Trump Sparks Fluoridation Debate, Study Questions mRNA Vaccine Immunity, Study Links Cannabis Use to Brain Changes, Mars Rivers Melted by CO2, and more...

(0:10): Trump's Potential Ban on Fluoridation Sparks Renewed Debate Over Public Health in U.S.(2:15): Study Reveals mRNA COVID-19 Vaccines Lack Long-Term Immunity, Urges New Vaccine Strategies(4:02): Study Links Adolescent Cannabis Use to Brain Cortex Thinning and Impaired Functioning(6:14): Mars' Ancient Rivers: Carbon Dioxide, Not Climate, Melted Polar Ice for Flowing Water(8:28): First-Ever Leucism Case in Endangered Spotted Roughshark Discovered Off Albania CoastTo subscribe visit https://www.brief.news.For more updates in your inbox each morning visit www.brief.news. Image credit: Boston.com