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Scientists have long focused on quantifying fear and other negative emotions in animals. Now they’re trying to measure positive feelings — and it’s a challenge.

These are my greatest lessons that came from real-world reps, mistakes and pressure — not textbooks or grades.

The internet is buzzing with hyper-realistic AI-generated videos of bunnies, raccoons, deer, and other wildlife, and many viewers are being fooled. These videos, often styled like Ring-camera footage, ...