Deepest hole on the Planet Permanently Sealed After Finding 2-billion-year-old Fossil

It was a race

The ambitious goal to dig towards the center of the earth started with a competition between the USA and the USSR to conquer the subterranean world. We all know the space race between the two nations to conquer outer space but little was known about another race to dig as far into the Earth’s crust as they possibly could.

You may think that dirt and rocks are not that compelling compared to the mystery of the cosmos but the Earth’s crust leads the way to the mantle – the mysterious inner layer that makes up 40% of Earth’s mass. What could that 40% be made of?