During the last year, a longtime forgotten controversy was reactivated by a very interesting paper written by J. Polchinski and his collaborators, in which they questioned whether the so called black hole complementarity principle is a good solution to the apparent information paradox of quantum gravity. This is a question that attracted a lot of […]
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Malaria reduced by preserving biodiversity of forests Researchers at Brazil’s University of Sao Paulo found that malaria could be kept from spreading while still preserving the biodiversity of the Amazon rainforest. The traditional view is that clearing such forests curbed the spread of the disease. Using a mathematical model, researchers found that the parasite causing […]
That knowledge is valuable is just a truism within our ‘knowledge driven economies’, but it is not that (economic) kind of value what I will talk about in connection to knowledge. I want to introduce, instead, a current and vivid debate in an arcane corner of philosophy. It is a debate about the nature of […]
The organism that causes flu is the influenza virus. It belongs to the family Orthomyxoviridae and they are included in Group V of the Baltimore classification, consisting in negative sense, single-stranded RNA viruses. Within this family there are three genres that are responsible for the flu: Influenza A virus, Influenza B virus and Influenza C […]
Pele is the Hawaiian goddess of volcanoes. Pele’s hairs are thin strands of molten basaltic glass drawn out from lava, thrown into the air from lava fountains, lava cascades or vigorous lava flows, and spun out by the wind. Each hair-like strand has a diameter less than 0.5 millimeters and is as long as 2 […]
Unlike road vehicles, all rail vehicles run through exactly the same piece of track and they cannot drift away to avoid a bad quality rail. Moreover, the contact patch between wheel and rail is a steel-to-steel contact with a small area and huge loads, so the stress the material is subject to is extremely high […]
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Could cellulose feed the world? Researchers have discovered a way to turn cellulose into starch, a technique that could be used to create more food to feed the hungry. Science Now Chun You eta al (2013) Enzymatic transformation of nonfood biomass to starch PNAS DOI: 10.1073/pnas.1302420110 Fire ants prefer shortest route in terms of time […]
Can you guess the sequence of the DNA strand that is analyzed in this experiment? (Feel free to use the comments!). One does not need to be a biochemist to figure it out. Start from the bottom of the picture. Just jump from one step of the “ladder” to the next, even if it is […]
In areas with dense cover or little snow, the wolf is one of the most difficult animals to census. In the Iberian Peninsula and other southern regions of wolves’ global range, snow is rare in winter, so wolves must be surveyed without snow. Spanish researchers Blanco and Cortés described in a recent paper the diverse […]