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All About Supercontinents

The concept of a supercontinent is irresistible: what happens when the world's drifting continents clump together in one big lump, surrounded by a single world ocean? Alfred Wegener, starting in 1912, was the first scientist to discuss supercontinents seriously, as part of his theory of continental motion.
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Geography of Paraguay

Paraguay is a large landlocked country located on the Rio Paraguay in South America. It is bordered to the south and southwest by Argentina, to the east and northeast by Brazil, and to the northwest by Bolivia. Paraguay is also located in the center of South America and as such, it is sometimes called the "Corazon de America," or Heart of America.
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What Is a Commodity in Economics?

In economics, a commodity is defined as a tangible good that can be bought and sold or exchanged for products of similar value. Natural resources such as oil as well as basic foods like corn are two common types of commodities. Like other classes of assets such as stocks, commodities have value and can be traded on open markets.
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Common Hull Shapes on Boats and Ships

Naval architects have designed some crazy looking boats and they will continue to push forward with topside design principals. The hull, on the other hand, is well refined and needs a little tinkering. Hydrodynamics research is driven by supercomputers in the modern world, but the old refined designs originally built by eye and scale models are proving to be very efficient without the help of computer chips.
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Are Coursera's Online Specialization Certificates Worth the Cost?

Coursera is now offering online “specializations” - certificates from participating colleges that students can use to demonstrate completion of a series of classes. Coursera is known for offering hundreds of online free-to-the-public courses from colleges and organizations. Now, students can enroll in a pre-determined series of courses, pay a tuition fee, and earn a specialization certificate.
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