For all of its power and global scale, it’s possible the largest and most important social media network on our planet isn’t the World Wide Web. Instead, scientists have identified and studied underground communication systems--made of fungi and roots—that enable trees to exchange nutrients, nurture their offspring, transmit warnings, and relay information to their neighbors. These networks (collectively nicknamed the Wood Wide Web) link an estimated 90% of our planet’s vegetation. Explore this incredible phenomenon and marvel at another crucial provision for life on Earth.

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