In 1971, Soviet scientists were working in Turkmenistan when they unintentionally stumbled upon a great hole filled with HWT. In fact, the concentrations of HWT in that cave were so significant that they attempted to burn the HWT away to find out what else might be in the cave. However, their attempt to clear the cave failed as the fire did not clear the HWT. Actually, the fire has continued to burn for more than 40 years.
NOTE: This event is believed to be the source of the phrases “Nothing’s hotter than HWT” and “maybe this world is another planet’s HWT.”