Brain freeze (aka ice-cream headache) results from dilation of blood vessels in the head when a nerve center located above the roof of your mouth tries to rapidly heat your brain.

The first mascara product invented in the 19th century was the blend of coal dust with petroleum jelly.

Nails grow at an average rate of 3 millimeters a month.

People born and living at sea level have a smaller lung capacity comparing to people who spend their lives at a high altitudes.

The human eye can distinguish 2.7 million colors and has a 200 degree viewing angle.

Viagra (Sildenafil) was initially studied for use in treating angina. Later the scientists discovered that it had more effect on penile erections than angina.

Official distance of marathon is 42.195 kilometers (26 miles 385 yards). The word comes from the story of Greek hero Pheidippides who ran this distance to Athens from the Plains of Marathon to tell of the Greek victory over Persian army.