... landing is rather invalid. Nonetheless, academic scholars like Johan Reinhard agree that these Nazca Lines were designed by the Nazca natives when the light, top layer of gravel is moved to expose the darker layer of the soil. This creates a contrasting color distinction on the surface of the earth. Because the environment of Peruvian plateaus is extremely dry without any wind and rain, these geoglyphs are well-preserved and can be simply ... are interpreted as being a source of water. Present-day ceremonial offerings are recorded by Gary Urton, which displays the ritualistic lifestyle ...

• Word Count: 1683
• Approx Pages: 7
• Has Bibliography
• Grade Level: Undergraduate

... fact that eruptions pour out carbon dioxide, nitrogen, and other gases. Meteorites carry water, in the form of ice, and carbon containing compounds. The combination of volcanic activity and a constant shower of meteorites released the gases that created the Earth's atmosphere. Geologists believe that the earth's early atmosphere contained water vapor, carbon monoxide, carbon dioxide, hydrogen, and nitrogen. It also may have ... of height, weight, color, claw size, tail length, and other characteristics among members of the same species. He also observed that high birthrates and a shortage...

• Word Count: 2843
• Approx Pages: 11
• Has Bibliography
• Grade Level: Undergraduate