Hair is composed mainly of the protein keratin, with an inner layer containing melanin that gives our hair its natural colour. An outer layer, called the cuticle, protects the hair. Average rate of hair growth is 1cm a month. Speed of hair growth depends on genetics, age and hormone levels.
Ctrl+Alt+Down Arrow = Turns screen upside-down. Ctrl+Alt+Up Arrow = Turns screen rightside-up. Ctrl+Alt+Right Arrow = Turn screen once, clockwise. Ctrl+Alt+Left Arrow = Turns screen once, counter-clockwise.
Pressing CTRL+ALT+UP ARROW restores your screen to its upright position, and CTRL+ALT+RIGHT ARROW or CTRL+ALT+LEFT ARROW pivots your computer screen. That's why sometimes people accidently rotate their screen sideways without actually knowing what happened.