Zinc ‘fireworks’ pop when egg meets sperm

"On cue, at the time of fertilization, we see the egg release thousands of packages, each dumping a million zinc atoms, and then it's quiet," says Thomas V. O'Halloran. "Then there is another burst of zinc release. Each egg has four or five of these periodic sparks.

Cup of ISSpresso & other space novelties (+VIDEO)

The first female Italian astronaut has taken the first coffee machine to space, so now the ISS crew can start their morning with a cup of espresso. Take a look at other devices that make life in Earth's orbit more fun.

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