Men's and women's brains react differently when helping others, study says
By Susan Scutti, CNN
Updated 1612 GMT (0012 HKT) October 9, 2017
Photos:Photos: Brain facts
How to keep your brain healthy – Scientists have learned more about the brain in the past 10 years than in all other time periods combined. Take a look at these discoveries to see how to improve your memory and boost your mental power.