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Insights into just how viruses alter over time often helps us deal with this pandemic and get away from future ones, says Jonathan R. Goodman.Watching birds is excellent enjoyment, and there's interesting physics behind how some obtain colours, claims Chanda Prescod-Weinstein.Good ventilation is essential in interior spaces including planes.Contact tracing and a reduced number of new cases are very important before lifting coronavirus restrictions, reports Jessica Hamzelou.The covid-19 pandemic could trigger severe pov
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