Kola Superdeep Borehole: The Deepest Hole Ever Made

A video about a really deep hole. But it's actually interesting. Simon's Social Media: Twitter:   / simonwhistler   Instagram:   / simonwhistler   Simon's Other Channels: TodayIFoundOut:    / todayifoundout   TopTenz:    / toptenznet   Biographics:    / @biographics   Visual Politik:    / @visualpolitiken   Highlight History:    / @highlighthistory   Geographics:    / @geographicstravel   Business Blaze:    / @brainblaze6526