Science Today, Episode 20

A new study shows that even modest amounts of physical activity can benefit us greatly...it doesn't always take hours in the gym! Also, this month, Dr. Rich Kopecky brings us articles from worldwide science journals about a new therapy for sickle cell disease, the latest on the scientific debate between gravity and quantum physics, a new approach to treating traumatic brain injury, and where on Earth scientists are finding remnants of what they believe was the celestial collision that formed the Moon.