Fighting On The Rise

I recently found an article in which reserachers have found the aggression center that is found within the hypothalamus of the brain. It mentioned that when this region was triggered by electrical stimulation, mice became more aggressive and would attack other mice, regardless if they were male or female. This makes me curious as to if the same reaction would occur in humans. It seems as though there has been a significant increase in the number of scuffles and full-blown fights in our building within the last few weeks. Most of these incidents have occurred between young ladies. I'm wondering if anyone else has seen an increase in these behaviors or if it is just something that is happening here. I have some curiosity as to whether or not it is seasonally related or just girls being girls. There is nothing else like high school drama!