SciAm news-090504

• Brain Trainers: A Workout for the Mind

• A Sex Chip? Targeting the Brain's Pleasure Center with Electrodes

• Illusions in Motion: The Power of Symmetry

• On "pot smokers' day," a study showing your brain makes something like marijuana

• How to Live with Ecological Intelligence

• Why Dating Doesn't Predict Marital Success

• Are Very Young Children Stuck in the Perpetual Present?

• What If Vitamin D Deficiency Is a Cause of Autism?

• MIND Reviews: Out of Our Heads, by Alva Noë

• How Room Designs Affect Your Work and Mood

• Ear Cells Actively Amplify Sound