Sperm-egg sparks: Zinch reaction during fertilization (VIDEO).

Close-Up Video of the Incredible Chemical Reaction When Sperm Meets an Egg

Close-Up Video of the Incredible Chemical Reaction When Sperm Meets an Egg

Slate in motion.
Dec. 18 2014 9:20 AM

Sparks Fly

The amazing chemical reaction when sperm finally reaches an egg.

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Researchers at Northwestern knew fertilization triggered millions of zinc particles, but they'd never actually seen the process until now.

Update, Dec. 19, 2014: This post has been updated to specify that the researchers who captured the footage are from Northwestern University.

Update, Nov. 28, 2016: This video has been removed pending the resolution of a licensing claim.

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