A new analysis finds that youths who hold off on trying marijuana until age 17 do better on cognitive tests and drop out of school at a lower rate than those who start by age 14. Obviously negative health behavior in alcohol and cigarettes are linked in the same ways, but those two have not gotten the health halo that marijuana has gotten, thanks to politicians who have turned a blind eye to health concerns in the interest of generating more revenue.

In computer science, the classic Turing test evaluates a machine's ability to mimic human behavior, and therefore is a measure of determining how close a machine can come to artificial intelligence. To pass, a computer must fool the tester into thinking it is human -- typically through the use of questions and answers.

What about for single-celled organisms? They can't communicate with words but they still communicate, and that means the search is on to create artificial ones that do just. IN ACS Central Science, researchers demonstrate that certain artificial cells can pass a basic laboratory Turing test by 'talking' chemically with living bacterial cells.

America is a car culture. The saying goes, in Europe 100 miles is a long distance whereas in America 100 years is a long time.

With a heritage of continental exploration and frontier expansion, it is no surprise that Americans embraced the automobile in a way no one else did. It inhabits our movies, our music. Everyone except millennials has a road trip soundtrack. Life is a highway, Route 66, and more.

Expectant and new parents are under a great deal of pressure; every action is scrutinized by those around them, and food marketers and activist groups exploit their fear by telling them one food process will lead to higher grades in school while another food process will lead to obesity, cancer, endocrine disruption and anything else environmental fundraisers can dream up.

It takes no time to make such claims and exploit people for money but far longer to do studies to show if the claims are real. 

A chronic inflammatory process that may trigger cardiovascular problems could be solved by what's in a cup of coffee, according to a recent paper.

Using survey data, medical and family histories and blood samples of over 100 human participants in the Stanford-Ellison cohort, a long-term program begun 10 years to study the immunology of aging(1), has revealed a fundamental inflammatory mechanism associated with human aging and implicates this inflammatory process as a driver of cardiovascular disease and increased rates of mortality overall. Metabolites, or breakdown products, of nucleic acids — the molecules that serve as building blocks for our genes — circulating in the blood can trigger this inflammatory process, the study found.

In 2006, former U.S. Vice-President Al Gore predicted that we only had 10 years to stave off our carbon dioxide doom, with plummeting yields in Africa, the Himalayas melting and other doomsday scenarios happening by 2016.