The Mona Lisa effect is the illusion that the subject of a painting follows you with her gaze, despite where you stand. But da Vinci's famous painting doesn't have that quality. Christopher Intagliata reports.

"<i>Mona Lisa</i> Effect" Not True for <i>Mona Lisa</i>

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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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"<i>Mona Lisa</i> Effect" Not True for <i>Mona Lisa</i>

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