Over time, the cells may stop responding to insulin and become resistant. Insulin resistance is a precursor for prediabetes and type 2 diabetes. Independent of body mass index (BMI), insulin ...

Certain white blood cells protect us from bacteria by engulfing them. A research team has now observed the process under the microscope, thanks to novel fluorescent proteins.

And for the image, he chose a simple black-and-white photo of a hand. “It harkens back to the first images that humankind put in the natural world—handprints on cave walls,” he says.