00:00Did you know the difference between a quarry and a mine?
00:02In this footage, a miner lights a fuse to blast rock underground.
00:07The fuse burns at a steady speed to give him time to get clear before the explosion.
00:12But why go through all that?
00:13Because instead of chipping through miles of rock by hand,
00:16tons of ore are turned into rubble in seconds.
00:19Miners have to descend up to 400 to 4,000 meters underground,
00:24breathing stale air and dealing with temperatures up to 70 degrees Celsius.
00:28To keep from cooking, they pump tons of ice slurry into the ventilation system
00:33up to 5,000 tons of ice a day.
00:35And if you think all mines are just 500 meters deep, think again.
00:39The Mponeng Gold Mine in South Africa goes down almost 4 kilometers.
00:43A quarry, on the other hand, is a giant pit on the surface
00:46where rock is mined from above ground.
00:49Here they also use heavy blasts to break up stone.
00:51Massive machinery drills and crushes giant boulders,
00:54while haul trucks with tires 4 meters tall haul away tons of material.
00:59The biggest quarry in the U.S. is Bingham Canyon,
01:02which is about 970 meters deep.
01:05Unfortunately, in both mines and quarries, dust destroys lungs within just a few years.
01:10go. We can
01:10Yep.
01:10continue. Yeah.
01:10Let'swww!
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