The veto by Mayor Daniella Levine Cava, a Democrat, pushed back on a growing campaign against the mineral, which has been used for decades to prevent cavities.
A draft global agreement sets a fee for cargo ships, which carry the vast majority of world trade, to pay for their greenhouse gas emissions.
The nation’s health secretary announced that he planned to invite scientists to provide answers by September, but specialists consider that target date unrealistic.
President Trump’s immigration crackdown ensnared Kseniia Petrova, a scientist who fled Russia after protesting its invasion of Ukraine. She fears arrest if she is deported there.
A bone discovered in Taiwan turns out to have belonged to a Denisovan, a lineage previously identified only thousands of miles away.