They are not mirror images. Uncover the profound differences between the North and South Poles, comparing their geology, extreme climates, and unique political status.
Can sharks hear your heart? We debunk the popular myth and explain the powerful, integrated sensory systems sharks use to detect prey, from vibration to electricity.
Quantify Pilates calorie burn rates (Mat vs. Reformer) and analyze the individual factors and fitness context that determine your real energy expenditure.