Forest trees can 'talk' to each other and share nutrients through an underground network built by roots and soil fungi.
Trees planted around buildings can reduce air conditioning costs/needs by 30%.
A mature tree can eliminate almost 70X more pollution than a newly planted tree.
A single tree produces around 260 pounds of oxygen per year. Two fully grown trees can produce enough oxygen to support a family of four!
One tree can absorb the equivalent amount of carbon in a year that a car produces by driving 26,000 miles.
Earth has more than 60,000 known tree species. Most reside in rainforests.
Before trees, Earth was home to a strange genus of fungi that grew to be around 26 feet tall.
Some trees emit chemicals that attract enemies of their enemies, so as to let other species fight it out as a form of protection.
Adding one tree to an open pasture can increase its bird population and diversity from almost zero to as high as 80 species.
Most tree roots stay near the top 20 inches of soil, but they can also grow above ground or dive a hundreds of feet deep into the ground.
Trees can be male, female or hermaphrodite.
Trees can act as compasses, with moss growing mostly on the north side of the tree in northern hemispheres and mostly on the south side in southern hemispheres.
Fungus helps trees grow.
Stress makes trees stronger.