Scientists Capture Flash of Light at Moment of Conception

At the exact moment a sperm penetrates an egg, the latter releases billions of zinc atoms from its surface which spark off.

Sparks really do fly when the magic happens. At the exact moment a sperm penetrates an egg, the latter releases billions of zinc atoms from its surface which spark off. Using fluorescent microscopy, these sparks emit a light, which can then be filmed. The discovery that human eggs cells undergo this process could lead to new ways for doctors to identify viable eggs for in vitro fertilization (IVF).

Source: Scientists Just Captured Something Extraordinary At The Moment Of Fertilization | IFLScience