There’s all sorts of intriguing stuff hidden beneath the Earth’s surface, from massive oceans to water leaking directly into the planet’s core – the latest discovery, though, might be the most interesting of all.

However, it's only been a decade since scientists discovered a huge ocean that's three times larger than all the seas above the land. Since that's the case, we're very lucky that this huge ocean, which was only discovered back in 2014,

Fragments of Planet Theia appear to be buried deep beneath Africa and the Pacific Ocean. And now more evidence has been found deep in the moon via NASA's GRAIL craft