Charting the night sky with exascale computers

Creating multiple universes to see how they run might be tempting to scientists, but it's obviously not possible. That is, as long as you need physical universes. If you can make do with virtual ones, there are far more options.

Why is Ghana so hot this year? An expert explains

Ghana's meteorological agency and the state's health service have issued warnings about a period of very high temperatures expected in the first half of 2024 around the country. Ghana's experience is part of a global phenomenon: ...

How plants adjust their photosynthesis to changing light

Photosynthesis is the central process by which plants build up biomass using light, water, and carbon dioxide from the air. Gaining a detailed understanding of this process makes it possible to modify and thus optimize it—for ...

The universe's accelerated expansion might be slowing down

The universe is still expanding at an accelerating rate, but it may have slowed down recently compared to a few billion years ago, early results from the most precise measurement of its evolution yet suggested Thursday.

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