Like humans, crows are more optimistic after making tools to solve a problem
A new paper, co-authored by Dakota McCoy, a graduate student working in the lab of George Putnam Professor of Biology David Haig, suggests that, after using tools, crows were more optimistic.
Peter Reuell
• harvard
Aug. 22, 2019 • ~7 min
Aug. 22, 2019 • ~7 min
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