"The main fuel to speed the world's progress," wrote Simon in the introduction to the 1995 collection The State of Humanity, "is our stock of knowledge; the brakes are our lack of imagination and unsound social regulations of these activities. The ultimate resource is people--especially skilled, spirited, and hopeful young people endowed with liberty--who will exert their wills and imaginations for their own benefit, and so inevitably they will benefit the rest of us as well."
Mujeres cubanas son pilares de la disidencia, por Juan Carlos Chávez.
El arresto de Sánchez, de 37 años, fue solo uno de miles que se multiplicaron en diferentes pueblos y ciudades de la isla. En el 2012 agentes cubanos realizaron 6,602 detenciones a corto plazo de disidentes pacíficos. La cifra supera ampliamente a las 4,123 en el 2011 y las 2,074 en el 2010, según las conclusiones de un informe de la Comisión Cubana de Derechos Humanos y Reconciliación Nacional, radicada en La Habana.
Julian Simon: Still more right than lucky in 2013, by Mark J. Perry.
The updated chart also shows that the world population in 1934 was about 2 billion people, and we now live in a world with almost 7 billion people. Therfore, over a period that includes several generations or more, we see an overall significant downward trend in real commodity prices, despite an increase of more than 5 billion people in the world. Overall, I still conclude that Julian Simon was more right than lucky.
150 Aniversario del Metro de Londres, por Ingeniería en la Red.
- 150 great things about the Underground, blog no oficial para conmemorar los 150 años y repleto de imágenes y curiosidades sobre el Metro de Londres.
- 150 years of the Underground, especial de The Guardian sobre los 150 años del Metro, con multitud de fotos, historia y planos.
- Borrador del primer plano para el Metro de Londres, que ideara Harry Beck y que se convertiría en un modelo a seguir.
- Aniversario del metro más antiguo del mundo: The Tube, post monográfico en Mos Ingenieros, que incluye un interesante documental con motivo de los 100 años, en 1963.
- 1913 London Underground Map, mapa desplegable del año 1913.
- Tunnelling into history: Amazing images show London houses being demolished to make way for the Tube in 1863, the world’s first underground railway, imágenes históricas de la construcción.
- The Tube 150 Anniversary: London Underground Map History In Pictures, recorrido por la historia del Metro en fotografías y planos, recogido por The Huffington Post.
- Historical Map: Railways of London, showing the Metropolitan and District Lines, 1889, el mapa más antiguo del Metro.
In fact, natural gas production in the United States is way up due to fracking. The process of fracking, which involves pumping water laced with sand and some small amounts of chemicals under high pressure into deep underground shale formations, has enabled drillers to release vast quantities of trapped natural gas. Thanks to fracking, shale gas productionhas grown from 1.3 trillion cubic feet (tcf) in 2007 to 7.8 tcf in 2011. According to the projections of the Energy Information Administration (EIA), U.S. natural gas production will rise from23 tcf in 2011 to 33 tcf in 2040 and almost all of that increase will be due to shale gas production. In his 2012 State of the Union speech, President Obama cited estimates that the U.S. has enough natural gas to last 100 years. That estimate has been questioned, but even if it’s off by a few decades, there’s still plenty of natural gas to burn.
