WTF Fun Fact – Mankind Mostly Explores Outwards

Mankind has probed nearly 14 billion miles outward from Earth via Voyager I, but has only drilled 7.5 miles into Earth itself. WTF Fun Facts

Source:
https://www.space.com/17688-voyager-1.html & https://edition.cnn.com/2012/10/01/tech/mantle-earth-drill-mission/

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