Humans have irrevocably changed the planet. Have those processes gone so far that Earth’s biosphere has begun to resemble a human brain?
The discovery of a recent huge meteor crater beneath Greenland’s ice sheet has reignited a debate over cosmic influences.
Nature loves to riff on existing motifs, even in the most unearthly of environments.
Human history has always been linked to the influence of distant orbits, from climate change (past and present) to our exploration of the solar system.
We need to learn how to talk about possible signs of extraterrestrial intelligence.