Sex, Drugs, Disasters, and the Extinction of Dinosaurs by Stephen Jay G

â€Å"Sex, Drugs, Disasters, and the Extinction of Dinosaurs† is written by Stephen Jay Gould, professor of geology and zoology at Harvard. This essay is one of more than a hundred articles on evolution, zoology, and paleontology published by Gould in national magazines and journals. It tells about scientific proposals for the extinction of dinosaurs – a confusing but an exciting problem that humanity tries to solve. By analyzing and describing each of the claims for the reptiles’ demise – sex, drugs, and disasters – Gould differentiates bad science from good science and explains what makes some theories silly speculations, while the other, a testable hypothesis. Any hypothesis, Gould says, begins with the collection of facts. In this early stage of a theory development bad science leads nowhere, since it contains either little or contradicting evidence. On the other hand, Gould suggests, testable proposals are accepted temporarily, furthermore, new collected facts confirm a hypothesis. That is how good science works. It is self-correcting and self-developing with the flow of time: new information improves a good theory and makes it more precise. Finally, good hypotheses create logical relations to other subjects and contribute to their expansion. The disaster theory, Gould claims, is an example of good science. It has testable evidence and has an impact on studies in other fields of science, it develops further and explains why the extinction of dinosaurs occurred simultaneously with other events. This theory suggests that a large comet hit the Earth sixty five million years ago, causing the cloud of dust to rise into the sky and to block sunlight. As a result, world temperatures went down significantly, the ice age bega... ...r optimum temperatures, hot climate caused the dinosaurs to heat up beyond their optimum. However, the heat didn’t kill them, but sterilized the males, because their testes functioned at certain temperatures. Gould argues that this theory is untestable, and the experiments with the influence of extreme temperatures on modern alligators do not necessarily explain the extinction of dinosaurs. Furthermore, many questions are not answered because of the absence of evidence. Gould states that this theory is another example of bad science. Sex, drugs, and disasters are both popular topics that grab public attention and scientific theories of the extinction of dinosaurs. While sex and drug hypotheses represent silly speculations, the disaster claim is good science: it provides testable evidence, has an impact on other scientific fields, and generates continuous research.

Microscopes and Microscopy

Microscopes and Microscopy Introduction The purpose for including a lab on microscopy in his course is because it is a very important tool in making detailed observations. This lab helps the average person realize that there is much more to things than what you see with the naked eye. In the field of human biology microscopes are very important for many reasons. In the late 1500’s a scientist named Zacharias Janssen created the first microscope of it kind and now we have several microscopes that are very important to the study of human biology. The compound microscope is used to view individual cells as well as living cells such as hair. Electron microscopes can be used to view things such as biological tissues and organisms. Also, another popular microscope used in human biology is the stereo microscope, which is commonly used to dissect and examine human tissue. Discussion When studying the â€Å"optics† slide in the interactive section of this lab it displayed image orientation. To display this it took the letter â€Å"e† and showed you the standard view to the naked eye and then it showed you the view through a light microscope and it looked very different. The â€Å"e† was upside down and backwards left while looking down in the microscope. The reason it looked like this was because of the shape and lenses in the microscope. While studying the color threads on the interactive microscope you notice that the colors are red, green, and yellow from top to bottom. The magnification that was useful in helping me determine the order was 400x. This magnification allowed me to see that the yellow color thread was on the bottom and that the green color thread was in the middle. The optical principles that are in play here are perfect lens characteristic and transmitted light microscopy optical pathways. Interpupillary distance is the distance between the centers of the pupils of the two eyes. The way to determine what the interpupillary distance is with a device called a pupil meter. This device presents a binocular subject that can be set from a close viewing distance out to optical infinity. The diopter setting is a control knob on a microscope that helps your eyes view something similar in proper relation instead of allowing each individual eye to view the subject differently. It is necessary to locate an object using the low objective because it allows you to gain a better focus before switching to the high power objective and makes it so you don’t have to make much of an adjustment on the high power objective. Just trying to focus using the high power objective could get very time consuming. Reducing the iris diaphragm aperture on a microscope will clarify an image focused under high power, but it would be letting less light in the field of view. The reason it would clarify the image is because under high power it doesn’t take much light to bring whatever you are viewing into focus due to the strength of the lens. If my lab partner was having problems locating onion cells using a parfocal microscope with the low power objective and just switched to the high power objective I would tell her that this is an incorrect way to bring the onion cells into focus. I would advise her that she would need to continue to bring the onion cell into focus with the low power objective because once you have it in focus with the low power objective you can switch to the high power objective with out making any changes to the focus. I am striving to become a nurse and I believe that in that career field it is extremely important for me to be especially knowledgeable regarding microscopy. While working as a nurse it is going to be extremely important for me to know what microscopes are going to be best to use in certain circumstances. For my career field it is going to be very important to understand how to use a microscope and that goes for knowing how to bring cells into more focus as well as knowing that I need to bring what I am viewing into focus under the low power objective.

