New antidote rapidly clears carbon monoxide from blood

New engineered protein clears CO from blood in minutes, promising safer treatment for poisoning.

Dolphins and whales engage in playful interactions.

Researchers find dolphins and whales often engage in playful interactions, with whales responding positively.

Gut bacteria linked to insomnia in massive study

A study of nearly 400,000 people found that certain gut bacteria increase or decrease the risk of insomnia.

Ancient teeth reveal coexisting human lineages.

Fossilized teeth from 2.6 million years ago reveal two ancient human lineages coexisted in Ethiopia.