Massive blobs of 'fire ice' lurks beneath the ocean. We know almost nothing about them.
June 27, 2019 at 11:18 AM EDT
There's a giant trove of frozen methane, or "fire ice," locked beneath our ocean's surface. If released, it could trigger tsunamis, landslides and release huge amounts of carbon into our already-warming atmosphere. But we have almost no idea how much there is or where to find it.