Astrónomos europeos hallaron un planeta rocoso, como el nuestro que podría contener agua y vida a 22 años luz de la Tierra, en la constelación de Escorpio.
Saturday, February 4, 2012
Friday, January 27, 2012
Aurora boreale
Vídeo: Impresionantes auroras boreales en el norte europeo
Video da Murmansk, Russia al link
http://www.youtube.com/watch?v=_qWKLobBmPA
Video da Murmansk, Russia al link
http://www.youtube.com/watch?v=_qWKLobBmPA
Wednesday, January 25, 2012
Joule Unlimited
Joule Unlimited will build a production plant for turning sunlight and CO2 into liquid fuels.
Photosynthesis Fuel Company Gets a Large Investment - Technology Review
Saturday, January 14, 2012
Get physical
Michael Quinion (World Wide Words) writes
"Have you noticed how physical has begun to be more popular as one element in retronyms relating to the online world? If you actually go into a store to buy something, instead of ordering online, that’s physical shopping. Similarly, a physical book is one made with ink on dead trees, in contrast to a digital e-book. Both terms have been around for more than a decade but my impression is that they’ve only recently gone mainstream."
http://www.worldwidewords.org/nl/yurg.htm
"Have you noticed how physical has begun to be more popular as one element in retronyms relating to the online world? If you actually go into a store to buy something, instead of ordering online, that’s physical shopping. Similarly, a physical book is one made with ink on dead trees, in contrast to a digital e-book. Both terms have been around for more than a decade but my impression is that they’ve only recently gone mainstream."
http://www.worldwidewords.org/nl/yurg.htm
Nano 'ears' for nano whispers
"MOVE over microphones, nanophones have arrived. A gold sphere just 60 nanometres in diameter is the most sensitive listening device ever created, paving the way for soundtracks to formerly silent movies of bacteria and other single-celled organisms.
Alexander Ohlinger at Ludwig Maximilian University in Munich (LMU), Germany, and colleagues suspended gold nanoparticles in a drop of water. They trapped one sphere in a laser beam and then fired rapid pulses of light from a second laser at others a few micrometres away. The pulses heated the nanoparticles, which disturbed the water around them, generating pressure, or sound, waves."
Gold nano 'ears' set to listen in on cells - health - 13 January 2012 - New Scientist
Alexander Ohlinger at Ludwig Maximilian University in Munich (LMU), Germany, and colleagues suspended gold nanoparticles in a drop of water. They trapped one sphere in a laser beam and then fired rapid pulses of light from a second laser at others a few micrometres away. The pulses heated the nanoparticles, which disturbed the water around them, generating pressure, or sound, waves."
Gold nano 'ears' set to listen in on cells - health - 13 January 2012 - New Scientist
Saturday, January 7, 2012
The Shelter of Candelo
Il ricetto è una struttura fortificata protetta, posta all'interno di un paese, dove si accumulavano i beni (foraggi, vini, etc) della popolazione e, occasionalmente, dove si ritirava la popolazione in caso di attacchi dall'esterno.
http://it.wikipedia.org/wiki/Ricetto_di_Candelo
The The name Ricetto comes form the latin word "Receptum" that, in the Middle ages, simply meant "Shelter".
http://www.unricettoinmusica.it/index.php?en/96/ricetto-of-candelo
http://it.wikipedia.org/wiki/Ricetto_di_Candelo
The The name Ricetto comes form the latin word "Receptum" that, in the Middle ages, simply meant "Shelter".
http://www.unricettoinmusica.it/index.php?en/96/ricetto-of-candelo
The Erbil Citadel
"Erbil Citadel Town, which is situated dramatically on top of an artificial, 32-meters high earthen mound, and visually dominating the expansive modern city of Erbil, is believed to have been in continuous existence for 7000 years or even more. Thus, it may be regarded as the oldest continuously inhabited settlement in the world. Because of its past fortifications and steeply inclined mound, which is at some locations nearly 45 degrees, it has managed to survive numerous sieges and fierce attacks. The existing fabric, however, goes back to several hundred years but is, nevertheless, of extreme vernacular architectural and urban interest, not only for Iraq but also for humanity at large."
http://whc.unesco.org/en/tentativelists/5479/
http://whc.unesco.org/en/tentativelists/5479/
Friday, January 6, 2012
Megalith Map
An important resource for finding megalithic and prehistoric sites in England, Ireland, Scotland and Wales
http://www.megalithic.co.uk/asb_mapsquare.php
http://www.megalithic.co.uk/asb_mapsquare.php
Louisiana's wetlands
Jim Allen is proposing some quite interesting images of the Louisiana's wetlands. Look them at
http://www.atlantisbolivia.org/canalslouisiana1.htm
http://www.atlantisbolivia.org/canalslouisiana1.htm
Ohm's law at atomic scale
"A new technique for embedding atomic-scale wires within crystals of silicon has revealed that Ohm's law can hold true for wires just four atoms thick and one atom tall. The result comes as a surprise because conventional wisdom suggests that quantum effects should cause large deviations from Ohm's law for such tiny wires. Paradoxically, the researchers hope the finding will aid the development of quantum computers."