Resilience of Yellowstone’s forests tested by unprecedented fire

Researchers describe what happens when Yellowstone -- adapted to recurring fires every 100 to 300 years -- instead burns twice in fewer than 30 years. Yellowstone as we know it faces an uncertain future, the researchers say, and one of the big questions they hope to answer is whether the forests can recover.

Researchers document impact of coffee on bowels

Coffee drinkers know that coffee helps keep the bowels moving, but researchers in Texas are trying to find out exactly why this is true, and it doesn't seem to be about the caffeine, according to a new study. Researchers, feeding rats coffee and also mixing it with gut bacteria in petri dishes, found that coffee suppressed bacteria and increased muscle motility, regardless of caffeine content.

Electric field-based dressing helps heal wound infections

Researchers have found a way to charge up the fight against bacterial infections using electricity. Scientists have developed a dressing that uses an electric field to disrupt biofilm infection in wounds.

Dangerous pathogens use this sophisticated machinery to infect hosts

A detailed new model of a bacterial secretion system provides directions for developing precisely targeted antibiotics.

Cell polarity: An aurora over the pole

Recent research has identified the master switch that triggers the symmetry breaking process in the zygotes of the nematode worm, Caenorhabditis elegans.

Researchers unravel mechanisms that control cell size

A multidisciplinary team has provided new insight into underlying mechanisms controlling the precise size of cells. The researchers found that 'the adder,' a function that guides cells to grow by a fixed size from birth to division, is controlled by specific proteins that accumulate to a threshold.

Earliest evidence of the cooking and eating of starch

New discoveries made at the Klasies River Cave in South Africa's southern Cape, where charred food remains from hearths were found, provide the first archaeological evidence that anatomically modern humans were roasting and eating plant starches, such as those from tubers and rhizomes, as early as 120,000 years ago.

Early dengue virus infection could ‘defuse’ zika virus

The Zika virus outbreak in Latin America has affected over 60 million people up to now. The infection can have potentially fatal consequences for pregnant women and their unborn children: many children have subsequently been born with malformations of the head (microcephaly). A particularly high incidence of these Zika-associated malformations exists in northeastern Brazil. Scientists tried to find out the reasons for this regional cluster and discovered a surprising protective factor.

Changes in subsistence hunting threaten local food security

Scientists say that subsistence hunting in Neotropical rain forests -- the mainstay of local people as a source of protein and a direct connection to these ecosystems -- is in jeopardy from a variety of factors.

Sedimentary, my dear Johnson: Is NASA looking at the wrong rocks for clues to...

While volcanic, igneous rock predominates on Mars, virtually the entire Earth fossil record comes from sedimentary rocks. Addressing the problem, Swedish scientists have begun compiling evidence of fossilized microbes in underexplored igneous rock environments on Earth, to help guide where to search for a Martian fossil record -- and what to look for.

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Crisis en Venezuela: ¿qué ha pasado con la clase media en Caracas?

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