American and British English, while sharing many similarities, deviate from each other linguistically in many ways – from spelling to pronunciation to word choice. One thing they have in common, however, is that both versions of the language have undergone significant changes since first spoken.

Glasses correct our vision by bending the light that enters our eyes. Most people have eyes with different needs; each eye requires a different prescription. The perfect glasses work by focusing the image onto the retina, not only allowing you to see more, but by reducing eye strain as well.

Although lightning bolts appear huge, they are actually just two to three centimetres wide at an average length of three kilometres. But mighty they are: at 30,000 °C, the heat generated by lighting is five times hotter than the surface of the sun!