An international team of scientists led by Dr. Graciela Delvene of the Geological and Mining Institute of Spain (CSIC) has uncovered the oldest known evidence of maternal care in shellfish, revealing that some freshwater species were protecting and incubating their young more than 125 million ye...

Source: [Phys.org](https://phys.org/news/2026-06-million-year-fossil-reveals-pregnant.html)

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