860-290259 - BLUE DRAGON (Glaucus atlanticus). A small peacic slug that measures only about 2 cm and is generally associated with the Portuguese frigatebird (Physalia physalis) or the blue button (Porpita porpita) on which it feeds. They can also appear in intertidal pools. Marine invertebrates of the Canary Islands, Tenerife.
832-252608 - View from Knopfmacherfelsen (button-makers rocks) in the Danube Valley in the direction of Beuron, Upper Danube Nature Park, Donaubergland, Baden-Wuerttemberg, Germany, Europe
832-125625 - Old control box with buttons, Huettenwerk Meiderich steel mill after closure, today Duisburg-Nord Landscape Park, North Rhine-Westphalia, Germany, Europe
857-13851 - Plutonium button Plutonium metal button at Rocky Flats, CO. It consists on 98 percent plutonium and the rest other metals. Terri Coleman is the process specialist who is holding the button and using a brush to clean off oxide.