Do you blush easily? We tend to blush when we’re embarrassed, ashamed or nervous. Why do our cheeks go red, and why can’t we control it? And does blushing serve a purpose?
Water: it covers 97% of the planet, makes up almost two-thirds of each of us, and is a requirement for life as we know it. But did you know too much of it can kill you?
You've suffered a gunshot wound. You're losing blood and your organs are failing fast. Would you let doctors drain your blood and chill your body to 10 ºC, entering a state of clinically-dead, suspended animation, to buy precious time that may save your life? This radical technique is being trailed by a group of doctors at the University of Pittsburgh Medical Center in Pennsylvania.