Special Operations divers like Navy SEALs take on life-threatening risks such as enemy combatants and harsh environments. But another hazard is silent and unseen -- oxygen toxicity, the result of ...

In this stanza, Darwin links oxygen to warmth and heat–an apt metaphor, since without either life ceases to function. However, we now know that life exists in a relatively narrow range of temperature ...

Most people who try to hitch a free flight hiding in a jet’s wheel-well die in the attempt, like the person whose body was discovered on Christmas Eve after a flight from Chicago landed on Maui. But ...