New research by NOAA Fisheries has revealed the opah, or moonfish, as the first fully warm-blooded fish that circulates heated blood throughout its body much like mammals and birds, giving it a competitive advantage in the .
Zika virus infection during pregnancy can lead to congenital Zika syndrome, a pattern of birth defects in babies that includes brain defects, vision problems, and hearing loss. Learn more about the effects Zika could have on babies in the latest Vital Signs.
Triple-negative breast cancer (a cancer that doesn’t respond to hormone therapy) can mean a tough road ahead, but chemotherapy and surgery can be very successful. Survivor Joan Lunden shares her story in her new video.