Brown Eyes vs Other Colored Eyes

"The only difference between brown eyes and every other colored eye is that brown eyes have more pigment."

Animals Which sleep on their back.....

"The only animals that can naturally sleep on their backs are humans. No other animal actually does--apes usually sleep sitting up and leaning on something."

Origin of Salute....

"The military salute originated during the medieval times. Knights in armour used to raise their visors to reveal their identity, and the motion later evolved into the modern-day salute."

A salute (also called obeisance) is a gesture (often a finger gesture) or other action used to display respect. Salutes are primarily associated with armed forces, but other organizations and civil people also use salutes.

The exact origin of this salute has been lost to time. One theory is that it came from Roman soldiers' shading their eyes from the intense light that was pretended to shine from the eyes of their superiors. Another theory is that it came from when men-at-arms wore armour—a friendly approach would include holding the reins of the horse with the left hand while raising the visor of the helmet with the right, so that one would know they meant not to battle them. A third theory is that the salute, and the handshake, came from a way of showing that the right hand (the fighting hand) was not concealing a weapon. A combination of showing an empty right hand, palm outwards, which was then raised formally to a helmet to raise a visor would demonstrate non-aggressive intentions, and therefore respect. In Tudor times the helmet of a suit of armour was known as a 'sallet', a word very similar to the word 'salute'.

Shell Company - Origin

"The Shell Oil Company originally began as a novelty shop in London that sold seashells."

The name Shell is linked to the Shell Transport and Trading Company. In 1833, the founder's father, also Marcus Samuel, founded an import business to sell seashells to London collectors. When collecting seashell specimens in the Caspian Sea area in 1892, the younger Samuel realized there was potential in exporting lamp oil from the region and commissioned the world's first purpose-built oil tanker, the Murex (Latin for a type of snail shell), to enter this market; by 1907 the company had a fleet. Although for several decades the company had a refinery at Shell Haven on the Thames, there is no evidence of this having provided the name.

Human Nostrils....Smell

"Each nostril of a human being registers smells in a different way. Smells that are made from the right nostril are more pleasant than the left. However, smells can be detected more accurately when made by the left nostril."

A nostril (or naris, pl. nares) is one of the two channels of the nose, from the point where they bifurcate to the external opening. In birds and mammals, they contain branched bones or cartilages called turbinates, whose function is to warm air on inhalation and remove moisture on exhalation. Fish do not breathe through their noses, but they do have two small holes used for smelling which may be called nostrils.

The Procellariiformes are distinguished from other birds by having tubular extensions of their nostrils.

In humans, the nasal cycle is the normal ultradian cycle of each nostril's blood vessels becoming engorged in swelling, then shrinking. During the course of a day, they will switch over approximately every four hours or so, meaning that only one nostril is used at any one time. The nostrils are separated by the septum.