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For humans, some days go by quickly and some days go by slowly. Professional athletes like baseball players or tennis players report that incoming balls appear to slow down right before they hit them. Scientists have figured out a test to see the general speed at which we process the world, which in turn tells us how time passes for people and for animals. Basically you can show animals lights flickering at different speeds, and that reveals how quickly they process the world.

Full story at YouTube.

More great science.