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.
The Cat in the Hat. The Cat in the Hat is a children's book written and illustrated by Theodor Geisel under the pen name Dr. Seuss and first published in 1957. The story centers on a tall anthropomorphic cat, who wears a red and white-striped hat and a red bow tie. The Cat shows up at the house of Sally and her unnamed brother one rainy day when their mother is away. Ignoring repeated objections from the children's fish, the Cat shows the children a few of his tricks in an attempt to entertain them. In the process