Understanding planetary intelligence
Adam Frank, Sara Walker, and David Grinspoon write: Almost a century ago, the revolutionary idea of the biosphere gained a foothold in science. Defined as the collective activity of all life on Earth—the tapestry of actions of every microbe, plant, and animal—the biosphere had profound implications for our understanding of planetary evolution. The concept posits that life acts as a potent force shaping how the planet changes over time, on par with other geological systems like the atmosphere, hydrosphere (water),…