Scientists recovered proteins from the tooth of an extinct rhinoceros found in Canada's high Arctic, dating to between 21 million and 24 million years old, far older than the previous widely accepted protein record of 3.5 million years.
Sources
- The Ten Most Significant Science Stories of 2025, From Medical ... (smithsonianmag.com)
- https://www.nature.com/articles/s41586-025-09231-4 (nature.com)
- https://www.cnn.com/2025/07/15/science/ancient-protein-rhino-fossil (cnn.com)
- https://www.science.org/content/article/record-setting-recovery-ancient-protein-used-identify-extinct-rhino-relative (science.org)
- https://www.scientificamerican.com/article/ancient-tooth-proteins-rewrite-the-rhino-family-tree-are-dinosaurs-next/ (scientificamerican.com)
- https://www.cbc.ca/news/canada/north/ancient-dna-rhino-1.7581115 (cbc.ca)
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