Futrism (Nov. 18) -- A host of mental health issues have been tied to light: From trouble related to our circadian rhythms to seasonally related mood disorders, light can have a profound impact on our health. In a new study at Illinois, researchers led by Stephen Boppart, a professor of bioengineering and electrical and computer engineering, have put this long-held theory to the test using ultrafast light pulses that can trigger mouse neurons to fire, as well as altering the patterns in which they fire. Also: Photonics Online (Nov. 20)