Richard Dixon Oldham

Richard Dixon Oldham was a pioneering geologist and seismologist in the early 20th century who studied earthquakes and the Earth's interior. He is best known for discovering the existence of the Earth's inner core and understanding the structure of Earth's layers, including the crust, mantle, and core. Oldham analyzed seismic waves from earthquakes to reveal how they travel through the Earth, helping scientists learn about its composition and dynamics. His work significantly advanced the understanding of Earth's internal structure, laying the foundation for modern seismology and geophysics.