Several outlets are highlighting the biggest scientific discoveries of 2023, with some also looking back at major breakthroughs of the past 25 years or the 21st century. There appears to be a range of significant findings, with some sources noting that new tools are driving discovery, while others are questioning the impact of recent breakthroughs. Various publications, including National Geographic, Smithsonian Magazine, and Physics World, are showcasing their picks for the most notable scientific discoveries of 2023.