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R2K's High Power Rocketry Blog 
High Power Rocketry Posts
Rocketry Club: Skywatchers/ROMAR
Burning natural gas sinkhole (2011-05-16)
"Darvaza, Turkmenistan - While drilling in 1971, geologists tapped into a cavern filled with natural gas. The ground beneath the drilling rig collapsed, leaving a large hole with a diameter of about ... [Read More]
