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"Amazing Facts Thread"

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For every 10m in depth the pressure in sea water is raised by approximately one atmosphere. At sea level that pressure translates to 14.7 psi at 5000m it is roughly 479 atmospheres or 7304.16 psi.

Calculation tool for pressure in sea water: http://www.calctool.org/CALC/other/games/depth_press

 

Next topic: sound transmission in water

 

Apparently sound transmits faster in water than in gases! who knew?

 

 

Next topic: Angel Falls

 

camoham

 

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Apparently sound transmits faster in water than in gases! who knew?

 

 

camoham

 

 

Me too! I have been told that the sounds/song of the humpback whale can be heard 100's of miles away if the conditions are right.

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Angel Falls or Salto Ángel (indigenous name: Kerepakupay Vená) is the world's highest free-falling waterfall at 3,212 feet with an uninterrupted drop of 2,648 feet lying in the Canaima National Park, Venezuela at 5°58′03″N, 62°32′08″W. It is situated on the Churún River, an affluent of the Carrao. Curún in indigenous Pemón language means "thunder."

 

Angel Falls is located in the Guayana highlands, one of the five topographical regions of Venezuela. It plunges off the edge of a tepui, or table-top mountain, called Auyan Tepui (“Devils Mountain”). It is 500 feet wide at its base and in total is 15 times higher than America's Niagara Falls.

 

Angel Falls is one of Venezuela's top tourist attractions, despite its remoteness and the absence of roads leading to nearby villages. One of the world's great natural wonders, Angel Falls inspires feelings of awe in the hearts of those who make the journey.

 

Sir Walter Raleigh described what was possibly a tepuy (table top mountain), and he is sometimes said to have been the first European to view the Angel Falls, but these claims are considered far-fetched.[8] Some historians state that the first European to visit the waterfall was Fernando de Berrío, a Spanish explorer and governor from the 16th and 17th centuries.[9] Later on, they were indeed spotted in 1912 by the Venezuelan explorer Ernesto Sánchez La Cruz, but he did not publicize his discovery. They were not known to the outside world until American aviator Jimmie Angel flew over them on 16 November 1933 on a flight while he was searching for a valuable ore bed.[10][11]

 

Returning on October 9, 1937, Angel tried to land his Ryan Flamingo monoplane El Río Caroní; atop Auyan-tepui, but the plane was damaged when the wheels sank into the marshy ground, and he and his three companions, including his wife Marie, were forced to descend the tepui on foot. It took them 11 days to make their way back to civilization, but news of their adventure spread, and the waterfall was named Angel Falls in his honor.

 

 

Angel's planeAngel's plane remained on top of the tepuy for 33 years before being lifted out by helicopter. It was restored at the Aviation Museum in Maracay and now sits outdoors on the front of the airport at Ciudad Bolívar.

 

The first recorded Westerner to reach the river that feeds the falls was Latvian explorer Aleksandrs Laime, also known as Alejandro Laime to the native Pemon tribe. He made the ascent of Auyan-tepui in 1955. He also reached Angel's plane on the same trip, 18 years after the crash landing. He gave the river feeding the falls the name Gauja after a river in Latvia, but the Pemon-given name of the river, Kerep, is still widely used.

 

Laime also was the first to clear a trail that leads from the Churun River to the base of the falls. On the way, there is a viewpoint commonly used to capture the falls in photographs. It is named Mirador Laime ("Laime's Viewpoint" in Spanish) in his honor. This trail is used now mostly for tourists, to lead them from the Isla Ratón camp to the small clearing.

 

The official height of the falls was determined by a National Geographic Society survey carried out by American journalist Ruth Robertson in 1949.[12]

next topic: poison dart frogs

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Poison dart frogs are named such because Indians used to aggravate them causing them to secrete a poisonous fluid which they then rubbed on their darts.

 

Next topic: the internet

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The Internet is a global system of interconnected computer networks that use the standard Internet Protocol Suite (TCP/IP) to serve billions of users worldwide. It is a network of networks that consists of millions of private, public, academic, business, and government networks of local to global scope that are linked by a broad array of electronic and optical networking technologies. The Internet carries a vast array of information resources and services, most notably the inter-linked hypertext documents of the World Wide Web (WWW) and the infrastructure to support electronic mail.

 

Most traditional communications media, such as telephone and television services, are reshaped or redefined using the technologies of the Internet, giving rise to services such as Voice over Internet Protocol (VoIP) and IPTV. Newspaper publishing has been reshaped into Web sites, blogging, and web feeds. The Internet has enabled or accelerated the creation of new forms of human interactions through instant messaging, Internet forums, and social networking sites.

