The Incredible Human Journey Paleontologists believe the entire human race descends from Africa. The earliest human remains were discovered there‚ this is why scientists believe “we are all children of Africa.” Archeologists discovered a human skull that is dated 195 thousand years old. No other remains remotely close to this age have been discovered anywhere else on the planet. Evidence suggests that the first human like species evolved around 400 million years ago from apes eventually evolving
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Abstract Isopentyl acetate was synthesized in 44.9% yield through a reaction between isopentyl alcohol and acetic acid‚ with sulfuric acid as a catalyst. Identify and purity of the product was confirmed by infrared spectrum analysis of the product and the boiling point (141-142˚C) to the published value of (lit1142.5 ˚C). Procedure: Isopentyl alcohol (.893g)‚ acetic acid (2ml)‚ and concentrated sulfuric acid (4 drops) was added to a 5ml conical vial‚ and then attached to a reflux apparatus.
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The Saga of :-) One colon‚ one hyphen and one parenthesis——by pressing these three keys on his keyboard‚ the computer scientist Scott E. Fahlman made the first sideway smiling face in human history‚ dubbed “emoticon”. Nowadays‚ six billion of them flooding the Internet on a daily basis‚ along with their slicker younger sisters‚ emojis. While demonstrating a rampant and iridescent interplay of symbols‚ images‚ and the complexity of human language‚ these burgeoning modern “hieroglyphics” are bringing
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Should people be loyal? How loyal are you talking about? I think that both that people should be loyal to someone if someone else that is going to be loyal to them‚ but the loyalty of someone should not be over used. In source A their is an great example of a dog be loyal to his or her owner. In source B their is also a great example of loyalty to someone how is going to pay you back by being loyal back to you. In source C their is an example of loyalty being over used as to one side of someone.
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Great literature has always run into great controversy‚ such as classics like The Catcher and the Rye by J.D. Salinger‚ The Grapes of Wrath by John Steinbeck‚ and of course The Adventures of Huckleberry Finn by Mark Twain. The Adventures of Huckleberry Finn is of the antics of a 13-year-old Huck‚ and adult runaway slave. This piece of writing is found to be a classic and a standard for American literature; although recent debate on Twain’s racist language and stereotypical view on African Americans
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Drilling in ANWR The issue of where to get America’s oil from has been an outstanding issue ever since oil was first founded. The major problem is where we get it from: other countries‚ where they are getting billions of dollars yearly but yet we are still preserving our own reserves‚ or our own country‚ where we can save money and create jobs in areas such as Alaska‚ that are rich in oil reserves. Drilling for oil in Alaska‚ especially in the ANWR (Arctic National Wildlife Refuge) region‚ has been
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Ultraviolet rays most skin cancers are caused by too much exposure to the sun’s ultraviolet (UV) rays. The two types of UV rays that cause melanoma are UV-A and UV-B rays. UV-A rays Are fairly constant throughout the year‚ and contribute to aging and wrinkling of the skin. UV-B Rays‚ stronger than UV-A rays‚ are more intense in the summer months and are the most common cause of sunburn. The longer you are out in the sun‚ the more UV radiation you receive. A blistering sunburn at an early age can
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The repercussions and consequences that occurred at the end of both World Wars contributed to the dramatic shifts in nationalism and desire for independence during the nineteenth and mid-twentieth centuries. Many countries emerged out the fallen empires‚ empires such as the Weimar Republic and the Ottoman Empire. The desire for independence and the growth of individual and communal nationalism heavily impacted the worldview of ethnic and religious communities all over the world. Suddenly‚ collections
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Although the betterment of society through well-equipped‚ morally upstanding citizens is undoubtedly a necessity‚ this conventionality should not inhibit a student’s growth or limit their education to group-think standards. For example‚ upcoming seniors typically assume that they have free-reign to specialize their courses and focus on personal areas of interest as the majority of required courses are completed. However‚ according to several states’ boards of education‚ a math course should be taken
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Introduction The American Chemical Society databases were investigated through Scifinder Scholar Version X to find any information about Butyl 2-Cyano-(3‚5 dichloro-phenyl)-2-propenoate. There was no previous information present. Then‚ the microscale synthesis and characterization of Butyl 2-Cyano-(3‚5 dichloro-phenyl)-2-propenoate was conducted with the base catalyzed Knoevengael condensation of the butyl cyanoacetate and corresponding aldehyde (gkharas/235_14F/235_14F_Lab_2.pdf) and analysis. The elemental
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