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It's time to discuss one of the perennial debates of the holiday season. Are real Christmas trees or their fake counterparts more eco-friendly?

Industry demand for the "sustainable seafood" label, issued by the Marine Stewardship Council, is increasing. But some environmentalists fear fisheries are being certified despite evidence showing that the fish population is in trouble — or when there's not enough information to know the impact on the oceans.

From a young age, Caroline Solomon wanted a career in science. She also wanted to help other deaf and hard-of-hearing people defy the odds. Now, she's considered a role model at Gallaudet University.

Certain diagnoses are harder to catch without an in-person connection. And beyond that, a doctor reflects on the loss of a ritual that can provide "real comfort and meaning" to physician and patient.

President Trump said the health agency delayed raising the alarm on the threat from the new coronavirus. A WHO expert says that in early January, the World Health Organization "was very, very clear."

The Millennium Development Goals, set in 2000, revolutionized the fight against poverty. Now the world is setting Sustainable Development Goals. But critics say there may be too many priorities.

Human brains are still developing throughout our teenage and early adult years. Knowing more about the way they work can teach us about how schools can work, too.

Photojournalist Gideon Mendel has made it his mission to show how ordinary people around the world are affected by the consequences of a changing climate.

The number of pelicans and other shorebirds with hooks in their pouches or stomachs, or fishing line wrapped tight around their legs or beaks dropped by 58 percent across the region after Hurricane Ian in 2022.

Scientists urge divers, recreational charters, residents and visitors exploring the waters of South Florida to look for an invasive soft coral species that has been reported on the nearby surrounding shores of Cuba.The invasive pulse corals, a species within the Xeniidae family, are native to the Indo-Pacific and the Red seas. Several species of pulse corals have been discovered growing outside their native range into Hawaii, Venezuela, Cuba and Puerto Rico. Pulse corals reproduce rapidly, including asexually by fragmentation, and can overgrow coral reefs and seagrass meadows, with potentially devastating impacts.