The biggest science breakthroughs in 2023

Read more about the major science breakthroughs of 2023: 0:00 Breakthrough of the Year: GLP-1 therapies 0:26 The exascale era 0:57 Early footsteps in the Americas 1:32 Hunting for natural hydrogen 2:08 Malaria vaccines poised to make an impact 2:33 Earth's carbon pump is slowing 3:08 Early career scientists rise up 3:43 Supermassive black hole merger 4:20 Modest headway against Alzheimer's 4:53 AI weather models arrive