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Ottobre 2013 archivio

Streghe e manici di scope

Res publica   31.10.13  

The Atlantic racconta da cosa è nata la leggenda delle streghe volanti su manici di scopa. Ha a che fare con i poteri lisergici della segale cornuta e di altri estratti e il metodo usato per assumere tali derivati allucinogeni.

It started with bread.

In the Europe of the Middle Ages and into the Renaissance, bread was made, in large part, with rye. And rye and rye-like plants can host fungus--ergot--that can, when consumed in high doses, be lethal. In smaller doses, however, ergot can be a powerful hallucinogen. Records from the 14th to the 17th century mention Europeans' affliction with "dancing mania," which found groups of people dancing through streets--often speaking nonsense and foaming at the mouth as they did so--until they collapsed from exhaustion. Those who experienced the "mania" would later describe the wild visions that accompanied it. (In the 20th century, Albert Hofmann would realize the psychedelic effects of LSD while studying ergot.)

So people, as people are wont to do, adapted this knowledge, figuring out ways to tame ergot, essentially, for hallucinatory purposes. And they experimented with other plants, as well. Forbes's David Kroll notes that there are also hallucinogenic chemicals in Atropa belladonna (deadly nightshade), Hyoscyamus niger (henbane), Mandragora officinarum (mandrake), and Datura stramonium (jimsonweed). Writing in the 16th century, the Spanish court physician Andrés de Laguna claimed to have taken "a pot full of a certain green ointment… composed of herbs such as hemlock, nightshade, henbane, and mandrake" from the home of a couple accused of witchcraft.

So why do the brooms fit into this? Because to achieve their hallucinations, these early drug users needed a distribution method that was a little more complicated than simple ingestion. When consumed, those old-school hallucinogens could cause assorted unpleasantnesses--including nausea, vomiting, and skin irritation. What people realized, though, was that absorbing them through the skin could lead to hallucinations that arrived without the unsavory side effects. And the most receptive areas of the body for that absorption were the sweat glands of the armpits... and the mucus membranes of the genitals.

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Un'immagine vale più di 140 caratteri

Geek   29.10.13  

Twitter ha introdotto la possibilità - attiva di default, ma si può disabilitare dal menu impostazioni - di visualizzare l'anteprima di immagini e video direttamente nel feed principale.
Da oggi cambia il modo di usare Twitter.

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Un astronauta sulla Terra

Multimedia   29.10.13  

An Astronaut's Guide to Life on Earth è il nuovo libro dell'astronauta canadese Chris Hadfield sui suoi anni di formazione e di esplorazione dello spazio, accompagnato da una serie di spiritosi video promo sui problemi psicologici dovuti al ritorno alla vita di tutti i giorni sulla Terra.

Through eye-opening, entertaining stories filled with the adrenaline of launch, the mesmerizing wonder of spacewalks, and the measured, calm responses mandated by crises, he explains how conventional wisdom can get in the way of achievement-and happiness. His own extraordinary education in space has taught him some counterintuitive lessons: don't visualize success, do care what others think, and always sweat the small stuff.

You might never be able to build a robot, pilot a spacecraft, make a music video or perform basic surgery in zero gravity like Col. Hadfield. But his vivid and refreshing insights will teach you how to think like an astronaut, and will change, completely, the way you view life on Earth-especially your own.

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50 invenzioni che hanno fatto la storia

Geek   29.10.13  

L'Atlantic ha chiesto a un gruppo composto da storici, scienziati e ingegneri di classificare le 50 più grandi innovazioni della storia dopo l'invenzione della ruota. Eccole.

18. The automobile, late 19th century
Transformed daily life, our culture, and our landscape.

19. Industrial steelmaking, 1850s
Mass-produced steel, made possible by a method known as the Bessemer process, became the basis of modern industry.

20. The pill, 1960
Launched a social revolution.

21. Nuclear fission, 1939
Gave humans new power for destruction, and creation.

22. The green revolution, mid-20th century
Combining technologies like synthetic fertilizers and scientific plant breeding hugely increased the world’s food output. Norman Borlaug, the agricultural economist who devised this approach, has been credited with saving more than 1 billion people from starvation.

23. The sextant, 1757
It made maps out of stars.

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Viaggi temporali

Geek   28.10.13  

Tre semplici modi per viaggiare attraverso il tempo (li potete provare anche subito) e altri tre che potreste trovare non altrettanto semplici.

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