Bore hole inspection.

20:46
What did the Soviets discover in the Kola Superdeep well at a depth of 12,262 meters?

44:37
Borehole Drilling

24:51
Titan Sub Disaster Is Way Worse Than You Thought

3:10:23
I Transformed a WWII-Era Stone Ruin into a Dream Home – You Won’t Believe the Results!

25:41
Smithville - The Strongest Tornado in Recorded History

20:38
How Inuit Sleep At -84°F (-64°C) Without Gas/Electricity

30:29
Ingenious Construction Workers That Are at Another Level

16:11