It's probably an empty promise, according to the largest study to date of brain - training software, which finds no evidence of general cognitive benefits. (sciencemag.org)
In the most detailed large - scale study to date of the proteins that package DNA, researchers have mapped a family of switches that turn genes on and off. (hhmi.org)
The research is the largest study to date on breast - feeding and its effect on adult obesity. (articles.chicagotribune.com)