Women Characters in The White Queen (Wars of the Roses)

In June, 2013, BBC One debuted a 10-part series, The White Queen, a depiction of the Wars of the Roses seen through the eyes of key women, and based on a series of historical novels by Philippa Gregory. The White Queen refers to Elizabeth Woodville, and The White Queen is the title of Gregorys first book in the series that is being adapted. Dont expect it to be exactly history -- but Gregory has respect for history, and that will likely show through in the series as well, even though there will be lots of poetic license taken. The other books in the series are The Red Queen  (about Margaret of Anjou), The Kingmakers Daughter  (about Anne Neville),The Lady of the Rivers (about Jacquetta of Luxembourg), The White Princess  (about Elizabeth of York)  and  The Kings Curse  (about Margaret Pole.) The sequel BBC One series,  The White Princess,  debuted in 2017. You can also see this as something of a prequel to the popular series, The Tudors. Elizabeth Woodville was the grandmother of King Henry VIII, featured in that series. Here are some of the women youll likely encounter in the series, and some of their interconnections -- youll see why Gregory called the series on the Wars of the Roses The Cousins War -- many close relatives found themselves on opposite sides. Many of the key characters traced their ancestry to the sons of Edward III of England, or to other kings of England. The White Queen and Her Family Elizabeth Woodville (1437 - 1492), widow of Sir John Grey who was on the Lancastrian side in the Wars of the Roses, and who was killed in the battle at St. Albans. The legend of her meeting with Edward IV under an oak tree by the side of a road is a very early one. That they secretly married and thwarted the marriage plans for Edward being made by Edwards uncle, the Earl of Warwick (known as the Kingmaker), is historical. One of her sons by John Grey was an ancestor of Lady Jane Grey.Jacquetta of Luxembourg, mother of Elizabeth Woodville, was a descendant of Englands King John. Her father was a French count. Jacquettas first husband was the brother of Henry V. She had no children by that first marriage, but at least ten by her second to Richard Woodville. She was accused during her lifetime of using witchcraft.Elizabeth of York (1466 - 1503), eldest daughter of Elizabeth Woodville and Edward IV, became the queen consort of Henry VII and mother of Henry VIII, Mary Tudor and Margaret T udor.Catherine or Katherine Woodville(~1458 - 1497), sister of Elizabeth Woodville, who married advantageously thanks to her connection to her sister the Queen. She became the Duchess of Buckingham and the Duchess of Bedford.Mary Woodville (~1456 - 1481), another sister of Elizabeth Woodville, was able to marry the heir to the Earl of Pembroke through her sisters connections. Her father-in-law was executed by Warwick, the Kingmaker.Cecily of York (1469 - 1507) was the second surviving daughter of Edward IV and Elizabeth Woodville. (An older sister, Mary of York, died in 1482, before she could be married.) Edward tried to marry her to the Scottish royal heir, then to that heirs brother, but Edward died before that could be complete. Then Cecilys marriages were arranged -- and unarranged -- by the next two kings, Richard III (her uncle) and Henry VII (her brother-in-law). The Kingmaker and His Family Richard Neville, 16th Earl of Warwick, (1428 - 1471) was a powerful figure in the drama of the Wars of the Roses. He used his female family connections to advantage, including gaining the Warwick title itself through his wifes inheritance. He was called the Kingmaker, as his presence -- and that of the troops he could muster -- would make a difference in which king won. Lady Anne Beauchamp (1426 - 1492), Countess of Warwick, wife of the Kingmaker, mother of Anne Neville and Isabella Neville. She was an heiress, inheriting the Warwick titles because no male heirs remained, and bringing