The ancient continent was discovered via a gravity-mapping ... They’ve been able to use its gravity measurements to map out the Earth’s lithosphere, an outer section of the planet’s internal ...

An ancient slab of Earth's crust buried deep ... The slab's pull has created giant "drips" that hang from the underside of the continent down to about 400 miles (640 kilometers) deep inside ...

You see, every continent has some underwater bits in addition to the landmass which we live upon and these are the most tricky parts to map out and gain a full picture ... which was once thought to ...