Why have dozens of great white sharks turned up around Southern California beaches recently? Finding the answer led to a close-up view of a baby great white shark — and the researcher who caught her.

The top complaint about nursing homes isn't the food — it's wrongful eviction. Advocates say nursing homes want residents who pay more but require less care.

There are only 30 vaquitas left, due to over-fishing. Efforts to save the species have pitted environmentalists against fishermen.

The latest evidence that a chocolate habit may lower your risk of heart disease: A study finds people who ate small amounts of chocolate several times a week had a lower risk of atrial fibrillation.

Whales might be the largest animals on the planet, but they haven't always been so huge. Researchers say the ocean giants only became enormous fairly recently, and over a short period of time.

A study of seven popular fitness trackers found they are generally good at measuring heart rate, but may mislead consumers about how many calories they have burned.

In the late 19th century, French inventor Edouard-Leon Scott de Martinville patented the earliest known sound recording device. But his accomplishments were only recognized recently.

An explosion after an Ariana Grande concert killed 22 people Monday night. Police say they believe the bomber attacked alone. But they also report making at least one related arrest.

Pollen allergies can trigger allergic reactions to fruits and vegetables.The condition – known as Oral Allergy Syndrome – can come on suddenly and often goes undiagnosed.

Two travel tips are often overlooked by clinicians, and can be especially helpful when people are headed to places with less-than-ideal plumbing and sewage systems.