8th millennium

The eighth millennium of the Gregorian calendar will begin on January 1, 7001, and end on December 31, 8000. It will be the eighth millennium in the Anno Domini or Common Era.

Astronomical events

All these dates are in a uniform time scale such as Terrestrial Time. When converted to our ordinary solar time or Universal Time, which is decidedly non-uniform, via ΔT, the dates would be about one day earlier.

Nikon D7200

The Nikon D7200 is a 24-megapixel APS-C digital single-lens reflex camera announced by Nikon on March 2, 2015. It started shipping on March 19. It is the successor of the Nikon D7100 and has (among other things) the following enhancements:

Hair clipper

Hair clippers are specialized implements used to cut human head hair. They work on the same principle as scissors, but are distinct from scissors themselves and razors. Similar but heavier-duty implements are used to shear sheep, but are called handpieces or machine shears.

Operating principle

Hair clippers comprise a pair of sharpened comb-like blades in close contact one above the other and the side which slide sideways relative to each other, a mechanism which may be manual or electrical to make the blades oscillate from side to side, and a handle. The clipper is moved so that hair is positioned between the teeth of the comb, and cut with a scissor action when one blade slides sideways relative to the other. Friction between the blades needs to be as low as possible, which is attained by choice of material and finish, and frequent lubrication.

Manual clippers

Hair clippers are operated by a pair of handles which are alternately squeezed together and released.

Barbers used them to cut hair close and fast. The hair was picked up in locks and the head was rapidly depilated. Such haircuts became popular among boys, mostly in schools, and young men in the military and in prisons.