To save giant sequoia trees, maybe it's time to plant backups

Last month, unusually high winds knocked down 15 giant sequoias in Yosemite. If you haven't had a chance to see them in person, giant sequoias are big—like, warp-your-sense-of-scale and melt-your-brain big. Then, once you've ...

Air pollution returning to pre-COVID levels

In early 2020, data from satellites were used to show a decline in air pollution coinciding with nationwide lockdowns put in place to stop the spread of COVID-19. One year later, as lockdown restrictions loosen in some countries ...

Three storms have dumped snow on Mauna Loa and Mauna Kea

The words "snow" and "Hawai'i" are not often mentioned in the same paragraph—or even on the same vacation. But snow does fall in Hawai'i almost every year, and 2021 has seen a deep cold front drop snow on the summits of ...

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