Global analysis identifies at-risk forests

Forests are engaged in a delicate, deadly dance with climate change, sucking carbon dioxide out of the air with billions of leafy straws and hosting abundant biodiversity, as long as climate change, with its droughts, wildfires ...

Western wildfire smoke plumes are getting taller

In recent years the plumes of smoke crawling upward from Western wildfires have trended taller, with more smoke and aerosols lofted up where they can spread farther and impact air quality over a wider area. The likely cause ...

Robotic ammonites recreate ancient animals' movements

In a university swimming pool, scientists and their underwater cameras watch carefully as a coiled shell is released from a pair of metal tongs. The shell begins to move under its own power, giving the researchers a glimpse ...

New, highly tunable composite materials—with a twist

Watch for the patterns created as the circles move across each other. Those patterns, created by two sets of lines offset from each other, are called moiré (pronounced mwar-AY) effects. As optical illusions, moiré patterns ...

Chemists' HAT trick for greener chemical synthesis

Creating new chemical compounds, such as new drugs, is not as simple as assembling one of those models with colored balls and sticks you might have seen in a beginning chemistry class. No, it's often a complex process with ...

Spatial distribution of anti-Asian hate tweets during COVID-19

In January of 2020, SARS-CoV-2 reached the United States. With it came an even faster-spreading virus—xenophobic rhetoric referring to the pandemic's epicenter in Wuhan, China. Politicians flooded news outlets and social ...

What we're still learning about how trees grow

What will happen to the world's forests in a warming world? Will increased atmospheric carbon dioxide help trees grow? Or will extremes in temperature and precipitation hold growth back? That all depends on whether tree growth ...

Climate change increases risks of tree death

Planting a tree seems like a generally good thing to do for the environment. Trees, after all, take in carbon dioxide, offsetting some of the emissions that contribute to climate change.

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