Dolphin

Dolphins are a widely distributed and diverse group of fully aquatic marine mammals. They are an informal grouping within the order Cetacea, excluding whales and porpoises, so to zoologists the grouping is paraphyletic. The dolphins comprise the extant families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the new world river dolphins), and Pontoporiidae (the brackish dolphins). There are 40 extant species of dolphins. Dolphins, alongside other cetaceans, belong to the clade Cetartiodactyla with even-toed ungulates, and their closest living relatives are the hippopotamuses, having diverged about 40 million years ago.

Dolphins range in size from the 1.7 metres (5.6 ft) long and 50 kilograms (110 lb) Maui's dolphin to the 9.5 metres (31 ft) and 10 metric tons (11 short tons) killer whale. Several species exhibit sexual dimorphism, in that the males are larger than females. They have streamlined bodies and two limbs that are modified into flippers. Though not quite as flexible as seals, some dolphins can travel at 55.5 kilometres per hour (34.5 mph). Dolphins use their conical shaped teeth to capture fast moving prey. They have well-developed hearing − their hearing, which is adapted for both air and water, is so well developed that some can survive even if they are blind. Some species are well adapted for diving to great depths. They have a layer of fat, or blubber, under the skin to keep warm in the cold water.

National Geographic

National Geographic or NatGeo may refer to:

See also

San Diego

San Diego /ˌsæn diːˈeɪɡoʊ/ (Spanish for "Saint Didacus") is a major city in California, on the coast of the Pacific Ocean in Southern California, approximately 120 miles (190 km) south of Los Angeles and immediately adjacent to the border with Mexico.

With an estimated population of 1,381,069 as of July 1, 2014, San Diego is the eighth-largest city in the United States and second-largest in California. San Diego is the birthplace of California and is known for its mild year-round climate, natural deep-water harbor, extensive beaches, long association with the U.S. Navy, and recent emergence as a healthcare and biotechnology development center.

Historically home to the Kumeyaay people, San Diego was the first site visited by Europeans on what is now the West Coast of the United States. Upon landing in San Diego Bay in 1542, Juan Rodríguez Cabrillo claimed the entire area for Spain, forming the basis for the settlement of Alta California 200 years later. The Presidio and Mission of San Diego, founded in 1769, formed the first European settlement in what is now California. In 1821, San Diego became part of newly independent Mexico, and in 1850, became part of the United States following the Mexican–American War and the admission of California to the union.

Dolphin Cove

Dolphin Cove may refer to:

Dolphin Show

The Dolphin Show is a non-profit student theatre organization that annually presents a large-scale student-produced musical theatre production at Northwestern University. The most recent annual production opened in January 2015 and was Titanic.

History

A group of Northwestern University men formed the Dolphin Club in 1939 to compete in Chicago area swimming meets. In 1940, the 15-member team held a swim carnival to raise money to attend a meet in Florida. The carnival and the meet were both successful, so the water show was repeated in 1941 and 1942. When World War II forced the cancellation of the annual Waa-Mu Show, the club combined their tradition with some students from Waa-Mu to present an evening of song and dance called the Dolphin Show. The 1944 Dolphin Show was a musical revue called "Wela Kahau" including women's water ballet and the men's Dolphin Club. Proceeds from this show bought war bonds. In 1948 audiences returned to see a musical-comedy revue around the original Patten Gymnasium pool. The Dolphin Show became jointly produced by the female Lorelei swimming club in 1949, but drifted away from its aquatic origin. The Dolphin Executive Board gave equal representation to both clubs who chose a theme for each year's show. In 1963 the production was no longer raising funds for the swim clubs. In 1964 the show presented Gilbert and Sullivan's The Mikado around the pool. In 1970, the group performed the musical Mame on stage at Cahn Auditorium.