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Stony Brook, New York, United States 
Fossil shells of Balanus from Pliocene
This genus is known in the fossil record from the Jurassic to the Quaternary periods (age range: from 189.6 to 0.0 million years ago.). Fossil shells within this genus have been found all over the world.
The bodies of these organisms are totally enclosed by a stony gray-whitish shell. The size of these shells ranges from 5 millimeters to 10 centimeters. They take the form of a cone consisting of six plates fixed on the rocks. The active animal can only be observed within the water when the shell opens and the barnacles expose two branched appendages (cirri ) regularly hitting the water to catch food. They mainly feed on plankton.
The Panzer IV was the most widely manufactured German tank of the Second World War, with some 8,500 built. The Panzer IV was used as the base for many other fighting vehicles, including the Sturmgeschütz IV assault gun, Jagdpanzer IV tank destroyer, the Wirbelwind self-propelled anti-aircraft gun, and the Brummbär self-propelled gun.
The Panzer IV saw service in all combat theaters involving Germany and was the only German tank to remain in continuous production throughout the war. Upgrades and design modifications, intended to counter new threats, extended its service life.
It also had wondeful tiddies and buttholy.