Scientists found an interstellar iron isotope in Antarctic snow samples—which hints that our region of the universe may be the remnant of an ancient exploding star. Christopher Intagliata reports. 

Secrets of the Universe Trapped in Antarctic Snow

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Science

Ahead of a project to spray carbon dioxide into jungle plots, researchers contemplate what its results might signal about the forest’s future.
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A Long-Awaited Climate Experiment Is Poised to Launch in the Amazon. What Will It Find?

After years of delay, researchers are ready to inject carbon dioxide into jungle plots.
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A Singular Climate Experiment Takes Shape in the Amazon

Years in the making, a project in the Amazon rain forest is finally set to determine whether a rise in carbon dioxide could save one of the world’s largest carbon sinks.
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Will the Amazon Help Save the Planet?

Cows and at least one person in the U.S. have been sickened by avian influenza. We asked experts about the risk to humans.
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How Big a Threat Is Bird Flu?

Volcano detectives use artificial intelligence to sleuth out ancient secrets in Alaska.
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Secrets of the Universe Trapped in Antarctic Snow

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