Color Vision Test

The word ‘hologram’ comes from two Greek words. ‘Holo’ which means whole and ‘gamma’ which means message. Hungarian engineer and physicist, Dennis Gabor, came up with the idea of holograms in 1947 and was later awarded the Nobel Prize in 1971 for the invention.

Medieval farm animals were much smaller than farm animals today. A full-grown bull was around the size of a modern calf, and sheep were only a third of the size they are today! Sheep nowadays yield an average of 3.32 kg (7.3 pounds) of wool, while it was not uncommon for medieval sheep to yield less than 0.05 kg (less than 1 pound)!

The sun isn’t merely that far-away ball of gas – it has an atmosphere that extends far beyond Pluto! The northern lights, for example, are the result of the interaction of solar winds with the earth’s magnetic field. In a manner of speaking, we live inside the sun!