 

The origins of the Internet reach back to the 1960s when the United States funded research projects of its military agencies to build robust, fault-tolerant and distributed computer networks. This research and a period of civilian funding of a new U.S. backbone by the National Science Foundation spawned worldwide participation in the development of new networking technologies and led to the commercialization of an international network in the mid 1990s, and resulted in the following popularization of countless applications in virtually every aspect of modern human life. As of 2009, an estimated quarter of Earth's population uses the services of the Internet.

 

The Internet has no centralized governance in either technological implementation or policies for access and usage; each constituent network sets its own standards. Only the overreaching definitions of the two principal name spaces in the Internet, the Internet Protocol address space and the Domain Name System, are directed by a maintainer organization, the Internet Corporation for Assigned Names and Numbers (ICANN). The technical underpinning and standardization of the core protocols (IPv4 and IPv6) is an activity of the Internet Engineering Task Force (IETF), a non-profit organization of loosely.affiliated international participants that anyone may associate with by contributing technical expertise.

 

Next Topic: Drift Boats.

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The true drift boat design was the result of two Eugene (OR) area boat builders; Woody Hindman and Tom Kaarhus during the 1930's. These two were prolific boat builders for many years. They developed good reputations for the boats they produced, and their boats were sought after by many of the best guides of that era. A few of the boats they built 30 or 40 years ago are still in use. Hull designs were named for rivers on which they were used, primarily the Rogue and McKenzie. Eventually the differentiation between the two became blurred, resulting in two major styles of drift boats -- the McKenzie or Rogue (depending on who is doing the calling), and the Rapid Robert.

 

As a novice boat builder I took this excerpt from a drift boat building book I have (also the same thing is on the Claka Craft site).

 

 

Next topic: Mark Twain

 

Steve

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Mark Twain, the penname of Mr Samuel Clemens, is a river navigational term used to "mark" depths. If I'm not mistaken, as I often am, a twain is 12 ft. Most riverboats had a "spotter" on each side of the bow to navigate vessels through narrows, sand bars, and other navigational hazards.

 

Next topic: Frog Jumping Contests

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Frog jumping is a competitive pastime in which frogs compete to jump certain distances. Frog jumping contests are held in small communities scattered around the United States, as part of the folk culture.

 

next topic: The first tanks of WWI

 

Great topic, jan!!! :headbang:

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First tanks built in World War I moved at very slow speeds most could not go faster than 5 or 6 miles per hour. Guns were typically slightly modified field cannons and multiple machine guns were mounted on the sides of the vehicle. Although they were monstrous contraptions they were not very effective and only had limited success on the battlefield. They were prone to getting stuck in the trenches they were traversing and throwing tracks.

 

The first tank attack was on the Somme and consisted of 36 tanks that broke through the German lines and allowed the British to push the Germans back almost 5km which was unheard of in this war. So the tank was considered a great success because it brought mobility back to a stagnant battlefield.

 

Next subject P-38 Lightnings

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In 1937, the U.S. Army put out a requirement for a high-altitude interceptor capable of 360 MPH at 20,000 feet and full-throttle enduraance of one hour at that altitude. Lockheed's design team, headed by H. L. Hibbard, include Clarence "Kelly" Johnson. With no contemporary engine that could meet the specifications, the Lockheed team settled on a twin engine design.

 

next topic: Otto Carius

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Lieutenant Otto Carius was a German Heer tank commander during World War II and is credited with destroying more than 150 tanks.

 

 

Next subject: Gravity

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As for the science behind the action, we know that Isaac Newton defined gravity as a force -- one that attracts all objects to all other objects. We know that Albert Einstein said gravity is a result of the curvature of space-time. These two theories are the most common and widely held (if somewhat incomplete) explanations of gravity

 

next topic: bronze age

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The bronze age was a historical landmark in the industrial development of man. It was the first time mankind began to incorporate metal smelting into crafting tools and weapons. Skeletons dating to this era have been noted for high levels of copper and mercury in thier bones, thought to be a result of metal smelting and early mining endeavors. A collection of spear tips and hand axes from the mid east region date back as some of the earliest Bronze Age tools.

 

Next topic: the Appalachian Trail (currently reading "A Walk in the Woods "by Bill Bryson....good read thus far)

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the newest target group of marketers is the "Nesties", young women between 24 and 32 who are preparing for or planning on families. This group spends more money on overall general consumer products than any other group. Thier income range is $34,000 to $65,000 yearly and most are in professional service industries such as nursing, or education.

 

Next topic: death by crucification

 

 

"Crucification"??? Anyway, all the representations of Jesus on the cross are wrong. Virtually every anatomist who has opined on this feels that the nails have to go through the wrists, not the hands. The bone of the hands have "open spaces" between them that would allow them to slip through the nails. The wrist bones would stop a "proper" job. Macabre, but true.

 

Next: "Bees".

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