Suddenly, John McEnroe and Serena Williams are involved in a tennis match of words, and the pace picked up Tuesday. Both are rushing the net — stick with the metaphor here — and firing volleys.

First it was McEnroe, who told NPR's Lulu Garcia-Navarro on Sunday that while Williams is "an incredible player," (she's won 23 major singles titles and 14 in doubles) she'd be "like 700 in the world" if she played on the men's circuit.

Updated 2:30 p.m. ET

Facing a perilous path for their health care bill, Senate Republican leaders have decided to push off a vote on their health care bill until after Congress returns from next week's July Fourth recess, GOP aides confirm to NPR's Susan Davis. The delay comes on a day in which President Trump was working to twist some arms and when several GOP senators were saying they were against bringing the bill to the floor this week.

If you've never heard of Alexander von Humboldt, a once world-renowned Prussian scientist who predicted man-made climate change in 1800 and was an adviser to President Thomas Jefferson, then a New Hampshire distillery is aiming to change that, one glass at a time.

Updated at 1:21 p.m. ET

Ransomware hit at least six countries Tuesday, including Ukraine, where it was blamed for a large and coordinated attack on key parts of Ukraine's infrastructure, from government agencies and electric grids to stores and banks.

The malware is being called "Petya" — but in the security community, there is a debate over whether the ransomware is new or a variant that has been enhanced to make it harder to stop.

States are not doing enough to improve safety on the roads, in the workplace and in the home, according to a new report from the National Safety Council.

The group, which graded all 50 states on safety, awarded no state an "A" grade for overall safety, but 11 states received an "F."

There's a big push in the U.S. from pediatricians to have mothers of newborns breast-feed exclusively for at least six months.

And many new moms want to. But only about 60 percent who start off breast-feeding keep it up for six months or more, according to the Centers for Disease Control and Prevention.