them to her husband. She was descended on the maternal side from King Edward III and the powerful Despenser family.Cecily Neville (1415 - 1495), was the aunt of the Kingmaker. She was the mother of Edward IV as well as of George, Duke of Clarence, and Richard, Duke of Gloucester, was married to Richard, Duke of York, who was the heir of Henry VI and his protector during his minority and during one or more bouts of insanity. Both Cecily and her husband were descendants of King Edward III of England and his wife, Philippa of Hainault. Cecilys mother was a daughter of John of Gaunt and Katherine Swynford.Anne Neville (1456 - 1485), daughter of Richard, Duke of York, called the Kingmaker, who was a nephew of Cecily Neville. She first married Edward of York, son of Henry V I of England, but after his early death, married Richard, Duke of Gloucester, the future Richard III, brother of Edward IV (and son of Cecily Neville). Richard and Anne were first cousins once removed.Isabella Neville (1451 - 1476), sister of Anne Neville, and thus daughter of the Kingmaker and great niece of Cecily Neville. She was also known as Isabel. She married George, Duke of Clarence, a younger brother of Edward IV (and older brother of Richard III, Anne Nevilles second husband), and also a son of Cecily Neville. Isabella and George were first cousins once removed. From the House of Lancaster Margaret of Anjou (1429 - 1482), was the queen consort of the Lancastrian king, Henry VI of England, with whom Edward IV contended in the Wars of the Roses. Margaret of Anjou was herself an active Lancastrian leader. Elizabeth Woodville had been a maid of honor serving Margaret of Anjou when she married Sir John Grey.Margaret Beaufort (1443 - 1509) was the Red Queen to Elizabeth Woodvilles White Queen. She was married to Edmund Tudor when she was only 12, and gave birth to his child after he died in Yorkist captivity. That child later became Henry VII. Though she married twice more, she never had more children, and threw her support to her sons cause in the Wars of the Roses. More? These women arent likely to be in the series, except by reference, but are important to the context of the story. Catherine of Valois (1401 - 1437), sister-in-law of Jacquetta, was the queen consort of Henry V of England and mother of Lancaster king Henry VI. She was also the grandmother of Henry VII, the first Tudor king, via her second husband, Owen Tudor. This is the same Henry VII who married Elizabeth Woodvilles daughter, Elizabeth of York. Catherines father was Charles VI of France. She is not likely to make an appearance in The White Queen: she died the year that Elizabeth Woodville was born.Margaret of Burgundy, a sister of Edward IV who was friendly with Edwards new wife Elizabeth Woodville. Margaret was married off to the Duke of Burgundy a few years after Edward became king, and after the Tudor triumph, her home became a haven for Yorkists in exile.Lady Jane Grey was descended from one of Elizabeth Woodvilles sons by her first husband, John Grey, and from one of Elizabeth Woodvilles daughters, Elizabeth of York, by her second husband Edward IV, through Elizabeth of Yorks and Henry VII s daughter Mary Tudor.Margaret Pole (1473 - 1541) was the daughter of Isabella Neville and George, Duke of Clarence. She was a peeress in her own right, and eventually earned the enmity of Tudor King Henry VIII. The Roman Catholic Church beatified her as a martyr in 1886.Elizabeth Tilney (1447 - 1497) was a lady-in-waiting to Elizabeth Woodville. Whether shell appear in the series I doubt, but it would be a subtle foreshadowing of the Tudor era: she was grandmother to both Anne Boleyn and Catherine Howard, second and fifth wives of Henry VIII. One way women often got entangled into the Wars of the Roses: illegitimacy controversies. Learn more about some of those: Birther Controversies and the Wars of the Roses Many of these same women were portrayed in Shakespeares Richard III as well.