Jennifer Aniston's fifteen year old dog Norman has reportedly been diagnosed with depression. Jen took him to a specialist canine therapist after the dog disappeared for a night and started acting unusually upon his return.

Researchers at Yale University say they have identified a gene as a possible cause for depression. The discovery could yield a new version of antidepressants that could target the specific gene known as MKP-1.The study conducted genome scans on tissue samples from 21 dead people who had depression and compared those to tissues samples from healthy people. The MKP-1 gene was more than twice as strong in those who had depression. The researchers then transferred the genes to mice and found the mice displayed depressive behavior associated with too much stress.

According to the study, the MKP-1 gene shuts down a pathway in the brain that causes neurons to not function properly. Previous studies had shown a similar breakdown of the pathways.