Evolutionary theory holds that life evolves from the simple to the complex. Over the course of eons, new life forms weave in and, more often than not, out of existence. Composer Fung Lam knew this when he wrote his new piece for orchestra, "Endless Forms." The title is a quote from Charles Darwin. Lam creates a number of musical ideas, some of which don't survive. Others, he says, "blossom into very different and contrasting creatures." We'll hear the world premiere, from a concert last month in London.