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  • X 63 months ago
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X is for X Chromosome 

X is for X Chromosome The X chromosome of the two chromosomes that determine sex in many species (the other is "Y") The X chromosome is found in both males and females (In case you were wondering if the sexes had anything in common) The X chromosome represents about 2,000 out of 25,000 genes (sounds …

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Z is for Zippers 

The concept of the zipper was introduced by Whitcomb L. Judson, and debuted in 1893 at Chicago’s World Fair. The first working zipper was designed by Gideon Sundback; Sundback married the company manager’s daughter and then later, after her death, was inspired to actively work on the original design for the zipper. (If no one …

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