165-Million-Year-Old Fossil Reveals Early Mammal Traits That Shaped Survival
Scientists studying a 165-million-year-old fossil from China have identified an unusually broad swimming tail and bony throat structures, offering a rare look at how early mammals adapted to aquatic life during the Jurassic. The find adds weight to the view that several mammal-like features emerged far earlier than previously believed, reshaping understanding of mammalian evolution.
