Starting Again
The researchers abandoned the previous borehole, not to be defeated, and started again from a depth of 23,000 feet. And the drilling had reached a record 40,230 feet by 1989, an unbelievable 7.5 miles. Encouraged, those involved in the project were hopeful about the future, anticipating that by late 1990, 44,000 feet would pass through the hole.
Starting Again
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An Unexpected Change
Perhaps more impressively, the borehole was expected to hit its 49,000-foot target by as early as 1993. But under the remote Russian tundra, something unexpected was lurking. And bizarrely, as the drill inched closer and closer to the core of the Planet, a totally unexpected change took place.
An Unexpected Change
