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A 6,000 year old telescope without a lens - prehistoric tombs enhanced astron... Astronomers are exploring what might be described as the first astronomical observing tool, potentially used by prehistoric humans 6,000 years ago. They suggest that the long, narrow entrance passages to ancient stone, or 'megalithic', tombs may have enhanced what early human cultures could see in the night sky, an effect that could have been interpreted as the ancestors granting special power to the initiated. The team present their study at the National Astronomy Meeting, being held this week in Nottingham. The team's idea is to investigate how a simple aperture, for example an opening or doorway, affects the observation of slightly fainter stars. They focus this study on passage graves, which are a type of megalithic tomb composed of a chamber of large interlocking stones and a long narrow entrance.

Free Physics Video and Audio Courses These are the free physics video and audio courses. They are ordered based on their difficulty, starting with easiest first and ending with the most difficult. Also if you love physics, check out my friend's video websites dedicated to three famous physicists: How Things Work Posted by admin on Dec 28, 2012 in Entertainment | 27 comments For many thing that we all day see in our lives, we don’t know how some of that things work. Here you can see how things really work. How a Zipper Works Illustrating Pi: Unrolling a Circle’s Circumference

Aboriginal astronomers: world's oldest? THERE’S GROWING EVIDENCE THAT Australia’s indigenous people could be the world’s oldest astronomers, according to astrophysicist Ray Norris, who is based at CSIRO's Australia Telescope National Facility in Sydney. He has researched Aboriginal stories about the night sky for five years and says one of the earliest European records of indigenous astronomy was made by William Stanbridge, an Englishman who emigrated to Australia in 1841 and ran sheep at Lake Tyrrell, in northern Victoria. Stanbridge befriended members of the local Boorong people. They showed him how they viewed the constellations and Stanbridge published their stories in his 1857 essay On the Astronomy and Mythology of the Aborigines of Victoria. Stanbridge’s writings recorded the Boorong’s holistic use of astronomy and explained how they integrated their understanding of the stars with knowledge of the land and seasons, Ray says. Perspectives of the southern cross

This Woman Has Spent The Last 14 Years Photographing The World's Oldest Trees San Francisco-based photographer Beth Moon has spent the last 14 years in search of the world’s oldest trees. In the most remote and obscure locations she has uncovered the most spectacular trees, many of which appear old enough to hold long buried secrets of the world. In her artist statement Beth writes, “Standing as the earth’s largest and oldest living monuments, I believe these symbolic trees will take on a greater significance, especially at a time when our focus is directed at finding better ways to live with the environment.” Take a peak at some of the most amazing and oldest trees Beth encountered throughout her 14-year journey.

Some Satellite Photos of Earth at Night (After clicking on a photo-link to show a photo, click on the Back button of your browser to return to this page. Alternatively: In most browsers, you can click the right mouse button when the cursor is over a link, then choose to open the link in a separate window.) Table of Contents: (of this page) For more images, you can use an Image search engine, like Google Images, and use keywords like "lights night satellite". End of Table of Contents. Maxwell's equations: meaning, derivation and applicability - Classical Physics Quote So if Coulombs law works best for you, then use coulomb's law - there's no need to re-invent the wheel. As far as the original problem goes it is solved, but it uncovered great many things for me, so what is left now is curiosity because this solution implies Coulomb's and Biot-Savart law tell different and more complete story than Maxwell's equations and yet they are supposed to talk about the same E and B fields.

Important Infrequently Used Words To Know Paul V. Hartman (The Capitalized syllable gets the emphasis) alacrity a-LACK-ra-tee cheerful willingness and promptnessanathema a-NATH-a-ma a thing or person cursed, banned, or reviledanodyne AN-a-dine not likely to cause offence or disagreement and somewhat dull//anything that sooths or comfortsaphorism AFF-oar-ism a short, witty saying or concise principleapostate ah-POSS-tate (also: apostasy) person who has left the fold or deserted the faith.arrogate ARROW-gate to make an unreasonable claimatavistic at-a-VIS-tic reverting to a primitive typeavuncular a-VUNC-you-lar “like an uncle”; benevolent bathos BATH-ose an anticlimaxbereft ba-REFT to be deprived of something valuable “He was bereft of reason.”

Dreaming of the sky Just as ecologists are increasing their understanding of the Australian environment through studying Aboriginal stories and talking to tribal Elders, so astronomers are beginning to appreciate Indigenous knowledge of the sky. When Macquarie University PhD student Duane Hamacher encountered Aboriginal Dreamtime myths involving fiery stars falling to Earth, he decided to see if he could track where these objects had landed. Following several leads, Duane surveyed remote areas of Australia using Google Earth—and discovered a meteor impact site at Palm Valley, about 130 kilometres southwest of Alice Springs. What Duane and colleagues from Macquarie’s Department of Earth and Planetary Science found when they visited Palm Valley was a bowl-shaped geological structure that could not have been formed either by erosion or volcanic activity.