The quest to drill the world’s deepest hole
11:34 05 July 2012
Since the mid 20th century, geologists have been drilling ever deeper into the Earth’s crust on ocean and on land, but they still haven’t come close to the mantle. A bold plan is now under way to reach the planet’s viscous interior. Richard Fisher
Read more: “Mission to the mantle: Drilling through Earth’s crust“
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