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- What If? Lab What if volcanoes stopped erupting? Volcanoes build new land, like the island of Surtsey near Iceland, and their rock slowly breaks down into some of the richest soil on Earth. Over millions of years, gases from volcanoes even helped give Earth its air and oceans. Imagine every volcano going quiet, and follow what might change.
- What If? Lab What if the continents stopped moving? Earth's outer shell is broken into giant plates that creep along just a few centimeters a year. Where they meet, they build mountains and cause earthquakes and volcanoes. Imagine the plates stopped: rain, ice and wind would keep wearing the land down, but nothing would push new mountains up.