2026-07-04 Briefing

As the US marks its 250th anniversary, political turmoil deepens with parallels drawn to its founding revolution against a &lsquo;mad king&rsquo; amid Trump&rsquo;s return, echoing warnings of self-destruction. In science, a Texas A&M nasal spray reversed brain aging in mice, restoring memory after two doses. Meanwhile, researchers discovered 26 new bacterial species in NASA cleanrooms, surviving…