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Thanks to Ben Franklin, for his flying kite on June 10 1752, for his 1st setting up library, fire dept, hospital..
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It is in 1752, Benjamin Franklin conducted an experiment in connection with electricity charged clouds. He flew a homemade kite during a thunderstorm. The kite was made of a silk cloth mounted on a wooden cross, with about one foot of iron wire protruding above the kite. A key was tied to the end of metal string connected with the kite and the other end of the key was tied to a silken ribbon which Benjamin held while flying the kite. A bolt of lightning struck the kite wire and traveled down to the key causing a spark. This proved that lightning is electricity from charged clouds that can be brought to earth. There was a time when high-rise buildings were destroyed quite frequently by lightning. Benjamin Franklin invented lightning rod for the safety of buildings.
Photo: Ring of Water - F/A-18F Super Hornet hits speed of sound, water vapor in the air forms ring cloud around it
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An F/A-18F Super Hornet hits the speed of sound. As the plane pushes air away, the temperature drops and water vapor in the air forms a ring cloud around it.
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Photos courtesy of Christopher Pasatieri / Reuters
Original Source: Reuters, Time, and F-18 SUPER HORNET BREAKING THE SOUND BARRIER
72 years ago today, iconic Golden Gate Bridge finished construction ahead of schedule & $1.3 million under budget
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*update* 2019
Street cleaning cost doubled in 5 years from $33.4 million (2012-2013), to $65.4 million in the current 2017-2018 budget.
4,200 foot long main suspension span
clearance above high water averages 220 feet (67 m)
2 towers rise 746 feet (191 feet taller than the Washington Monument)
length: 8,980ft (2,737m), or 1.7mi (2.7 km)
Width: 90ft (27.4m), 6 lanes, pedestrians and bicycles
opening in 1937, then both the longest and the tallest suspension bridge in the world
The iconic Golden Gate Bridge in San Francisco, California, turned 72 years old on Wednesday. The Golden Gate Bridge is one of the most beautiful, and most photographed, bridges in the world. Its 4,200 foot long main suspension span was a world record that stood for 27 years. It is still the second longest in the United States after the Verrazano-Narrows Bridge which links Staten Island to Brooklyn in New York. The bridge's two towers rise 746 feet making them 191 feet taller than the Washington Monument. read more »
Vauban's streets are nearly "car-free": on outskirts of Freiburg, Germany - suburban pioneers give up their cars
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VAUBAN, Germany - Residents of this upscale community are suburban pioneers, going where few soccer moms or commuting executives have ever gone before: they have given up their cars.
Street parking, driveways and home garages are generally forbidden in this experimental new district on the outskirts of Freiburg, near the French and Swiss borders. Vauban’s streets are completely “car-free” - except the main thoroughfare, where the tram to downtown Freiburg runs, and a few streets on one edge of the community. Car ownership is allowed, but there are only two places to park — large garages at the edge of the development, where a car-owner buys a space, for $40,000, along with a home. As a result, 70 percent of Vauban’s families do not own cars, and 57 percent sold a car to move here. Vauban, completed in 2006, is an example of a growing trend in Europe, the United States and elsewhere to separate suburban life from auto use, as a component of a movement called “smart planning.”
Brief History of Hubble Space Telescope - undergoing final maintenance-and-repair mission before retiring in 2014
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The $1.5 billion Hubble rocketed to space aboard the space shuttle Discovery on April 24, 1990. It's named after Edwin Hubble, a pioneering American astronomer who furthered our understanding of other galaxies and demonstrated that the universe is continually expanding.
The Hubble's primary mirror, nearly eight feet across. A flaw in the mirror was discovered after the Hubble was in space; thanks to miscalibrated equipment, its glass had been ground slightly too finely at the edges. Though the imperfection measured just one-fiftieth of the thickness of a piece of paper, it distorted the Hubble's images. Astronauts fixed the problem in 1993.
About the size of a large school bus, the Hubble orbits at a speed of five miles per second, 353 miles above Earth. At that velocity it can cross the United States in about 10 minutes and circle the globe in an hour and a half. read more »
19-year-old MIT freshman invents one-wheeled zero-emissions electric motorcycle
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Ben Gulak invented an electric motorcycle that landed the 19-year-old freshman on the cover of Popular Science magazine for developing number one of their top 10 inventions of the year.
Dedication & devotion - Italy's brain scientist & Nobel laureate Rita Levi-Montalcini wants to forget turning 100
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This astonishing woman - who studied medicine, survived Fascism and prejudice, and went on to win the Nobel Prize in 1986, who still takes an active part in politics in the Senate, is planning another book and campaigning for the rights of women in Africa.
In her autobiography she writes that she and her twin sister Paola (an artist who died in 2000 and whose artworks decorate her office walls) were born to Adamo Levi, “an electrical engineer and gifted mathematician”, and Adele Montalcini, “a talented painter and an exquisite human being”. There were two older siblings, Gino and Anna, also both now dead. “The four of us enjoyed a most wonderful family atmosphere,” she writes, “filled with love and reciprocal devotion. Both parents were highly cultured and instilled in us their high appreciation of intellectual pursuit. Her father “was a person of great intellectual and moral value, but he was a Victorian. As a child, I saw him as a person who dominated everything I did.” read more »
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