End of humanity? Blow‑by‑blow account of what would happen if the Yellowstone supervolcano erupted now

Around 631,000 years ago, a geological blink of an eye, catastrophe unfolded in what is now northwestern Wyoming, U.S. During what is thought to have been a series of immense volcanic eruptions, life within hundreds of kilometers of the blasts was shattered. Ash was dispersed across much of North America, and the effects were felt worldwide. This was a super-eruption of the massive volcanic system located in what is now Yellowstone National Park.