Fairly recent studies have started to shed light on how plants communicate, including how they might "scream" to one another when cut down, but there's one tree that has an even more startling response to being sliced open...it bleeds.

Known around it's native Africa as Kiaat, Mukwa, and Minunga, the Pterocarpus angolensis is a kind of teak tree with an even more common name: the Bloodwood tree.

You see, severing one of the Bloodwood tree's branches results in the same kind of effect you might find if you chopped off a person's limb.

Upon receiving damage, the tree releases a deep crimson sap that looks alarmingly like human blood. In fact, its sole purpose is to coagulate and seal wounds, much like our own blood does. As you might imagine, this must have led to some pretty frightened lumberjacks.