The Mantle
Then the thick shell makes way for the unclear inner layer called the mantle. Nearly 40% of Earth’s mass is represented by this deeper stratum. As regards scientists and researchers, this led to an intriguing trip.

The Mantle
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Project Mohole
By initiating Project Mohole, the United States took the lead in 1958. It is near Guadalupe, Mexico. A team of engineers drilled through the Pacific Ocean seafloor.

Project Mohole