The study revealed strong connections between the afternoon shut-eye sessions and positive outcomes in a handful of areas in the overall development of kids.
People with a DNA mutation that reduces their chance of HIV infection may die sooner, according to a study that suggests tinkering with a gene to try to fix one problem may cause others.
Newer drugs are substantially improving the chances of survival for some people with hard-to-treat forms of lung, breast and prostate cancer, doctors reported at the world's largest cancer conference.