A genomic analysis of ancient human remains from Morocco in northwest Africa revealed that food production was introduced by Neolithic European and Levantine migrants and then adopted by local groups. A research team from Sweden, Spain and Morocco present their results in Nature on June 7th.
Using serial femtosecond crystallography performed with the XFEL technique, scientists have been able to see the crucial final step in the reaction cycle of Photosystem II, and managed to obtain more information on the interaction between Photosystem II and the Mn/Ca cluster. "Such a development is important for scaling up hydrogen production from water by sunlight or renewable electricity."
When the human remains found on board the warship Vasa were investigated, it was determined that the skeleton designated G was a man. New research now shows that the skeleton is actually from a woman. "It is very difficult to extract DNA from bone which has been on the bottom of the sea for 333 years, but not impossible”, says Marie Allen, Professor at Uppsala University.
Scientists from Uppsala University have used cryo-electron microscopy to reveal details of the protein synthesis mechanism in the parasite Giardia intestinalis, which causes diarrhoeal disease. The new insights could be valuable for screening specific drugs against Giardia and other protozoan parasites.
For nearly 190 years, scientists have searched for the origins of ancient sea-going reptiles from the Age of Dinosaurs. Now a team of Swedish and Norwegian palaeontologists has discovered remains of the earliest known ichthyosaur or ‘fish-lizard’ on the remote Arctic island of Spitsbergen.
Researchers at Uppsala University have shown that Scandinavian wolves carry around 100,000 harmful mutations in their genome. As long as the harmful mutations can be compensated by a healthy genetic variant, this does not need to pose a problem. However, as there has been a high level of inbreeding in the wolf population, the occurrence of double harmful variants has increased with each generation
Researchers from Uppsala University and elsewhere have been studying the effect of rising temperatures on the lifespan of pollinating fig wasps. The findings show that the wasps lived much shorter lives at high temperatures, which would make it difficult for them to travel the long distances between the trees they pollinate.
Researchers from several universities have, by studying helical molecules in the body such as DNA, received clues as to how energy production in fuel cells can be made more efficient without admixture of carbon dioxide and heavy metals. The new research shows how the helical molecules, found naturally in all oxygen-dependent life, catalyses energy production in the cells.
In a study an international team of researchers have identified 28 gene regions that have been particularly important in the evolution of Darwin’s finches. These genetic variants do not represent recent mutations but constitute ancestral genetic variation that has accumulated over time as different species of Darwin’s finches have evolved with striking differences in beak morphology.
Coral species exhibit different temperature tolerances. This is in part due to the composition of their microalgae symbionts. With a new method, researchers from Uppsala University were able to predict how individual microalgae might behave under future temperature stress and identify more tolerant coral symbionts. In combination with forthcoming single cell selection and growth experiments, the
Mummification of the dead probably was more common in prehistory than previously known. This discovery was made at the hunter-gatherer burial sites in the Sado Valley in Portugal, dating to 8 000 years ago. A new study, headed by archaeologists at Uppsala University and Linnaeus University in Sweden and University of Lisbon in Portugal, presents new evidence for pre-burial treatments such as desi
Lava domes form at the top of many volcanoes when viscous lava erupts. When they become unstable, they can collapse and cause a hazard. An international team of researchers has analysed summit dome instabilities at Merapi Volcano, Indonesia. The researchers hope that by understanding the inner processes, volcano collapses can be better forecasted.
The asteroid which killed nearly all of the dinosaurs struck Earth during springtime. This conclusion was drawn by an international team of researchers after having examined thin sections, high-resolution synchrotron X-ray scans, and carbon isotope records of the bones of fishes that died less than 60 minutes after the asteroid impacted. The team presents its findings in the journal Nature.
An African man who lived just 350 years ago was buried in a prehistoric shell midden in Amoreira in Portugal, well known by archaeologists for the cemeteries of the last hunter-gatherers living in the area, 8 000 years-ago. To investigate this burial researchers from Uppsala University and Universidade de Lisboa combined biomolecular archaeology, ancient DNA, and historical records.
By linking human population studies with experiments in cell and animal models, researchers have provided evidence that complex mixtures of endocrine disrupting chemicals impact children’s brain development and language acquisition. With their novel approach, the scientists show that up to 54 per cent of pregnant women were exposed to experimentally defined levels of concern.
For many years, researchers at Uppsala University have been exploring the genetic origins of the Scandinavian grey wolf population, which was founded by only three immigrating wolves. In their new study the scientists show that, after five generations of inbreeding, between 10 and 25 per cent of the original genetic variation has been eliminated.
By drilling deep down into sediments on the ocean floor researchers can travel back in time. A research team led from Uppsala University now presents new clues as to when and why a period often referred to as the ‘biogenic bloom’ came to an abrupt end. Changes in the shape of the Earth's orbit around the Sun may have played a part in the dramatic change.
Carotenoids are the underlying pigment for much of the enormous variety in color found across birds and form the basis for the colors red, yellow, and orange. In a study published in Current Biology, researchers from Uppsala University and Princeton University have uncovered the genetic basis for the yellow beak of some Darwin’s finch nestlings.
The availability of prey and the ability to adapt to changing environments played key roles in the evolution of sharks. A new study, in which over 3,000 shark teeth were analysed, provides new insight into how modern shark communities were established. The results are published in the journal Current Biology.
An international team of researchers used historical museum collections to study the effects of human-made antibiotics over the entire history of their application. They found that the increased use of antibiotics in medicine and agriculture in the 1950-1990s led to increases in antibiotic resistance in wild Swedish brown bears. However, the latest 20 years show a downward trend in resistance.
