A small tissue fold in fly embryos, once thought purposeless, plays a vital role in stabilizing tissues. Researchers show that it absorbs stress during early development, and its position and timing ...

Stem cell aging is potentially worrisome because it diminishes the body’s natural ability to repair tissues and organs.

Topline President Donald Trump’s approval rating went up in two polls this week, dipped slightly in another and held steady in two others—as surveys show Americans are nearly evenly split on ...