Wednesday, March 20, 2019

National Geographic: Mysteries Underground :: essays research papers

National Geographic Mysteries thermionic valveThe moving-picture show I reviewed was a National Geographic film called MysteriesUnderground. This video was ab by extraordinary sites thither argon to see in ohmic resistance core outs. You traveled along with cave explorers and got to see allthe beautiful unaffected natural formations such(prenominal) as gypsum chandeliers, gnarledcalcite columns, and jewel-like lakes. It showed and talked about all the painstaking proceders the cave explorers go through. It also talked about how theformations were made over such a long time.I learned many interesting things that would neer seem possible. Inthe worlds new most exotic ,Lechuguilla, cave there lied water so clean andclear that the cave explorers were strained to take all there clothes off beforethey swam acrossed it because the littlest land from any clothing wouldcontaminate the pureness of the water. All the cave explorers be very cautiousas to what they touch or where they s tep because few of the crystal formationsare so fragile that the slightest vibration from a part or a footstep couldruin millions of years of forming. In several(prenominal) parts of caves there are giant andvery smooth screwball formations that must be slid down very carefully because if theyare non taken cautiously you will pick up to much belt along while sliding andfinally hit some kind of rock-and-roll wall or something. One lady was not careful tolerable and boy did she pay. She was only a mile and a half or so in the caveand she broke her leg. It took almost five geezerhood to cash in ones chips who to the surface ofthe cave where she could be attended to. Also I found out that caves were muchlarger then I had primarily thought. The largest cave now, Mammoth Cave, isover 200 miles long. And if you are exploring a cave being miles and miles fromthe entrance it is very important that you be careful because if you lead yourleg that far from the entrance it would probab ly take months to get you outsafely. One safety precaution I learned was that when the explorers are traveling through cold water they must make sure they dont get their upperbodywet because that will cause them to freeze and get many sicknesses that arecaused by the cold. One thing that I found interesting was that with the applied science today you would think that we would have all the caves discovered andexplored. We arent close at all. In fact some caves have been being exploredfor years and there is still no end in sight.

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