The principle of quantum coherence in pigment molecules involved in photosynthesis has been demonstrated by Gregory Engel in 2007, but only at a frigid -196 C. Just recently Gregory Scholes at the University of Toronto and his colleagues have demonstrated the same effect at room temperature. Physicists had believed that this quantum effect could not occur at such a temperature, but Engel and colleagues have reproduced the experiment with essentially the same results. An article in New Scientist has the links to the source articles.