30 Nov, 2017 00:19 a.m. EST
Jennifer Jo Stock / National Geographic Photo Contest 163 Jonathon Carr-Brown / National Geographic Photo Contest 163 Stas Bartnikas / National Geographic Photo Contest 1920 163 Ian Duncan / National Geographic Photo Contest 163 Katie Sheppard / National Geographic Photo Contest 163 Melissa Nordan / National Geographic Photo Contest 163 Simon Smith / National Geographic Photo Contest 163 Andy Chisholm / National Geographic Photo Contest 163 Daniele Boffelli / National Geographic Photo Contest 163