IN A NUTSHELL 🌲 A perfectly preserved ancient tree revealed insights into a magnetic field reversal 42,000 years ago. 📊 The Laschamps Excursion caused dramatic environmental changes, including increased ultraviolet radiation. 🎨 The event may have influenced early human behavior, leading to a rise in cave art and the use of red ochre as sunscreen. … Continue reading “3,000 years of secrets unlocked”: this ancient tree exposes Earth’s incredible magnetic field reversal history