05 dezembro 2016

Lightning over Colorado


Have you ever watched a lightning storm in awe? Join the crowd. Oddly, nobody knows exactly how lightning is produced. What is known is that charges slowly separate in some clouds causing rapid electrical discharges (lightning), but how electrical charges get separated in clouds remains a topic of much research. Lightning usually takes a jagged course, rapidly heating a thin column of air to about three times the surface temperature of the Sun. The resulting shock wave starts supersonically and decays into the loud sound known as thunder. Lightning bolts are common in clouds during rainstorms, and on average 44 lightning bolts occur on the Earth every second. Pictured, over 60 images were stacked to capture the flow of lightning-producing storm clouds in July over Colorado Springs, Colorado, USA.

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Samurai considered skill with a bow to be far more important...



Samurai considered skill with a bow to be far more important than skill with a sword. Not what you thought, right? It makes sense considering Japanese battle tactics. Samurai would rain arrows down on the other side’s fighters from a nice, safe distance, shooting the arrows upwards at an angle to get the right range and damage. Close combat was much more dangerous, so it was considered the last resort if ranged battle had already failed.

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This is the Antonov A-40 Krylya Tanka. It was an experimental...



This is the Antonov A-40 Krylya Tanka. It was an experimental Soviet project that involved strapping biplane wings and a tail to a small tank. The contraption would be towed into the air by airplane, then dropped to glide onto a battlefield. The idea was the tanks could re-supply Soviet ground troops who had lost their tanks or who needed additional support. The Antonov A-40 Krylya Tanka was tested in 1942 but (unsurprisingly) found to be unworkable.

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Chaos at Hyperion


The moon Hyperion tumbles as it orbits Saturn.

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Lollapa-LOO-za: A Toilet Day Festival And Its Host City's Toilet Options

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December 5th 1952: Great Smog of London begins On this day in...


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December 5th 1952: Great Smog of London begins

On this day in 1952, the Great Smog descended on London, beginning a national crisis which lasted for four days. Following the Industrial Revolution, which began in the late eighteenth century, London saw a sharp rise in polluted, smoky fog (known as smog) due to toxic coal fumes emitted by factories. Smog, unlike fog, is often thick, discoloured, and foul-smelling, and several smogs affected London throughout the nineteenth century. December 1952 was bitterly cold, and as Londoners burned large amounts of coal to keep warm, the smoke joined with toxic fumes from factories. The smoke was trapped by an anticyclone in the region, and, unable to disperse, combined with fog to create a smog. The thick smog caused chaos in London, with traffic halted by poor visibility of a few metres, opportunists committing crime, and the poisonous air filling hospitals with people suffering from breathing problems. Around 4,000 people, plus numerous animals and livestock, are known to have died as a result of the fog, though recent estimates taking into account long-term damage are much higher at 12,000. The smog was London’s worst civilian disaster, producing more casualties than any single incident during the Second World War and the Blitz. To prevent future disasters, Parliament passed the Clean Air Act of 1956 which tried to limit smoke emissions. Innovations in technology and environmental legislation ensured that no such smog has ever occurred again, but invisible pollution remains a grave concern for modern cities.

(see: metoffice.gov.uk, historytoday.com)

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And we're back!

Thanks so much for sticking around everyone, I’m very pleased to say that regular posting will now be resuming.

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TODAY IN THE HISTORY OF PSYCHOLOGYVisit –>...



TODAY IN THE HISTORY OF PSYCHOLOGY

Visit –> all-about-psychology.com for free psychology information and resources.

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