10 Awesome Online Classes You Can Take For Free Cool, but you need iTunes for nearly everything, and that gets an 'F.' Are there really no other places to get these lessons? I was sure there are some on Academic Earth. Flagged 1. 7 of them are available via YouTube. 2. iTunes is free. 1. 2. Don't worry, we're looking out for you! While I have no personal beef with iTunes, I know that many people share your sentiments — so I actually made a concerted effort to include relevant youtube links when possible.
The statues of Easter Island could have "walked" into place There've been various mechanisms proposed for moving the moai. Another suggested technique involved sliding them on a layer of small round rocks, and then raising them upright by piling small rocks underneath them, lifting them a little, piling more rocks under them, and so on. This always seemed plausible to me as - having hiked across Easter Island - I can confirm that the island has an abundant supply of small round rocks. I'm not sure that all the moai have the long-bodied form. It's quite possible that there were not only different designs, but different techniques for moving them. Incidentally, many of them also had stylish red 'hats' made out of a different stone.
Amazingly Creative Drawing Vs Photography This wonderful work has done by a very talented Belgian painter, illustrator, portraitist, caricaturist and photographer Ben Heine. This creative artist was born in Abidjan, Ivory Coast. He Studied graphic arts and sculpture and I also have a degree in journalism. Lets take a look at some of his awesome works that he calls “Drawing Vs Photography” or “Imagination Vs Reality”. Self Sufficient Living Humans Change the World Modern humans evolve in Africa. Image courtesy of Karen Carr Studio.For millions of years all humans, early and modern alike, had to find their own food. They spent a large part of each day gathering plants and hunting or scavenging animals. Then, within just the past 12,000 years, our species, Homo sapiens, made the transition to producing food and changing our surroundings. 200,000 Years Ago Modern Humans Evolve in Africa During a time of dramatic climate change, modern humans (Homo sapiens) evolved in Africa. The first modern humans shared the planet with at least three species of early humans. Modern humans exchange resources over long distances. By 164,000 years ago Modern humans collect and cook shellfish By 130,000 years ago Modern humans exchange resources over long distances By 90,000 years ago Modern humans make special tools for fishing Between 80,000 and 60,000 years ago Modern humans spread to Asia By 77,000 years ago Modern humans almost become extinct. About 74,000 years ago Costs
Khan Academy From kindergarten to calculus, Khan Academy is here to help. Sharpen your skills with over 100,000 interactive exercises. Over 100,000 interactive exercises. You may have heard about our videos, but did you know that Khan Academy has fun interactive math exercises that cover skills ranging from counting to calculus, grade by grade? Every exercise has step-by-step hints, so your child can practice as much as needed. Created and peer-reviewed by a team of math educators, our exercises include full coverage of US Common Core and beyond, ranging from early math through calculus. Review student progress in real time. You will be empowered with instant, in-depth feedback and reports so you’ll know exactly where each student and your class as a whole stand at any time throughout the year. Stay up to date with your child’s progress. You’ll get quick email updates so you can see your children’s progress as they learn, both when they’ve mastered new skills and when they might be struggling.
Prediction #5: Plasma Formations in the Ancient Sky Plasma scientists are now comparing electrical discharge formations in the laboratory to rock art images around the world. Results in 2005 should confirm that immense and terrifying plasma configurations were seen in the sky of our ancestors. For over three decades Anthony Peratt, a leading authority on plasma phenomena, concentrated his laboratory research on the unstable formations that develop in high-energy electrical discharge. But Peratt’s most recent work has taken him in a new direction, and the results offer a remarkable link between plasma science and things once seen in the heavens. In his investigation of rock art themes, Peratt concentrated his field work in the American Southwest and Northwest, but he also gathered data internationally. The illustrations of one interesting formation—the “squatter man” shown above--are taken from Peratt's recent paper in "Transactions on Plasma Science" of the Institute of Electrical and Electronics Engineers, in December 2003.
Nature pictures, nature photos, wildlife nature photography 10 Ways Our Minds Warp Time How time perception is warped by life-threatening situations, eye movements, tiredness, hypnosis, age, the emotions and more… The mind does funny things to our experience of time. Just ask French cave expert Michel Siffre. In 1962 Siffre went to live in a cave that was completely isolated from mechanical clocks and natural light. He soon began to experience a huge change in his perception of time. When he tried to measure out two minutes by counting up to 120 at one-second intervals, it took him 5 minutes. But you don’t have to hide out in a cave for a couple of months to warp time, it happens to us all the time. 1. People often report that time seems to slow down in life-threatening situations, like skydiving. But are we really processing more information in these seconds when time seems to stretch? To test this, Stetson et al. (2007) had people staring at a special chronometer while free-falling 50 metres into a net. 2. 3. 4. 5. 6. 7. 8. 9. 10. Time is relative “Time is an illusion.
5 Nazi Plans That Prove They Were Dumber Than You Think Other websites like to tiptoe around the issue, but we've never hesitated to come out and just say it: The Nazis were bad. And the thing is, the Nazis weren't strictly about tearing Europe down brick by brick and the Holocaust. They actually had tons of other horrible and, quite frankly, stupid ideas. #5. Fun fact about Hitler: In the 1930s, he ordered Catholic schools to replace their classroom crucifixes with pictures of him. GettyOn one hand, militarism is terrifying. Step one in that plan: Seize the Vatican. The Stupidity: By 1943, Pope Pius XII began making vague yet public condemnations of Nazi human rights abuses, and Hitler started making vague threats of killing him for it. Getty"Once I have that hat, the armies of the Reich will be unstoppable!" OK, but that's just occupying the Vatican, kidnapping the Pope and stealing some art, right? Fortunately, the plot never took place because one of the inside men alerted the Italians before it ever got underway. #4. #3. And for what?
The Elements Revealed: An Interactive Periodic Table In the October 2011 issue of Scientific American, we celebrate the International Year of Chemistry. Learn more about its impact on our daily lives in our Special Report. UPDATED: 06/18/2013 In honor of the 2013 Lindau meeting, which focuses on chemistry, we have updated our interactive periodic table with links to Nature Chemistry's In Your Element essay series. Main Sources & More to Explore: The Poisoner’s Handbook: Murder and the Birth of Forensic Medicine in Jazz Age New York. Interactive by Krista Fuentes Davide Castelvecchi Davide Castelvecchi is a freelance science writer based in Rome and a contributing editor for Scientific American magazine.