How can scientists learn about the color of extinct animals?

• A. By studying bone density.
• B. By examining fossilized feathers for melanosomes.
• C. By measuring fossil age.
• D. By analyzing DNA from fossils.

Answer: (B)

Color in extinct animals is inferred by analyzing pigment-containing structures preserved in fossils. In many fossils, especially feathers, these structures are melanosomes, tiny organelles that encode pigment information. Scientists image them with high-resolution methods like electron microscopy to see their shape, size, and how they’re arranged on the fossil. The shape of melanosomes relates to pigment types: elongated melanosomes correspond to eumelanin (giving dark tones), while round melanosomes relate to pheomelanin (reddish-brown tones). By mapping where these melanosomes occur, researchers can reconstruct color patterns and even overall coloration.

This approach is particularly powerful for feathered dinosaurs and early birds, where detailed color patterns can be recovered. While DNA from fossils can sometimes offer clues about color genes, it’s often degraded and less reliable for painting a full picture, and factors like bone density or fossil age don’t reveal pigment information. Melanosome analysis provides a direct link between preserved tissue evidence and color.