Jules Verne would have dug this plan: drill into the sea floor, through kilometres of the planet’s rocky crust to penetrate the denser underlying mantle. It is one of geology’s classic quests, conceived almost 60 years ago, at the peak of the plate-tectonics revolution. Since then, many have attempted it and failed. But an expedition starting this month is taking up the challenge once again.
A hole that deep “would be the window into things we have never seen before”, says Benoît Ildefonse, a geologist at the University of Montpellier in France.
Read more: nature.com
There's probably a good reason that's separated from the surface, I get a bad feeling about this.