Fish with mayo and panko out these retro videos from Encyclopedia Britannica’s archives. WTFact Britannica shares some of the most bizarre facts we can find.

In Demystified, Britannica has all the answers to your burning questions. In these videos, Britannica explains a variety of topics and answers frequently asked questions. Britannica is the ultimate student resource for key school subjects like history, government, literature, and more. While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.

Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians. We’ve created a new place where questions are at the center of learning. Britannica Presents Earth’s To-Do List for the 21st Century. Learn about the major environmental problems facing our planet and what can be done about them! While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.

Our editors will review what you’ve submitted and determine whether to revise the article. Articles from Britannica Encyclopedias for elementary and high school students. A fish is any of approximately 34,000 species of vertebrate animals. The term fish is applied to a variety of vertebrates of several evolutionary lines. It describes a life-form rather than a taxonomic group. When a fish sleeps, it exists in a seemingly listless state in which the fish maintains its balance but moves slowly. If attacked or disturbed, most fish can dart away.

A few kinds of fish lie on the bottom to sleep. Most fish do not have eyelids, so they cannot close their eyes to sleep. The organs of hearing in fish are entirely internal, located within the skull, on each side of the brain, and somewhat behind the eyes. Sound waves, especially those of low frequencies, travel readily through water and impinge directly upon the bones and fluids of the head and body to be transmitted to the hearing organs. As members of the phylum Chordata, fish share certain features with other vertebrates. Fishes are of interest to humans for many reasons, the most important being their relationship with and dependence on the environment. This resource, once thought unlimited, is now realized to be finite and in delicate balance with the biological, chemical, and physical factors of the aquatic environment.