Andrew Ellicott Douglass

Andrew Ellicott Douglass was an American astronomer and scientist who pioneered the study of tree rings to understand Earth's past climate. By examining patterns in tree ring widths, he developed the method of dendrochronology, which allows scientists to date historical events and climate changes accurately. Douglass’s work helped establish the scientific basis for tracking long-term climate variations, providing valuable insights into natural environmental changes over centuries. His contributions significantly advanced the fields of astronomy and climate science, making him a key figure in understanding Earth's environmental history through natural recorders like trees.