John Dos Pasos essays

John Dos Pasos essays There are few authors that have contributed greatly to American literature. One of these authors that have accomplished this task is John Dos Passos. He is considered to be one of the greatest novelists of all time. He shared his wide range of political views in such classic works as the U.S.A. trilogy. John Dos Passos helped the country through the progressive era and other social upheavals into the Industrial Revolution through his works. He is widely considered one of the greatest American authors ever. John Dos Passos was born January 14, 1896 in Chicago, Illinois. He was the illegitimate son of a widow, of Portuguese decent. His father was Portuguese also and worked as a successful lawyer. raised by his father, Dos Passos was brought up in the Catholic tradition. Throughout his childhood, he traveled in Europe and North America receiving a good education. After touring Europe and America, Dos Passos, then attended Harvard University. He graduated Cum Laude in 1916. Soon after college he volunteered as an ambulance driver in World War I. During this time he discovered his ability to write, and eventually this lead to his writing his famous trilogy. U.S.A. The U.S.A. trilogy describes the history of the United States from 1900 to 1930. Dos Passos took interest in Republican politics, which was reflected in his early works. During his illustrious career he was a member in many organizations such as American Arts and Letters, and he founded and he founded the New Masses in 1926. Dos Passos was greatly affected by the trial of Sacco and Vanzetti, in which he was unsuccessful at gaining their pardon. After this affair he worked as a correspondent for Life magazine and for the government in Central America. He then worked as a lawyer until his death in September 28, 1970 of an apparent heart attack. Dos Passos died in Baltimore, Maryland at the age of 74. John Dos Passos is widely...

Killer Whale Dorsal Fin Collapse

Killer Whale Dorsal Fin Collapse For some time, theres been a heated debate about why  killer whales in captivity have dorsal fins that are flopped over or collapsed. Animal-rights activists say that these fins collapse because the conditions under which killer whales - or  orcas - are held in captivity are not healthy. Others, such as water parks that keep killer whales in captivity and use them in theme-park shows, argue that there are no health threats to killer whales held in captivity and that dorsal fin collapse is natural. The Lowdown on Dorsal Fins All killer whales have a dorsal fin on their back, but the males dorsal fin is much taller than a females and can grow up to 6 feet tall. Despite the fact that the dorsal fin is very straight, it is supported not by bone but a fibrous connective tissue called collagen. All males in captivity have collapsed dorsal fins, but the condition, also known as dorsal fin collapse, flaccid fin, or folded fin syndrome, ​does occur in many captive females. Scientists are not certain why orcas have dorsal fins or what purpose the appendages serve. But, there is some speculation.  Whales Online  says that the large dorsal fin enhances the hydrodynamics of killer whales: (The dorsal fin) helps them slip through the water more efficiently. Similar to the ears of elephants or the tongues of dogs, dorsal, caudal and pectoral fins also help eliminate excess heat during intense activities such as hunting. Orca Live  agrees that the fins help regulate a killer whales body temperature: Excess heat, generated as they swim along, is released into the surrounding water and air via the dorsal fin - much like a radiator! Though there are different theories about their specific purpose, its a fact that dorsal fin collapse is far more prevalent in whales that are held in captivity. Dorsal Fin Collapse A wild orca often travels far, and quickly, in deep water. The water provides pressure to the fin, keeping the tissues inside healthy and straight. One theory as to why dorsal fins collapse in captivity is because the orca spends much of its time at the water surface and doesnt swim very far. This means that the fin tissue gets less support than it would if the orca were in the wild, and it starts to fall over. The whales also often swim in a repetitive circular pattern. Other potential causes for fin collapse may be dehydration and overheating of fin tissue  due to  warmer water and air temperatures, stress due to captivity or changes in diet,  reduced activity that causes low blood pressure, or age. SeaWorld of Hurt, a website operated by animal rights organization PETA, takes this stance, noting that dorsal fins of captive whales likely collapse Because they have no space in which to swim freely and are fed an unnatural diet of thawed dead fish. SeaWorld claims that this condition is common - however, in the wild, it rarely ever happens and is a sign of an injured or unhealthy orca. SeaWorld announced in 2016 that it would stop breeding whales in captivity immediately and  phase out killer whale shows  at all its parks by 2019. (In San Diego, the shows ended in 2017.) The company has said, however, that the shape of a killer whales dorsal fin is  not an indicator of its health. The dorsal fin is a structure like our ear, said Dr. Christopher Dold, SeaWorld’s head veterinarian: It doesnt have any bones in it whatsoever. So our whales spend a lot of time at the surface, and accordingly, tall, heavy dorsal fins (of adult male killer whales) without any bone in it, will slowly bend over and assume a different shape. Wild Orcas While less likely, it is not impossible for a wild orcas dorsal fin to collapse or become bent, and it may be a trait that varies among whale populations. A study of killer whales in New Zealand showed a relatively high rate - 23 percent - of collapsing, collapsed, or even bent or wavy dorsal fins. This was higher than that observed in populations in British Columbia or Norway, where only one male from the 30 studied had a fully collapsed dorsal fin, the study said. In 1989, the dorsal fins of two male killer whales collapsed after exposure to oil during the  Exxon Valdez  oil spill- the whales collapsed fins were thought to be a sign of poor health, as both whales died soon after the collapsed fins were documented. Researchers have theorized that dorsal fin collapse in wild whales may be due to age, stress, injury, or altercations with other killer whales.   Sources Matkin, C. O., and E. Saulitis. 1997. Restoration Notebook: Killer Whale (Orcinus orca). Exxon Valdez Oil Spill Trustee Council, Anchorage, Alaska.  National Marine Fisheries Service Northwest Regional Office. 2005. Proposed Conservation Plan for Southern Resident Killer Whales, ). orcaOrcinusVisser, I.N. 1998. Prolific Body Scars and Collapsing Dorsal Fins on Killer Whales (Orcinus orca) in New Zealand Waters. Aquatic Mammals  24.2,71-81.