Experimental evidence of a liquid-liquid critical point in supercooled water. - You, Seonju; Ladd-Parada, Marjorie; Nam, Kyeongmin; Karina, Aigerim; Lee, Seoyoung; Shin, Myeongsik; Yang, Cheolhee; Han, Yeseul; Jeong, Sangmin; Park, Kichan; Kim, Kyeongwon; Ki, Minjeong; et al. (Science, 2026)