Gary K. Smith / Tourists walking across the stepping stones, Dovedale, Peak District National Park, Derbyshire, England, UK, July 2015.

LYNN M. STONE / Royal Terns (Thalasseus maximus) stepping toward and then around each other in courtship ritual. Gulf of Mexico beach, St. Petersburg, Florida, USA, April.

LYNN M. STONE / Bengal tiger {Panthera tigris tigris} amongst bamboo stepping into water, captive

LYNN M. STONE / Bengal tiger {Panthera tigris tigris} amongst bamboo stepping into water, captive

LYNN M. STONE / Bengal tiger {Panthera tigris tigris} amongst bamboo stepping into water, snarling, captive

LYNN M. STONE / Bengal tiger {Panthera tigris tigris} amongst reeds, stepping into water, captive

LYNN M. STONE / Bengal tiger {Panthera tigris tigris} amongst reeds, stepping into water, captive

Mike Read / Red ant (Myrmica rubra) colony found under a garden stepping stone, Ringwood, Hampshire, England, UK, April.