CDC says "pivotal discovery" about Delta variant prompted new mask guidance

2022-03-18 CDC says "pivotal discovery" about Delta variant prompted new mask guidance Atlantic hurricane season may be busier than first thought Light spotted behind black hole for first time, proving Einstein right Florida breaks single-day record of COVID-19 cases Emperor penguins may be listed as threatened due to climate change Book excerpt: "Sound of the Sea" by Cynthia Barnett California to mandate COVID vaccines for health care workers Hot, windy weather could intensify fires this week, officials warn California tourist town running out of water amid drought