On this day in 1970, Soviet engineers began drilling the deepest man-made hole ever dug.See <a href="https://omnystudio.com/listener">omnystudio.com/listener</a> for privacy information.

On this day in 1970, Soviet engineers began drilling the deepest man-made hole ever dug. See omnystudio.com/listener for privacy information.

On this day in 1970, Soviet engineers began drilling the deepest man-made hole ever dug.See <a href="https://omnystudio.com/listener" rel="noopener noreferrer">omnystudio.com/listener</a> for privacy information.

Russian engineers begin drilling the world's deepest hole - May 24th, 1970

From the desk of “Stuff You Missed in History Class,” “This Day in History Class” quickly recounts a tidbit from today’s events in history.

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Russian engineers begin drilling the world's deepest hole - May 24th, 1970

Russian engineers begin drilling the world's deepest hole - May 24th, 1970