Five things you didn't know about Christmas trees.

Ciekawy artykuł na stronie BBC.
Here are some the secrets of Christmas trees and their tough, tenacious lives.

• Christmas trees can turn to glass.
• Christmas trees are home to tarantulas.
• Christmas trees are as tall as trees can get.
• Christmas trees create their own ecosystem
• Christmas trees may struggle with future climates

Read more: http://www.bbc.com/earth/story/20141220-five-christmas-tree-secrets