Science & Mathematics
Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe. Mathematics is the study of quantity, structure, space, and change. Mathematicians seek out patterns and formulate new conjectures. Mathematicians resolve the truth or falsity of conjectures by mathematical proof.
Who invented the zipper? Why do most Zippers have the letters YKK on them?
A more practical version came on the scene in 1913 when a Swedish-born engineer, Gideon Sundback revised Judson's idea and made his with metal teeth instead of a hook and eye design...
Science & Mathematics > Physics
Madrid > Sweden