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Graduation season is well underway, with kindergartners, high schoolers, college seniors and graduate students alike donning caps and gowns to celebrate their achievement. With their diplomas, graduates also get words of wisdom from a commencement speakers and a good excuse to celebrate. -- Lloyd Young ( 31 photos total)
US Naval Academy graduates throw their hats at the conclusion of their commencement and commission ceremony, attended by President Barack Obama at the Navy-Marine Corps Memorial Stadium on May 24 in Annapolis, Md. (Michael Reynolds/European Pressphoto Agency)     

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After cutting a destructive path through the Caribbean, Hurricane Sandy caused extensive damage along the East Coast this week. Sandy made landfall in southern New Jersey and brought with it major flooding, travel disruption, structural damage, and power outages. New York City was especially hard hit. The storm system was so large ­-- nearly 1,000 miles wide at times -- it brought blizzard conditions to West Virginia and 20 foot waves to Lake Michigan. It is projected Sandy will have caused about $30 billion in damages in the United States. To date, the storm claimed more than 100 lives. -- Lloyd Young ( 57 photos total)
Flooded homes in Tuckerton, N.J., on Oct. 30 after Hurricane Sandy made landfall on the southern New Jersey coastline on Oct. 29. (US Coast Guard via AFP/Getty Images)

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Yesterday was the Summer Solstice in the Northern Hemisphere, the day of the year when the sun was at its highest point in the sky. People around the world are welcoming the start of the new season by enjoying (or avoiding) the hot weather. In southern England, where yesterday brought heavy rains, pagans gathered at Stonehenge and reveled in spite of the downpour. Collected here are a handful of images of the beginning of Summer, 2012. [31 photos]

A Bengal tiger, sprayed with water by a zookeeper on a hot summer day at the Birsa Munda Zoological Park in Ranchi, India, on May 30, 2012. Zoo authorities are helping the animals cope with temperatures in excess of 40 degrees Celsius (104F) by providing coolers, special roofs and regular hose-downs. (STR/AFP/Getty Images)

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With well over a year before American forces pull out of Afghanistan, the conflict there drags on. Every month in The Big Picture, we feature a selection of recent images of events there, from the soldiers and insurgents at war, the people longing for peace, and daily life and culture in the country of 29 million. Afghanistan remains among the world's poorest nations, and struggles with issues not found in other places, like an ongoing fight against polio. Afghanistan still supplies about 90% of the world's opium, a major cash crop in a country with few viable exports. Gathered here are images from April, 2012. -- Lane Turner (33 photos total)
Afghan policemen are mirrored in glass from a broken window as they stand guard outside the building where Taliban fighters launched an attack in Kabul on April 16, 2012. A total of 36 Taliban militants were killed as they mounted a wave of attacks across Afghanistan. (Johannes Eisele/AFP/Getty Images)

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The Second Copernican Revolution: Our Changing View of Our Place in the Universe

Abstract: Five hundred years ago, Copernicus advanced the theory that the Earth was not the center of the Solar System. That theory revolutionized our understanding of the Universe. It was initially met with great opposition because of what it meant about our own significance. Today there is a second Copernican revolution underway that will once again alter our significance. Advances in technologies and techniques are enabling the detection, observation and study of Earth-like planets around other stars. And several deep-space missions are currently exploring potentially-habitable worlds within our Solar System as possible abodes for life beyond the Earth. As one such mission, the two intrepid robotic explorers, Spirit and Opportunity, have been exploring the surface of Mars for evidence of past habitable environments that could have supported life. The rovers have traversed great plains, climbed mountains, descended into deep craters and survived rover-killing dust storms and frigid winters. Both rovers have found clues that Mars was once Earth-like with a potential for life. Soon they will be joined by another larger, more capable rover on the surface. Within the next few years, we may be poised to answering that central question, "Are we alone in the Universe?" Speaker Info: John L. Callas, of NASA's Jet Propulsion Laboratory, Pasadena, Calif., has been project manager of NASA's Mars Exploration Rover project since March 2006. Previously, as science manager and then <b>...</b>
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Zothecula writes "While it's generally accepted that memories are stored somewhere, somehow in our brains, the exact process has never been entirely understood. Strengthened synaptic connections between neurons definitely have something to do with it, although the synaptic membranes involved are constantly degrading and being replaced – this seems to be somewhat at odds with the fact that some memories can last for a person's lifetime. Now, a team of scientists believe that they may have figured out what's going on. Their findings could have huge implications for the treatment of diseases such as Alzheimer's."


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