Smiling Triggers Happiness: "Smiling, even in a bad mood, will immediately improve your mood. Using these muscles is enough to trigger happy chemicals in the brain." – life hacks #320 via 1000 Life Hacks
Trigger-Happy Star Formation (NASA, Chandra, 8/12/09). his composite image, combining data from the Chandra X-ray Observatory and the Spitzer Space Telescope shows the molecular cloud Cepheus B, located in our Galaxy about 2,400 light years from the Earth. A molecular cloud is a region containing cool interstellar gas and dust left over from the formation of the galaxy and mostly contains molecular hydrogen.