Karen Weintraub

The facility lies midway between Munich’s city center and its international airport, roughly 23 miles to the north. From the outside, it still looks like the state-run farm it once was, but peer through the windows of the old farmhouse and you’ll see rooms stuffed with...

Getting sick with measles does not just result in a dangerous infection that causes itchy blisters. It can leave the immune system vulnerable to other infections for some time to come, a new study has found.

Although there had been earlier hints of such "immune amnesia,...

Watching Snowball the cockatoo dance to Queen’s “Another One Bites the Dust” has long been one of the joys of the internet.

The four-minute video has been viewed more than seven million times, and it’s probably generated at least that many grins. But when a small group...

The Antarctic’s second-largest colony of emperor penguins collapsed in 2016, with more than 10,000 chicks lost, and the population has not recovered, according to a new study.Many of the adults relocated nearby, satellite imagery shows, but the fact that emperor pengui...

All serious butterfly collectors remember their first gynandromorph: a butterfly with a color and pattern that are distinctly male on one wing and female on the other.

Seeing one sparks wonder and curiosity. For the biologist Nipam H. Patel, the sighting offered a possi...

A bird hopping outside the window lately is the strangest that Shirley and Jeffrey Caldwell have ever seen.

Its left side is the taupe shade of female cardinals; its right, the signature scarlet of males.

Researchers believe that the cardinal frequenting the Caldwells’ b...

BOSTON — Hoppy,  a young red panda, was the first patient of the day, carried —  and anesthetized — into the exam room so he could get a physical.

Then Mildred, a 24-year-old barnacle goose, wobbled painfully across the floor as veterinarians analyzed her gait. The...

Leonid Peshkin calmly strokes his father’s thin, white hair. He gently exercises the old man’s arms to acivate his muscles and get the blood flowing. He speaks, voice raised to reach him through the fog of age, poor hearing, and illness. “Papa,” he asks in their native...