Credits Sally Adee is an author and freelance science writer living in London. Her book, “We Are Electric: Inside the 200-Year Hunt for Our Body’s Bioelectric Code, and What the Future Holds,” was published in 2023. Photographs courtesy of the Eden Project. From a snarl of roots that grip dry, shallow soil, the knobbly trunk of an ancient olive tree twisted into a surprisingly lush crown of dense, silvery-green leaves. Far above, the retrofuturistic pattern of a geodesic dome framed the blue sky...