Amid R.F.K., Jr.,’s vandalism of the public-health system, there’s shocking good news about a cancer-preventing vaccine.

The risk of nuclear war has only grown, yet the public and government officials are increasingly cavalier. Some experts are trying to change that.

R.F.K., Jr., and the MAHA movement are at war with synthetic food dyes. Scientists are racing to reinvent the culinary color wheel.

It’s clear that we’re on the precipice of a surge in preventable diseases. But how bad will it get?