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 New York fashion icon who is famous for her thick-framed oversized glasses has served as a muse to Eyebobs, a U.S. eye wear company. It has unveiled a set of three limited-edition frames which has been dubbed the 'Iris'. Influential: Iris Apfel (pictured), who is 90, has inspired a range of lookalike glasses. Created by Eyebobs, a U.S. eye wear brand, the oversized frames are similar to her own. The set of three colours come in a polarised variety, which is priced at $99 as well as a 'sunreader' design which is priced at $75.