In this hour of To the Best of Our Knowledge, Simon Winchester tells the remarkable story of Krakatoa. The volcanic eruption spewed chunks of land 25 miles into the air. The blast was heard three thousand miles away. And it kicked up monstrous tidal waves that killed nearly forty thousand...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...