Cow udders have the same receptors for flu viruses as humans and birds, raising concerns that cows could become “mixing vessels” that help the bird flu virus spread between people.

Estimates show that by 2040, age-related macular degeneration may affect nearly 300 million people worldwide. And we are very limited in our ability to treat or prevent it. Here's what to know.

Turn around those bad family genes with four lifestyle changes.

Vegans and vegetarians sleep around 30 more minutes per night than average and up to 90% of them report good or excellent sleep quality, according to a new survey published by the Sleep Foundation.

Many new mothers aren’t aware that postpartum PTSD even exists, but it’s far from rare. Here's what to know.

After falling for over a decade, the death rate climbed for several years and now is about the same as in 1999.