Time of year and weather conditions don't have much influence on depressive symptoms. Getting depressed when it's cold and dreary outside may not be as common as believed.

Though some Europeans were still hunter-gatherers in 4,600 BC, there was interaction between the hunter-gatherer and farming communities and a 'sharing' of animals and knowledge  which led to acquisition of domesticated pigs from nearby farmers, according to new evidence. 

A new study conducted by the National Renewable Energy Laboratory (NREL) found that it might be possible for solar and wind generation to be cost-competitive with conventional energy, without federal subsidies, by 2025 - if new renewable energy development is allowed in the most productive locations.

Girls are told they are supposed to experience math anxiety and so they claim to on surveys but they are not actually more anxious during math classes and exams, according to a new paper. 

Sociology surveys suggest that females are more anxious when it comes to mathematics than their male peers. But education researchers identified a critical limitation of previous papers examining math anxiety: They asked students to describe more generalized perceptions of mathematics anxiety, rather than assessing anxiety during actual math classes and exams.

An international team at the GSI research facility in Germany have confirmed the existence of a new element with atomic number 115, verifying earlier measurements performed by research groups in Russia.

Marijuana went from being a gateway drug or a dangerous hallucinogen (a la "Reefer Madness") to being a 'safe drug' more recently, which is just as inaccurate,  according to a new review.  

The researchers reviewed over 120 studies that looked at different aspects of the relationship between cannabis and the adolescent brain, including the biology of the brain, chemical reaction that occurs in the brain when the drug is used, the influence of genetics and environmental factors, in addition to studies into the "gateway drug" phenomenon. 

The nature of the teenage brain makes users of cannabis amongst this population particularly at risk of developing addictive behaviors and suffering other long-term negative effects, they note.