Nature, Published online: 12 March 2026; doi:10.1038/d41586-026-00594-wSharks might not be a natural biological group, with most species potentially closer kin to rays than to an oddball group of sharks.

Nature, Published online: 10 March 2026; doi:10.1038/d41586-026-00786-4Researchers simulated nearly every molecule in a bacterial cell — and then watched the cell grow and reproduce.