Joe Palca is a science correspondent for NPR. Since joining NPR in 1992, Palca has covered a range of science topics — everything from biomedical research to astronomy. He is currently focused on the eponymous series, "Joe's Big Idea." Stories in the series explore the minds and motivations of scientists and inventors. Palca is also the founder of NPR Scicommers – A science communication collective.
Three years ago, councilmembers in Washington, D.C., approved a tax hike on the wealthy as a way to raise the wages of child care workers. It's led to big gains for the city's child care workforce.
This year marks 30 years since the release of Mariah Carey's hit, "All I Want for Christmas is You." But have any other pop singles been able to enter the holiday music canon since?