Charles Darwin believed that all life forms have one common ancestor. Because of this belief, astronomers, from the University of Cambridge, have combined their knowledge with biology and archeology to apply this theory to stars in the Milky Way. The team picked 22 stars, including the sun to study. They studied the chemical substances within the stars to see if any were similar. Stars are born from explosions in the gas clouds, if two star have the same chemical compositions then they are most likely from the same gas cloud. Once the families were identified by using the information from their chemical DNA, their evolution was studied.
In evolution, organisms are linked together by patterns of descent. After their study, they came to the
Web. The Web. The Web. 11 February 2014 “Biology: Evolution”. The New York Public Library Science Desk Reference.
In the short story, “the Space Between the Stars”, by Geeta Kotari, it is evident that Maya, a woman from India that grew up in the U.S., longs to find self-worth, happiness and belonging, but struggles due to her traditions and culture. Throughout the story, Maya feels restricted by the ideas taught to her during her childhood. She wants these restrictions lifted. For example, Kotari states “[m]aya’s sole desire; to be like everyone else and not like her aunt, who still lived in the culture she’d left over 30 years ago” (104). This quote demonstrates Maya’s longing to belong in mainstream Americans society.
comes from and how they evolved in the manner that they did. This type of
The Hall of the Vertebrate Origins is another exhibit that shows evidence of evolutionism. The purpose of this hall is to show that all vertebrates had a common ancestor. That common ancestor had a brain case and a backbone. As time progressed, the vertebrates developed limbs that were supported by the backbone, and had watertight eggs.
...oling climate and slowly evolved into Homo erectus, and then Homo erectus was affected by sexual selection, the split of their population, and their new necessary diet. They, in turn, slowly evolved into modern Homo sapiens. Natural selection, sexual selection, and genetic drifts all affected these species, and what took them to evolve into us, modern humans.
The Orion Nebula contains one of the brightest star clusters in the night sky. With a magnitude of 4, this nebula is easily visible from the Northern Hemisphere during the winter months. It is surprising, therefore, that this region was not documented until 1610 by a French lawyer named Nicholas-Claude Fabri de Peiresc. On March 4, 1769, Charles Messier inducted the Orion Nebula, M42, into his list of stellar objects. Then, in 1771, Messier released his list of objects for its first publication in Memoires de l’Academie.1
Charles Darwin’s theory of natural selection explains the general laws by which any given species transforms into other varieties and species. Darwin extends the application of his theory to the entire hierarchy of classification and states that all forms of life have descended from one incredibly remote ancestor. The process of natural selection entails the divergence of character of specific varieties and the subsequent classification of once-related living forms as distinct entities on one or many levels of classification. The process occurs as a species varies slightly over the course of numerous generations. Through inheritance, natural selection preserves each variation that proves advantageous to that species in its present circumstances of living, which include its interaction with closely related species in the “struggle for existence” (Darwin 62).
I was born with an inherent fascination for all things celestial. Ever since I was young, I have been staring at the night sky trying to find constellations, or using my juvenile imagination to create my own. My efforts to find, view, and mentally catalogue everything the heavenly bodies have to offer has led me to employ some over-the-top measures, but the most extreme of them all might be the night I stayed awake through the wee hours of the morning to catch a glimpse of a meteor shower. Over the course of an entire year, the memory of this stupefying event is still as lucent and vivid as it was that very night so long ago.
There are many different theories about the creation of the world. The two that rival each other are the religious versions and the scientific version. The quote “They say that every atom in our bodies was once a part of a star”, by Carl Sagan an astronomer, supports the scientific theory, which is being accepted as true more and more each day. What the quote tells us is that Carl Sagan believed in the Big Bang theory and the theory of evolution.
Charles Darwin also showed how new species were created on the acts of evolution. It is easily explained by having big differences from the effect of natural selection, which were considered to be new species. So back in the beginning, before the effects of evolution had occurred there was just one specie, which evolved to make the species that we know today. So somehow all species are somewhat connected. The basis of what Darwin was proving was that life on Earth is simply the result of billions of years of adaptation to the changing environments. That is why certain species can only live in certain climates. This can be explained with the color of your skin, or the growing of plants.
...o happen. But with the help of fossil evidence we are able to identify common ancestors and evolutionary pathways between species. We also identify oxygen as a major key contribution for life to evolve. Also, through scientific research it has been established that arthropods and chordates have shared genes, leading to the path of vertebrates and human life.
...he process of evolution after a lot of stages of evolution and this might not even be the last stage. Past species have also left records of their history. Fossils along with comparative anatomy of present-day organisms contribute to morphological record. By comparing the anatomies of modern and extinct species paleontologists can tell the relationship between them.
The Andromeda Galaxy is the Milky Way Galaxy’s closest neighbor; with it being around 2.5 million lightyears away from Earth. It was once referred to as the Great Andromeda Nebula in older readings. It gets its name from the Andromeda constellation which in turn received its name from the Greek goddess Andromeda.
Phylogeny is an estimated representation of an organism’s or group of organisms’ evolutionary history. Scientist use a phylogenetic tree to visualize ancestor descent relationship through time. The closer together different taxa are represented in a phylogenetic tree the more closely related the species are to each other. Phylogenetic tree is consists of different types of characteristics which makes it easier for scientists to understand them. One of the characteristic is a branch, which represent the population of specie through the beginning of time. Another characteristic is a terminal node (or the tip of the branch), which represent the most recent species. The last characteristic is a node which is where 2 branches diverged, this represents speciation where the ancestral species split from one specie to two. Speciation is when one organism or one population diverging and can’t interbreed any more. Phylogenetic and phylogenetic trees require speciation to have occurred.
The Universe is a collection of millions of galaxies and extends beyond human imagination. After the big bang, the universe was found to be composed of radiation and subatomic particles. Information following big bang is arguable on how galaxies formed, that is whether small particles merged to form clusters and eventually galaxies or whether the universe systematized as immense clumps of matter that later fragmented into galaxies (Nasa World book, 2013). A galaxy is a massive area of empty space full of dust, gases (mainly 75% Hydrogen and 25%Helium), atoms, about 100-200 billion stars, interstellar clouds and planets, attracted to the center by gravitational force of attraction. Based on recent research, 170 billion galaxies have been estimated to exist, with only tens of thousands been discovered (Deutsch, 2011).