credit: CDC / Amanda Mills First Aid Dr. Tyson Pillow explains the key first-aid skills kids of all ages should know before heading back to school. Shared Ancestor Rare whole genome duplication during spider evolution could reveal more about animal diversification. Signs your child may need glasses Dr. Christina Weng says noticing signs of vision loss is important in young children to prevent permanent damage. Eye Fatigue On The Road Dr. Zaina Al-Mohtaseb offers tips to prevent eye fatigue during road trips. Preventing Summer Brain Drain Dr. James Bray shares tips on how to prevent summer brain drain across different age groups.