Scientists hid speakers along a third of a mile of hiking trail in Boulder, Colorado, to fake a richer birdsong chorus, and hikers who never spotted them still walked away calmer - ScienceBlog.com
Boulder
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July 17, 2026
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Scientists hid speakers along a third of a mile of hiking trail in Boulder, Colorado, to fake a richer birdsong chorus, and hikers who never spotted them still walked away calmer ScienceBlog.com
Source: https://news.google.com/rss/search?q=Boulder%20Colorado&hl=en-US&gl=US&ceid=US:en - Read Original
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