The Magic Of Reality

along threads called chromosomes (we humans have forty-six chromosomes, fruit flies have eight)

Even when you look at a friend’s face you are seeing them in the past, because the light from their face takes a tiny fraction of a second to travel to your eye.

Nowadays, we know that genes – the units of heredity – are made of stuff called DNA.

Scientists talk about ‘forces’ and ‘bonds’ and ‘fields’, which act in their different ways both to keep the ‘footballs’ apart and to keep the components of each ‘football’ together. And it is those forces and fields that make things feel solid

A group of atoms joined together to make a compound is called a molecule.