When scientists first sequenced the human genome in 2003, they revealed the full set of DNA instructions that make a person. But we still didn’t know what all those 3 billion genetic letters actually do. —Antonio RegaladoIt’s officially summer, and the grid is stressedIt’s crunch time for the grid this week. These are the moments we design the grid for: when need is at its very highest. But demand for electricity from major grids is already peaking, and that's a good reason to be a little nervous.