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Dolphins may rub on specific corals and sponges to treat their skin, researchers reported Thursday in the journal iScience. These stationary sea creatures may serve as drive-by pharmacies, dispensing a chemical cocktail that could treat bacterial or fungal infections or support skin health. The scientists said that cetaceans have not been observed self-medicating before. Some of these molecules may serve as immune boosters or sunscreens, said Julia Kubanek, professor in the School of Biological Sciences and School of Chemistry and Biochemistry, and vice president of Interdisciplinary Research, who wasn’t part of the work. People have known about corals’ and sponges’ medicinal properties for around 50 years, Kubanek said. “But dolphins may have known about how to use marine organisms as medicines much longer than we have,” she added.

Chemists say they have solved a crucial problem in a theory of life’s beginnings, by demonstrating that RNA molecules can link short chains of amino acids together. The findings, published in Nature, support a variation on the ‘RNA world’ hypothesis, which proposes that before the evolution of DNA and the proteins it encodes, the first organisms were based on strands of RNA, a molecule that can both store genetic information — as sequences of the nucleosides A, C, G and U — and act as a catalyst for chemical reactions. “If the origins of RNA and the origins of protein are linked, and their emergence is not independent, then the math shifts radically in favor of an RNA–protein world and away from an RNA world,” says Loren Williams, professor in the School of Chemistry and Biochemistry who was not involved in the study.