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<p>Structural changes of Photosystem II and its catalytic center (Mn4Ca cluster) during the water oxidation reaction.  The movie shows the S2 to S3 transition step, where the first water (as shown in Ox) comes into the catalytic center after the photochemical reaction at the reaction center.(Credit: Yano and Yachandra et al./Berkeley Lab)</p>

Showtime for Photosynthesis

Using a unique combination of nanoscale imaging and chemical analysis, an international team of researchers has revealed a key step in the molecular mechanism behind the water splitting reaction of photosynthesis, a finding that could help inform the design of renewable energy technology.

<p>The worldwide incidence rate of COVID-19. (Credit: Center for Systems Science and Engineering at Johns Hopkins University)</p>

Using Machine Learning to Estimate COVID-19’s Seasonal Cycle

One of the many unanswered scientific questions about COVID-19 is whether it is seasonal like the flu – waning in warm summer months then resurging in the fall and winter. Now scientists at Lawrence Berkeley National Laboratory are launching a project to apply machine-learning methods to a plethora of health and environmental datasets, combined with high-resolution climate models and seasonal forecasts, to tease out the answer.