Once used by vets to anesthetize elephants, carfentanil is now an extremely dangerous illicit drug often disguised as an oxycodone tablet—and it's 100 times stronger than fentanyl.

Chalk up another victory for “Conan the Bacterium”—a rugged germ that fresh research suggests could conquer the solar system.

Certain species of wasps and frogs share a pain and inflammation peptide similar to one found in vertebrates to help defend against predators—a discovery that contributes to a shifting view of how ...

The next time you stub your toe, get pricked with a needle, or have your fingers jammed in the lid of a piano, you might pause to consider the marvellous way our bodies are able to heal such injuries.

A new study suggests that the deadly insects evolved their taste for human blood much earlier than previously thought, around when Homo erectus migrated into Southeast Asia ...

Our immune system relies on T cells to fight infections. But T cells don't just show up and react—first, they train, get a game plan, and coordinate their defenses in lymphoid organs. Researchers have ...

Affecting roughly half a million Americans each year, bacterial infections caused by Clostridioides difficile—commonly known ...

A resurrected ancient enzyme is helping scientists test how reliably Earth’s oldest rocks record signs of life.

Fungal pathogens remain a significant cause of disease in humans and animals, especially as antifungal resistance rises and vulnerable patient populations ...