High-speed footage reveals shoe squeaks can start with a tiny bolt of lightning — plus, evidence that a debated brain phenomenon exists in humans.

00:44 The science of squeaky shoes

Research Article : Djellouli et al.

Basketball sound effects via Bradley Kanaris/Getty.

09:05 Research Highlights

Nature: Runaway black hole leaves a trail of stars

Nature: Super-sticky feet help a robot to climb the walls

11:31 Evidence of hippocampal neurogenesis

Research Article: Disouky et al.

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How earthquakes and lightning help explain squeaky sneakers

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How earthquakes and lightning help explain squeaky sneakers