A recent visit to Teotihuacán — the ancient Mesoamerican city in present-day Mexico, built by earlier cultures around 600 BCE and later rediscovered by the Aztecs — left me wonder-smitten by the see-saw of our search for truth and our search for meaning, by a peculiar confluence of chemistry, culture, and chance that unrinds the layers of reality to put us face to face with the mystery at its core. Situated at the foot of a dormant volcano, Teotihuacán stunned the Toltec settlers with the discovery of a lustrous black material partway between stone and glass, brittle yet hard, breathlessly … Continue reading Obsidian and the Birds: An Odyssey of Wonder from the Aztecs to the Quantum World