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Why, since around 1960, have winters in northern Europe tended to become milder and wetter? The meteorological conditions responsible came under discussion at a meeting last month.
Materials that conduct ions are useful in devices involving electrochemical reactions, such as fuel cells and batteries. Low ionic conductivity was a problem for these materials until researchers built nanoscale versions.
The president-elect seems to have failed to inspire scientists during his campaign. Although support for research will probably grow, some policies and appointments are likely to signal trouble ahead.
Trials in mice of a possible vaccine for Alzheimer's disease show that it reduces the behavioural defects and the brain damage seen in the disease. As promising as these results are, a human vaccine remains a long way off.