Ukraine's Sacrifice, Murdoch's Retirement, Saltwater Wedge, China's DNA Collection, Oral Hygiene and Dementia, NASA's Asteroid Mission

A roundup of diverse topics including Ukraine's role in global security, Rupert Murdoch's resignation, a saltwater wedge in the Mississippi River, China's DNA data collection, oral hygiene and dementia risk, and NASA's asteroid mission. Also features insights into the podcast's staff and production.