Researchers from Ruhr-Universität Bochum and the University of Bonn have investigated which activity patterns occur in the brain when people remember or forget things. They were interested in how the brain replays and stores during sleep what it had learned before. The team recorded the brain activity of epilepsy patients who had electrodes implanted into their brain for the purpose of surgical planning. One result: During sleep, the brain even reactivates memory traces that it can no longer remember later on.

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Species-rich subtropical forests can take up, on average, twice as much carbon as monocultures. This has been reported by an international research team in the professional journal SCIENCE. The study was carried out as part of a unique field experiment conducted under the direction of Martin Luther University Halle-Wittenberg (MLU), the German Centre for Integrative Biodiversity Research (iDiv) and the Chinese Academy of Sciences. The experiment comprises forests grown specifically for this purpose in China; for the study, data from experimental plots with a total of over 150,000 trees were analysed. The researchers believe that the results speak in favour of using many different tree species during reforestation. Thus, both species conservation and climate protection can be promoted.

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Alaska’s land mass is equal to the size of one-fifth of the continental United States, yet stores about half of the country’s terrestrial – both upland and wetland –  carbon stores and fluxes. The carbon is not only stored in vegetation and soil, but also in vital freshwater ecosystems even though lakes and ponds, rivers, streams, and springs only cover a small amount of landmass in Alaska.

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