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Aphrodite. Greek mythology. Sculpture. Aphrodite is the Greek goddess of love and beauty.
12 Greek Gods and Goddesses
Black widow spider
9 of the World’s Deadliest Spiders
Lusitania sinking, illustration from The War of the Nations (New York), December 31, 1919. World War I, WWI. This image is one of three on the page. (See source file for the other two.)
7 of the World’s Deadliest Shipwrecks
The Colosseum, Rome, Italy. Giant amphitheatre built in Rome under the Flavian emperors. (ancient architecture; architectural ruins)
New Seven Wonders of the World
Ahura Mazda - relief of the Zoroastrian god Ahura Mazda at the ancient ruins of Persepolis in Iran. Also known as Ormazd Zoroastrianism,
Which Religion Is the Oldest?
United States electoral college map showing number of electoral votes by state.
How Does the Electoral College Work?
American bison (Bison bison) also known as buffalo or plains buffalo on the prairie, western U.S.
What’s the Difference Between Bison and Buffalo?

growth ring

zoology

Learn about this topic in these articles:

characteristic of fish

  • scale
    In scale

    …in shape, and they exhibit growth rings. Ctenoid scales resemble cycloid scales but have comblike teeth on their overlapping edge.

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  • types of fish scales
    In integument: Fishes

    …arranged in an overlapping pattern; growth rings are evident on the free edges. Ctenoid scales are similar to cycloid, except that they have spines or comblike teeth along their free edges; these scales are characteristic of the higher bony fishes—perches and sunfishes, for example. Some fishes, such as catfishes and…

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