Takanori Takebe is on a mission to find out if people can breathe through their butts. As a medical doctor and stem cell biologist, Takebe spends most of his time trying to develop lab-made livers to ...

After losing his title to Muhammad Ali, the boxer sank into a depression that ended only after he was born again.

This week’s science roundup covers 2025’s near-record heat, a new mpox strain and fresh clues about why hobbits vanished 50,000 years ago. Journalist Karen Hao unpacks the rise of AI “empires,” their ...

Eating high-fiber foods like whole grains and legumes helps relieve constipation. Drinking plenty of water can soften dry stools and improve digestion. Abdominal massage and regular exercise are other ...

A pulse oximeter measures blood oxygen levels at home and in healthcare settings. Abnormally low readings on a pulse oximeter might require medical care, especially if they are below 92%. Skin color ...