Happy #PiDay! Sphere V=(4/3)πr^3. Check out something spherical: the Moon, & its geology http://t.co/4T6NRHTTub pic.twitter.com/YGAUWU2OSy
— USGS Pubs Warehouse (@USGS_Pubs) March 14, 2015
Happy #PiDay! Sphere V=(4/3)πr^3. Check out something spherical: the Moon, & its geology http://t.co/4T6NRHTTub pic.twitter.com/YGAUWU2OSy
— USGS Pubs Warehouse (@USGS_Pubs) March 14, 2015