Author archives: César Tomé

Competing gravity of galactic clouds probably caused band of gas A gravitational tug-of-war between the Large Magellanic Cloud and the Small Magellanic Cloud may be responsible for the huge ribbon of gas at the halo of the Milky Way. Astronomers in the U.S. and Germany measured how much oxygen and sulphur there is in the […]

“Junk” DNA in plants not needed to remain healthy So-called junk DNA is just that — junk, according to a study by researchers at the University of Buffalo in New York. In a study of the carnivorous bladderwort plant, they found that the part of the genome not responsible for coding proteins in plants is […]

Pear-shaped nuclei in some atoms may help explain antimatter Researchers have used a particle accelerator called REX-ISOLDE at CERN in Switzerland to discover an atom with pear-shaped nuclei. The discovery could lead scientists to extend the Standard Model in physics and help to explain why there is more matter than antimatter in the universe. LiveScience […]

There are few cases in the history of physics in which a particle, theoretically predicted, has been detected repeatedly and not identified as such. This is what happened to the positron. Paul Dirac showed in 1928 that it could be the case that a particle could have negative energy but a positive charge. It was […]

Jamestown settlers turned to cannibalism to survive, bones show The scarred skull of a 14-year-old girl reveals that English settlers in Jamestown, Va., may have engaged in cannibalism to survive. A brutal winter in 1609 brought a food shortage, killing off 80% of the population. Marks on the girl’s skull and tibia are the first […]

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 […]

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 […]

An abrupt and widespread climate shift in the Sahara 5,000 years ago The Sahara Desert’s shift from lush grasslands to barren sands happened quickly and simultaneously across the entire region. Scientists say the brief African Humid Period began and ended suddenly, about 5,000 years ago. MIT news D. McGee, P.B. deMenocal, G. Winckler, J.-B. Stuut […]

Scientists use 3D printer to create networks of artificial cells Researchers have developed networks of water droplets that can act like biological tissue cells. The researchers created the networks using a three-dimensional printer. The networks can support up to 35,000 droplets and have the potential to be a scaffold for growing synthetic tissues or a […]

Our metastable universe Under the simplest assumptions, the measured mass of the Higgs could mean the universe is eventually unstable and destined to fall apart. Scientific American Could flow batteries back up electric grids? To power flow batteries, two aqueous electrolytes held in different tanks are pumped through a membrane into a separate chamber, causing […]