Are online prescription services for birth control safe and efficient? A secret-shopper study has the verdict.

Microbiologist Darren Higgins talks about infectious disease research and his fascination with microbes.

Did the human heart evolve for endurance or bursts of activity? The answer could help us understand the impact of our sedentary lives.

Delirium affects half of all hospitalized seniors. Although most people recover fully, for others the complications can be long-lasting.