Like Download 1.53 MB ammonite 2730 x 1820 pixels Aspect ratio 3:2 Canon PowerShot SX710 HS 13.921 mm f/4.5 1/13 s ISO 1600 Online since: 19 December 2018 Taken: 15 October 2017 CC0 / Public Domain ammonite fossil shell spiral petrified nautilus design