National Park Service photo Imagine an ear falling off a first century Roman ... how the fossil came to their attention. Evidence of human occupation at the park dates back 10,000 years.

The authors reasoned that many similarities between the appearance of cartilage under the microscope for zebrafish gills and human ears cannot be just a coincidence. Knowing that both the gills ...

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Research links human outer ears to cartilage in fish gills. Gene-editing experiments confirm evolutionary connection. Findings date back to marine invertebrates 400 million years ago. New research has ...

To explore this link, scientists used gene enhancers — DNA sequences that control tissue development. Remarkably, when human ear enhancers were introduced into zebrafish, they activated specifically ...