Was Henry David Thoreau a failure? Hardly. Today, he's considered one of America's great writers. But his mentor, Ralph Waldo Emerson, called him the worst kind of failure: a dreamer. At Thoreau's funeral, Emerson said Thoreau was born for greatness, but he lacked ambition. He was nor more than...Read more


Scientists are launching one of the most audacious projects ever conceived: a detailed map of the human brain, neuron by neron, synapse by synapse. For some scientists...