LUMOSITY: $31.5 million in Series D round to SF-based Lumosity, led by Discovery Communications, with existing investors Menlo Ventures, FirstMark Capital, Harrison Metal and Norwest Venture Partners participating. The company has raised over $70 million in funding. Lumosity offers over 40 brain-exercise games, developed with the help of neuroscientists at leading institutions like UCSF and Stanford. More details at VentureBeat.