1387-1513 - A technical cave diver using a diver propulsion vehicle (DPV) to dive into the Blue Springs state park cave system near Marianna, Florida.

1387-1351 - Scuba diver on her underwater propulsion vehicle getting a close-up look at an upside-down jellyfish, Bonaire, Caribbean Netherlands.

1387-1331 - Scuba diver navigates the waters using a diver propulsion vehicle off the coast of Bonaire, Caribbean Netherlands.

1387-1312 - Scuba diver uses a diver propulsion vehicle to navigate the waters off the coast of Bonaire, Caribbean Netherlands.

685-2983 - SpaceX Rocket Launch, United States of America

832-401836 - Single windmill turbine and small traditional Greek Orthodox chapel or church and road to them in colorful landscape on hilltop against blue sky with some cloulds on clear sunny summer day. Crete, Greece, Europe

832-399639 - Renewable wind and solar energy. Wind turbine next to photovoltaic system on hill

832-398231 - Windmills on a wind farm near Zahara de los Atunes, aerial view, drone shot, Cadiz province, Andalusia, Spain, Europe

832-398230 - Windmills on a wind farm near Zahara de los Atunes, aerial view, drone shot, Cadiz province, Andalusia, Spain, Europe

832-395873 - Wind turbines at blue hour in winter landscape, Ronsberg, Ostallgaeu, Bavaria, Germany, Europe

832-395879 - Burbo Bank offshore wind farm in Liverpool Bay, United Kingdom, Europe

832-395878 - Burbo Bank offshore wind farm in Liverpool Bay, United Kingdom, Europe

832-395475 - Wind turbines illuminated by the sun and forest rising from cloud cover, sunset, Koeterberg, Luegde, Weserbergland, North Rhine-Westphalia, Germany, Europe

832-395872 - Wind turbines at blue hour in winter landscape, Ronsberg, Ostallgaeu, Bavaria, Germany, Europe

1349-787 - GOCE Satellite's Electric Ion Propulsion

832-391742 - Old turbines in the Hydroelectric power station Unesco world heritage Industrial site Rjukan-Notodden, Norway, Europe

832-384409 - Charging plug on electric car, car being charged at charging station, Germany, Europe

832-384408 - Charging plug on electric car, car being charged at charging station, Germany, Europe

832-384578 - Charging station for electric cars with charging cable, Germany, Europe

832-381605 - Freediver swimming with underwater scooter, Red Sea, Egypt, Africa

832-381061 - Freediver swims with underwater scooter near a shipwreck, Red Sea, Egypt, Africa

857-95430 - Jet engine of airplane flying over wind farm, Scotland, UK

857-94863 - Pierre Le Coq preparing his windsurfing gear on a jetty near his van at Plouguerneau, Brittany, France.

857-94867 - Pink Granite CoastPierre Le Coq riding his windsurf board during a sunset session on the "Cote de Granit Rose" ( Pink Granite Coast ), Trégastel, Brittany, France.

857-94864 - Pierre Le Coq carries his windsurfing board over his head on a jetty at Plouguerneau, Brittany, France.

857-94865 - Pierre Le Coq carries his windsurfing board on a jetty at Plouguerneau, Brittany, France.

857-94866 - Pierre Le Coq performing a jibe with his windsurf board at Plouguerneau, Brittany, France.

857-87022 - 49 and 49erFX training in preparation for the ISAF world in Santander, Spain.

857-87014 - 49 and 49erFX training in preparation for the ISAF world in Santander, Spain.

857-87034 - 49 and 49erFX training in preparation for the ISAF world in Santander, Spain.

857-87011 - 49 and 49erFX training in preparation for the ISAF world in Santander, Spain.

857-87003 - 49 and 49erFX training in preparation for the ISAF world in Santander, Spain.

857-87016 - 49 and 49erFX training in preparation for the ISAF world in Santander, Spain.

857-87020 - 49 and 49erFX training in preparation for the ISAF world in Santander, Spain.

857-87008 - 49 and 49erFX training in preparation for the ISAF world in Santander, Spain.

832-341068 - Cog wheels

832-350384 - Damaged turbine of B 52 Bomber

832-334420 - Rusty cogwheel, gearwheel, detail

832-308984 - Production, BMW motorcycle factory in Berlin, Germany

832-308985 - Production, BMW motorcycle factory in Berlin, Germany

832-308986 - Production, BMW motorcycle factory in Berlin, Germany

832-308987 - Production, BMW motorcycle factory in Berlin, Germany

832-284259 - Mill museum the 7 mills, Pfarrwerfen, Salzburg, Austria

832-284257 - Mill museum the 7 mills, Pfarrwerfen, Salzburg, Austria

832-277899 - Small steamship, Bremerhaven, Bremen, Germany

832-169022 - Rocket man Troy Widgery at the 2009 Avalon Air show, Melbourne, Victoria, Australia

832-138765 - Ship propeller on an old fishing boat in dry dock, port of Hvide Sande, Denmark, Europe

832-117291 - Alternators, Department of Power Engineering, Deutsches Museum German museum, Munich, Bavaria, Germany, Europe

832-117290 - Revolving-field machine by Siemens and Halske in 1887, Department of Power Engineering, Deutsches Museum German museum, Munich, Bavaria, Germany, Europe