Embryo implantation in humans. After fertilization the human embryo begins a 4 day long journey down the fallopian tube and into the uterus. When the embryo reaches the blastocyst stage it develops two distinct populations of cells. The outer cell mass,called the trophectoderm, and the inner cell mass.
Cat eye glasses. Named after their resemblance to the shape of a cat's eye, cat eye glasses are probably the most popular style of vintage eyeglasses. Though cat eye glasses were around since the 1950's, they reached their peak popularity when Audrey Hepburn wore a pair in the 1961 film Breakfast at Tiffany's.
A popular good luck stone, Tigerâs Eye/Catâs Eye was used to ward off the evil eye, and to reflect back any malice or threats without absorbing any negative energy. It was used a great deal in voodoo rituals. Holding a Tigerâs Eye was also used to discern if someone else was reliable or not.