Your body temperature might seem like just another vital sign, but it quietly reveals more than most people realize. From metabolism to mood, fluctuations in your temperature can serve as a hidden ...

When you’re feeling sick and wondering whether to go to work or school, the thermometer often has the final verdict. Most people have been taught a body temperature of 98.6 Fahrenheit is normal, while ...

That thermometer reading you barely glance at during a doctor’s visit? It might be hiding critical information about your health that goes far beyond checking for a fever. While we’ve long treated ...

Throughout history, people have had to find ways to cope with varying environmental conditions. Whether they lived in a hot or cold climate or had access to plentiful or limited water, they adapted ...

The moment you step into oppressive heat, the body senses life-threatening danger and starts fighting to keep things cool. The heart beats faster as it increases the flow of blood to the skin, trying ...

Vertebrates have extremely different brain sizes: even with the same body size, brain size can vary a hundredfold. As a rule, mammals and birds have the largest brains in relation to their body size, ...