The puppy appears to have an extra tail on his face, but things are not what they seem.
Venice is in a state of emergency as the Italian city braces from one of the worst floods in its history.
Experts once thought that older, more robust sea ice in the Arctic was mostly safe from melting — but that may not be the case.
The tumor had swelled from the size of a cherry tomato to that of a melon over the course of seven months.
A man whose iris appeared to glow on an eye exam turned out to have a rare disorder that caused his eye pigment to flake off.
A previously unknown species of primitive bird has a tail feature associated with flight in modern birds.
Explaining how something as complex as consciousness can emerge from a grey, jelly-like lump of tissue in the head is arguably the greatest scientific challenge of our time.
Up to 90% of people are right-handed. Scientists are still trying to figure out why lefties have always been in the minority.