The ugliest of trades have their moments of pleasure. Now, if I was a grave digger, or even a hangman, there are some people I could work for with a great deal of enjoyment.

Around 2000 different types of plants are used by humans to make food.

While using energy from sunlight, plants turn carbon dioxide into food in a process called photosynthesis.

Tree resin which has been fossilized is known as amber, it sometimes contains plant material or small animals that were trapped inside.

Tungsten has a very high melting point, after carbon it has the second highest melting point of all elements.

Gold is shiny and doesn't corrode, this means it is a great metal for making jewelry.