Vertebrates have extremely different brain sizes: even with the same body size, brain size can vary a hundredfold. As a rule, ...
Summary: A global study of vertebrates reveals that body temperature is the key driver behind brain size evolution. Warm-blooded species like mammals and birds can maintain the energy demands of ...
Feeling persistently cold, especially in your hands and feet, can be a sign of iron-deficiency anemia—a condition in which the body doesn’t have enough iron to produce hemoglobin, which limits oxygen ...
It's normal for cortisol levels to rise and fall throughout the day in line with the body's circadian rhythm. People may also ...
Here, cardiologists explain the impact that staying hydrated can have on your cardiovascular health, including if (and how) ...
Technology might help you sleep better, or go haywire.
The disruption of sleeping and waking patterns from the daylight saving clock change reveals a great deal about our everyday ...
The ability to sense heat protects the body from burns and injury. But how the body actually feels temperature has remained ...
Through this research, the authors were able to recommend how frequently farmworkers should take rest breaks to protect ...
The ability to sense heat protects the body from burns and injury. But how the body actually feels temperature has remained ...
One study found that agricultural workers had more than 35 times the risk of heat-related deaths than other workers. But ...
Whether stemming from a wound, a toothache or an infection like the flu, nearly everyone has experienced the discomfort of having a fever. While fevers can be inconvenient and are sometimes a sign of ...
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