Genetic signatures of domestication identified in pigs and chickens

Wild boars and red junglefowl gave rise to common pigs and chickens. These animals' genes evolved to express themselves differently, leading to signatures of domestication—such as weaker bones and better viral resistance—in ...

Team discovers a new defense mechanism in bacteria

When confronted with an antibiotic, toxic substance, or other source of considerable stress, bacteria are able to activate a defense mechanism using cell-to-cell communication to "warn" unaffected bacteria, which can then ...

Study links nanoparticles to oxidative stress and neuron death

Researchers at the University of Kentucky have a better understanding of the regulation of extracellular vesicles by oxidative stress and how these vesicles spread oxidative stress and may damage neurons. Extracellular vesicles ...

Heat claims 175,000 lives a year in Europe: WHO

Heat kills over 175,000 people a year in Europe, where temperatures are rising quicker than the rest of the globe, the World Health Organization's (WHO) European branch said Thursday.

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Stress (biological)

Stress is a biological term which refers to the consequences of the failure of a human or animal to respond appropriately to emotional or physical threats to the organism, whether actual or imagined. It includes a state of alarm and adrenaline production, short-term resistance as a coping mechanism, and exhaustion. Common stress symptoms include irritability, muscular tension, inability to concentrate and a variety of physical reactions, such as headaches and elevated heart rate.

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