Now, this may be the single coolest video I've seen in a while. It's short so I'll let it do the talking. However, if the title alone didn't hook you, what it does is showcase the work of University of British Columbia professor Suzanne Simard, who explains how "trees in a forest ecosystem are interconnected with the largest, oldest 'mother trees' serving as hubs.
Trees Communicate With One Another, Connected by Fungi (Video)
The best 4 minute, 23 second video I've seen in a while. Prof Suzanne Simard from the University of British Columbia explains how trees communicate with one another, helping each other survive.