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.
Cats Eye Trivia. 1  Cats cannot see directly beneath their noses. You can test this by offering your kitty a treat. 2  Rumors aside, cats are not colorblind. Their ability to see color is not as enhanced as ours, but they can see some colors. 3  If normal human vision is 20/20, then that of the cat is 20/100.