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Federal health officials have pared back the number of shots recommended for children. The states, led by Democrats, say the changes were not based on science.

The nation's northern region has led the scientific quest to understand the aurora borealis. This summer, a 10,000-antenna radar is expected to begin the next phase of exploration.

Ms. Stavenhagen started a group intended to counter the notion that A.L.S. was an "older white man's disease."

Dr. Ralph Abraham, the agency's principal deputy director, has called the Covid vaccines "dangerous." Other skeptics have recently left federal health roles.

Horses, with their high-pitched whinnies, seemed to buck the trend of larger animals producing lower sounds, but a new study explains the mechanics behind the noises a horse makes.

Even Charles Darwin was puzzled by the evolution of the vertebrate eye. New research suggests that it traces back to a cyclopean invertebrate with a single eye atop the head.

The case could have significant bearing on a range of other lawsuits brought against the fossil fuel industry by cities and states across the country.

Living in urban China may have given the insects the traits they needed to thrive in the United States, a new study suggests.

An interruption in the flow of helium to the upper stage may require that the rocket be removed from the launchpad for repairs.

The next moon mission, carrying four astronauts, could launch as soon as early March.