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You have full access to this article via your institution. Hello Nature readers, would you like to get this Briefing in your inbox free every day? Sign up here . Sharif University of Technology after it was bombed on 7 April 2026. Credit: Fatemeh Bahrami/Anadolu via Getty Bombing by the United States and Israel have damaged some of Iran’s universities and hospitals , researchers tell Nature . One of the damaged institutions is the Shefa Neuroscience Research Center in Tehran, according to Ali Gorji, a neuroscientist in Germany who supervises PhD students at the Shefa centre. “If attacks on universities become a normal thing, then they can happen in any future stupid war. And this idea is much more destructive than attacking a single building,” he says. A White House spokesperson and a representative of Israel’s military separately told Nature that they do not target civilian infrastructure, but did not explain why these and other institutions were bombed. Nature | 8 min read All life on Earth depends on the same molecular alphabet: 20 amino acids that cells string together to make proteins. But now, scientists have engineered bacteria to run a core part of their cellular machinery — the ribosome — with just 19 of those amino acids . Researchers took advantage of recent advances in generative artificial intelligence to create proteins that worked without the amino acid isoleucine. …