Trees and shrubs are perennials which means that they don't die in winter, they just keep on going.
Trees are the longest living organisms on earth - the ancient bristlecone pines in the USA are up to 4000 years old.
Britain's oldest tree is thought to be the Fortingall Yew in Tayside, which is believed to be over 3000 years old. Britain is thought to have the largest population of 'ancient' trees in Europe.
Dendrochronology is the science of calculating a tree's age by counting the rings inside its trunk.
The tallest trees in the world are the Giant Redwoods in California, which can grow to about 112m, and the Eucalyptus in Australia, which can reach 107m.
Trees can make you feel better too, and hospital patients who have windows that look out on to trees heal faster, require shorter stays, and less painkillers.
The smelliest tree in the world is said to be the Ginkgo, which is why it has earnt the nickname The Stink-Bomb Tree.
Rainforests once covered 14% of the earth's land surface. Now they cover just 6% and experts estimate that the last remaining rainforests could be consumed in less than 40 years.
Nearly half of the world's species of plants, animals and micro organisms will be destroyed or severely threatened over the next quarter century due to rainforest deforestation.