Many mammals sleep for a large proportion of each 24-hour period when they are very young. However, killer whales and some other dolphins do not sleep during the first month of life. Instead, young dolphins and whales frequently take rests by pressing their body next to their motherâs while she swims.
typhoon meaning, definition, what is typhoon: a violent wind that has a circular movement, found in the West Pacific Ocean: . Learn more.
A tsunami (plural: tsunamis or tsunami; from Japanese: æ´¥æ³¢, lit. harbor wave; English pronunciation: /tsuËËnÉËmi/) , also known as a seismic sea wave, is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake.he term tsunami, meaning harbor wave in literal translation, comes from the Japanese æ´¥æ³¢, composed of the two kanji æ´¥ (tsu) meaning  harbor  and æ³¢ (nami), meaning  wave . (For the plural, one can either follow ordinary English practice and add an s, or use an invariable plural as in the Japanese.