proceedings of the National Academy of Sciences, researchers led by David Wake of the University of California, Berkeley detailed how four different waves of divergence among frog species - the point when new species are created from a common ancestor - can be explained by four major tectonic events in the region.
The uplift caused by India slamming into the Eurasia tectonic plate created natural barriers that isolated the frogs and led to a diversification in species over time. Wake explained this process in an interview with UC Berkley News: