The island of Mauritius is blanketed in volcanic rock, which is (geologically speaking) pretty young at nine million years of age. It’s strange that the zircon crystals, which are so much older, are embedded in this youthful rock, but Ashwal has an idea about how they got there. Nine million years ago, when volcanic magma oozed out Earth’s mantle, it passed through the buried lost continent before continuing to the surface and spewing lava everywhere, explains Ashwal. The zircon crystals, too tough to melt, simply hitched a ride up. They’ve sat on the surface ever since, waiting patiently to tell scientists Mauritia’s secret.