The Source of Earth's Oceans

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Science vs. religion has always been a controversial topic. Religion are what some people choose to believe in, while others choose to listen to scientific evidence and theories. This article explains the scientific ideas of one controversy that has been studied for years, the source of Earth's oceans.

Previously, isotopic dating and comparison of radioactive decay in natural elements showed that asteroids contained similar water than that found on Earth. Comets were only thought to contribute about 10 percent of water on Earth. However, this information was determined by studying and testing 6 different comets, prior to new findings. In November of 2010, a new comet was found and researched, the Comet Hartley 2. Using the same isotope comparison methods, along with other tests, researchers have now determined that its water is very similar to Earth's.

earth2.jpg

This finding demonstrates more than one psychological idea that we have talked about. The first is ruling out rival hypothesis. Previous ideas and evidence provided different ideas about Earth's water source. These hypotheses were ruled out by the more likely and more supported ideas of asteroid and comet contributions. Now, because of new evidence, the previous idea that asteroids were the largest contributor to Earth's oceans is being challenged.

The second psychology idea that relates to this article is that extraordinary claims need extraordinary evidence. If scientists are making this claim going against previous evidence, they need an immense amount of research to back it up. Although this idea is very possible, no substantial evidence has been found/proven yet. Extraordinary evidence will be needed for this claim to be accepted and for it to be worth repeating by others.


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This page contains a single entry by haral026 published on October 9, 2011 10:16 PM.

Where Am I? was the previous entry in this blog.

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