13600095 - Wave-cut platform from above13672185 - Cliffs in Sisteron, Alpes de Haute Provence, France13499117 - Alternator, illustration13475510 - Chimpanzees grooming fur and picking off fleas, illustration13472824 - Zebraite13688145 - Alternating hemiplegia of childhood, conceptual image11717234 - Pyrite dodecahedrons I12395094 - Photovoltaic power plant - inverters11717198 - Pyrite dodecahedrons II11712029 - Multipurpose meter shunts12395089 - Photovoltaic power plant - inverters11722233 - Perpetual motion machine11712030 - Multipurpose meter shunts13311552 - Blue ball in middle of three red cups11878608 - Children playing14166193 - Magnetic induction motor at Nikola Tesla exhibition11892456 - Electrical plugs11737054 - Large hailstone