Stem Cell. By definition, all stem cells: have the ability to divide and create an identical copy of themselves, a process called self-renewal; and. can also divide to form cells that mature into cells that make up every type of tissue and organ in the body.
Spandex is a synthetic fiber invented in 1959 at DuPont's Benger Laboratory in Waynesboro, Virginia. The word âspandexâ is an anagram of the word âexpandsâ. Spandex has become quite well known as a wonder fibre that has literally transformed the textile industry, for one.
Bernard Gotfryd/ Getty Images. In 1943, naval engineer Richard James was trying to develop a spring that would support and stabilize sensitive equipment on ships. When one of the springs accidentally fell off a shelf, it continued moving, and James got the idea for a toy. His wife Betty came up with the name, and when the Slinky made its debut in late 1945, James sold 400 of the bouncy toys in 90 minutes. Today, more than 250 million Slinkys have been sold worldwide.