Analyzing the chemistry of some ancient teeth has revealed what human ancestors were eating around 3 million years ago.

When companies like Aetna or UnitedHealthcare want to rein in costs, they turn to EviCore, whose business model depends on turning down payments for care recommended by doctors for their patients.

The ongoing H5N1 outbreak presents a critical test of the United States' ability to apply the hard-earned lessons of a recent health emergencies. The time to act is not when the threat becomes unmanag...