Nautilus - Wikipedia
网页The nautilus shell presents one of the finest natural examples of a logarithmic spiral, although it is not a golden spiral. The use of nautilus shells in art and literature is covered at nautilus shell.
Chambered nautilus - Wikipedia
网页The chambered nautilus (Nautilus pompilius), also called the pearly nautilus, is the best-known species of nautilus. The shell, when cut away, reveals a lining of lustrous nacre and displays a nearly perfect equiangular spiral, although it is not a golden spiral. The shell exhibits countershading, being light on the bottom and dark on top.
What is a nautilus? - NOAA's National Ocean Service
网页2024年6月16日 · The chambered or pearly nautilus is a cephalopod (a type of mollusk)—a distant cousin to squids, octopi, and cuttlefish. Unlike its color-changing cousins, though, the soft-bodied nautilus lives inside its hard external shell. The shell itself has many closed interior chambers or “compartments.”
What’s special about the shape of a Nautilus shell? - EarthSky
网页2013年4月18日 · Who is Fibonacci, and how does his work relate to the shape of a Nautilus shell? Cutaway of a Nautilus shell showing the chambers arranged in an approximately logarithmic spiral. Chambered ...
Nautilus - American Oceans
网页The nautilus is one of the most fascinating creatures of the deep sea, with a unique spiral shell and a mysterious behavior that has captivated scientists and enthusiasts for centuries. Despite being one of the oldest living species on the planet, the nautilus remains largely unknown and understudied, with many aspects of its biology and ...
Seashell - Wikipedia
网页A seashell or sea shell, also known simply as a shell, is a hard, protective outer layer usually created by an animal or organism that lives in the sea. Most seashells are made by mollusks, such as snails, clams, and oysters to protect their soft insides. [1]
Nautilus Shell – Minecraft Wiki
网页A nautilus shell is an item that is used for crafting conduits. Nautilus shells can be rarely obtained as a treasure item from fishing. The drop chances of nautilus shells slightly increase with each level of Luck of the Sea on the player's fishing rod.
Nautilus | Mollusk, Shell, Subclass | Britannica
网页Nautilus, either of two genera of cephalopod mollusks: the pearly, or chambered, nautilus (Nautilus), to which the name properly applies; and the paper nautilus (Argonauta), a cosmopolitan genus related to the octopus. The pearly nautilus has a smooth, coiled external shell about 25 cm (10 inches)
Seashell | Definition, Types, & Facts | Britannica
网页2024年8月19日 · Seashell, hard exoskeleton of marine mollusks such as snails, bivalves, and chitons that serves to protect and support their bodies. It is composed largely of calcium carbonate secreted by the mantle, a skinlike tissue in the mollusk’s body wall. Seashells are usually made up of several layers of
Nautilus Shells: Parts of a Shell - YouTube
网页2022年3月8日 · The chambered shell of nautilus have inspired innovation and art for centuries. This video gives background on nautilus and breaks down the key features of t...
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