Today, you’ll learn about a record-breaking deep drill into the Earth’s mantle, the new science behind the ancient Chinese diagnostic practice of tongue examination, and how a new discovery at Stonehenge is opening up yet more mysteries.   Mantle Drill  “Geologists drill 1.2 km into rare rocks from Earth’s mantle.” by Michael Irving. 2024.  “Internal Structure of Earth: Crust, Mantle & Core, Discontinuities.” Rau’s IAS. 2024. “Earth’s layers: Exploring our planet inside and out.” by Daisy Dobrijevic. 2023.  “A long section of serpentinized depleted mantle peridotite.” by C. Johan Lissenberg, et al.   Tongue Exam  “Say ‘aah’ and get a diagnosis on the spot: is this the future of health?” University of South Australia. 2024.  “Tongue Disease Prediction Based on Machine Learning Algorithms.” by Ali Raad Hassoon, et al. 2024.   Stonehenge Discovery  “Stonehenge’s Strangest Rock Came From 500 Miles Away.” by Meghan Bartels. 2024.  “A Scottish provenance for the Altar Stone of Stonehenge.” by Anthony J. I. Clarke, et al. 2024.   Follow Curiosity Daily on your favorite podcast app to get smarter with Calli and Nate — for free! Still curious? Get exclusive science shows, nature documentaries, and more real-life entertainment on discovery+! Go to https://discoveryplus.com/curiosity to start your 7-day free trial. discovery+ is currently only available for US subscribers. Hosted on Acast. See acast.com/privacy for more information.