Direct observation of bimolecular reactions of ultracold KRb molecules. - Hu, M.-G.; Liu, Y.; Grimes, D. D.; Lin, Y.-W.; Gheorghe, A. H.; Vexiau, R.; Bouloufa-Maafa, N.; Dulieu, O.; Rosenband, T.; Ni, K.-K. (Science (pre-March 2025), 2019)