A cistern was used in ancient times as a place to store water. They're often used where there is little rain or where a well couldn't be dug properly. They often serve the same purpose today; yet, they must be kept away from algae and mosquitos.
Lava:
Lava is what erupts from a volcano. It's molten and liquid-like, but it dries into lava rock which some cisterns were made of. There are many famous volcano eruptions during which the lava wiped out entire civilizations.
Mount Vesuvius:
Mount Vesuvius is the volcano that destroyed the town of Pompeii. Arguably, this is one of the most famous volcano eruptions. This eruption released 100,000 times the thermal energy that was released with the atomic bomb that hit Hiroshima and Nagasaki.
Atomic bombing of Hiroshima and Nagasaki:
These events were the only atomic bombings to date. They were released during World War II by the United States on Japan, their enemy during the war. Many people were killed by the initial blast of the bombs, but others succumbed to burns and more yet had children with birth defects.
(Portuguese Cistern, web source: Wikimedia)
No comments:
Post a Comment