Clear up the confusion: Thunder is sound. We explain the physics behind lightning, the sound wave it creates, and the delay between the flash and the boom.
Explore the essential science of murine lactation, from the unique anatomy and behavioral logistics of nursing large litters to the milk's specialized, high-calorie composition.
Healthy teeth are naturally slightly yellow because of dentin. Learn why this color is normal, what causes shade changes, and when discoloration signals a problem.