Chemistry • Condensed matter • Energy • Materials • Physics
The German mineralogist Gustav Rose (1798 – 1873) made important contributions in the fields of petrology and crystallography. He was the first to use a reflective goniometer in Germany and developed a particular interest in the relationship between the crystalline form and the physical properties of minerals. As a consequence, he contributed significantly to the […]
Descartes’ opening of the Pandora’s box of skepticism, and the liberation of the Evil Demon it triggered, started a terrible shock in the tectonic plates of Western thought, a shock whose waves still reach us with more or less strength, and that mainly contributed to configure our contemporary intellectual landscape. I shall devote the next […]
Ants communicate through different mechanisms in order to regulate their social organization. The best known is through scented chemicals known as pheromones. These chemical messengers are received at the tips of the antennae and differences in concentration between the left one and the right one are used as an orientation vector. Ants use about ten […]
Humanities & Social Sciences • Science • Technology • Weekly Selection
Volcanoes, asteroid may have killed dinosaurs Researchers studying ancient lava flows in India say volcanic eruptions, combined with an asteroid strike, caused the mass extinction of dinosaurs some 66 million years ago. Los Angeles Times New Zealand fish jumps out of water to hunt prey Researchers in New Zealand have discovered that the banded kokopu […]
It all began in 1891, when Dr. William B. Coley, a bone sarcoma surgeon at the Memorial Hospital in New York, injected streptococcal organisms into a patient with inoperable cancer. He thought that the infection he induced would have the side effect of shrinking the malignant tumor… and quite surprisingly he was right! The patient’s […]
Anyone who has studied, even superficially, some thermodynamics has encountered the word adiabatic very early. This is because adiabatic processes are extremely useful to understand the basics of the field. An adiabatic process is any process that occurs without heat (or matter) entering or leaving a system. In general, an adiabatic change involves a fall […]
Three main incorporations of physical robots are forecasted in our lives: transport, assistance and factory robots. Design and requisites of these different kinds are quite different, but one particularly is attracting researchers’ efforts: navigation. While transport robotics is located outdoors, the rest two are indoors. Outdoors machines can make use of a GPS (among other […]
Biology • Biotechnology • Ethics • Evolution • Genetics
Ever since the 1993 film based on Michael Crichton’s novel Jurassic Park was released, the thought of reviving extinct species using molecular biology techniques has been on the forefront of the collective imaginary. The idea seemed pretty simple: reading the genetic code of fossilized animals would provide the instruction manual to bring them back to […]
Humanities & Social Sciences • Science • Technology • Weekly Selection
Gravitational waves from binary black holes milder than thought Black holes rotating around each other on a collision course create milder gravitational waves than previously thought, a study published online in Science suggests. Scientists studying pulsars with super-sensitive equipment for 11 years looking for evidence of gravitational waves coming from binary black holes haven’t found […]
A lot has been said and written about what makes women physically attractive, from having full lips and/or breasts to being shorter than a man, to having a symmetrical face to having a low waist-hip ratio (WHR), all being indicators, at least in theory, of potential reproductive fitness . For instance, a low WHR has […]