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In addition to reductions at agency personnel, federal regulators are demanding $2.9 billion in contract cancellations, The Times has learned.

The facility, in Colstrip, Mont., used a new E.P.A. system for requesting special waivers from President Trump.

It wasn't the size of human brains that distinguished people from apes, he theorized, but the way they were organized. He found a creative way to prove it.

The reorganization that began on Tuesday will scale back an agency that has been a public health model around the world.

The move threatens to paralyze the Low Income Home Energy Assistance Program, which helps to offset high utility bills for roughly 6.2 million people nationwide.

A growing body of research suggests that preventing the viral infection can help stave off cognitive decline.

A new survey found that 11 percent of Americans said they could not pay for medication and medical treatments.

Before a discovery in a Panamanian rainforest, "it seemed impossible that lightning could be a good thing for the trees," a scientist said.

Health Secretary Robert F. Kennedy Jr. suggests that laying off thousands of federal workers would tame a massive budget. But nearly all of the agency's money goes to hospitals, doctors and nursing homes.

Senator Josh Hawley, a Republican, pressed Dr. Oz on transgender care and abortion, and now says he will vote for the physician's confirmation to become head of Medicare and Medicaid.