More than half a century ago, British-American physicist Freeman Dyson proposed the theory of what would come to be called a "Dyson sphere" or "Dyson swarm." In a nutshell, the Dyson sphere is "a system of structures orbiting [a] star, designed to intercept and collect its energy."
Sasha DiGiulian, 33, is now the first woman to free-climb what's known as the "Platinum Wall," the longest route straight to the 3,000-foot peak of Yosemite's El Capitan. She did i...
Classical charter schools have been rising in popularity across the country. They are funded by taxpayers and often tout a more traditional curriculum than regular public schools, but a CBS News inves...