Portfolio: Eratosthenes Measured Earth (Animation) by Randy Russell | Feb 1, 2021 | animation, astronomy, Earth science, portfolio The Greek astronomer, mathematician and geographer Eratosthenes of Cyrene (276-194 BC) was the... Read More
Mars Helicopter Lesson Plan by Randy Russell | Jan 20, 2021 | curriculum, space, space missions NASA’s Mars 2020 Mission, featuring the Perseverance rover, landed on Mars on February 18,... Read More