Testosterone – the hormone of aggression?
Testosterone deserves a special approach. Studies on the impact of this hormone on the aggressive behavior are being carried out for centuries. It is well known that, in animal world, for example in birds, the individuals who have a higher level of testosterone behave more aggressively and they can even attack their brothers; they are more combative, more sexually active and bolder in claiming or searching for food [Müller et al., 2014].
See more: http://socialethology.com/testosterone-the-hormone-of-aggression
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