These optical illusions are why butterflies are so hard to catch

High-speed footage of takeoffs reveal that the butterfly markings mislead the eye, making them harder to catch.

00:45 Butterflies in flight create confusing motion cues that baffle birds

Research Article: Hancock et al.

14:09 Research Highlights

Research Article: Menezes and Podos

Research Highlight: Huge hoard of metal bars hints at vast Iron Age trade

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