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The drinking bird is a heat engine that exploits a temperature difference to convert heat energy to a pressure difference within the device, and performs mechanical work. Like all heat engines, the drinking bird works through a thermodynamic cycle. The initial state of the system is a bird with a wet head oriented vertically.
A Japanese glass fishing float. Glass floats were once used by fishermen in many parts of the world to keep their fishing nets, as well as longlines or droplines, afloat.. Large groups of fishnets strung together, sometimes 50 miles (80 km) long, were set adrift in the ocean and supported near the surface by hollow glass balls or cylinders containing air to give them buoyancy.
Aquatic locomotion. A great cormorant swimming. Aquatic locomotion or swimming is biologically propelled motion through a liquid medium. The simplest propulsive systems are composed of cilia and flagella. Swimming has evolved a number of times in a range of organisms including arthropods, fish, molluscs, amphibians, reptiles, birds, and mammals.
The Eurasian oystercatcher is the lightest on average, at 526 grams (1 pound 2 + 1 ⁄ 2 ounces), while the sooty oystercatcher is the heaviest, at 819 g (1 lb 13 oz). [11] The plumage of all species is either all-black, or black (or dark brown) on top and white underneath.
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Witness Zoe Berger took the 32-second video of the fish on the sand struggling to make its way back into the water at Rockaway Beach. The shark could be seen aggressively twisting its body and ...
Tool use by non-humans is a phenomenon in which a non-human animal uses any kind of tool in order to achieve a goal such as acquiring food and water, grooming, combat, defence, communication, recreation or construction. Originally thought to be a skill possessed only by humans, some tool use requires a sophisticated level of cognition.
Here’s what ophthalmologists had to say about the risks associated with showering in contacts, how the practice can lead to eye infections, and other tips contact lens wearers should know to ...
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