The story of Eratosthenes and Earth’s circumference, as told by Carl SaganRion NakayaMarch 13, 2023March 7, 2024
Three proofs that Earth is round with NASA’s Michelle ThallerRion NakayaFebruary 9, 2021February 27, 2024
Earth’s Hydrosphere and Geosphere + Weathering and ErosionRion NakayaFebruary 15, 2019September 23, 2024
The Four Spheres (Geo, Bio, Hydro, & Atmo) with Crash Course KidsRion NakayaMay 4, 2015February 5, 2018