Meaningful communication is found across all life forms, from the signals sent by trees through fungal networks to the deep conversations we can have with each other. It's one feature that makes life uniquely different from a vast universe of non-living matter. But where does our ability to communicate come from? On this ID The Future, host Andrew McDiarmid continues his conversation with physicist and author Dr. Eric Hedin about the remarkable features that separate living systems from non-life. This is Part 2 of a two-part conversation. Look for Part 1 in a separate episode.