11/15/2024

Ancient Bird Fossil Offers Clues Into How Bird Brains Evolved

Three birds, ranging from most ancient on the left to modern-day birds on the right. In the center is Navaornis hestiae. All three birds have an illustration over their heads that shows how their brains have evolved over time.
Navaornis hestiae (center) documents a previously unknown intermediate stage in the evolution of the central nervous system between the earliest birds (like Archaeopteryx on the left) and living birds (like the green-headed tanager, on the right). Artwork from Júlia d’Oliveira

Archaeopteryx is the earliest bird-like dinosaur that we know of. It lived 150 million years ago, but researchers don’t know much about how the bird brain evolved from then to now.

A fossilized skeleton of a bird, embedded in a rock.
Navaornis skeleton. Credit: Stephanie Abramowicz.

An 80 million-year-old bird from the Mesozoic Era is now helping fill in the blanks. It’s called Navaornis hestiae. Researchers uncovered a fossil of this species, which was previously unknown to science, in Brazil in 2016. That specimen has a remarkably well-preserved skull, which a team of paleontologists used to digitally reconstruct the bird’s brain. The researchers recently reported their findings in the journal Nature.

Ira talks with a lead author of the study, Dr. Luis Chiappe, a paleontologist and curator at the Natural History Museum of Los Angeles County in California.


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Segment Guests

Luis Chiappe

Dr. Luis Chiappe is a paleontologist and curator at the Natural History Museum of Los Angeles County in Los Angeles, California.

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Rasha Aridi is a producer for Science Friday. She loves stories about weird critters, science adventures, and the intersection of science and history.

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Ira Flatow is the host and executive producer of Science FridayHis green thumb has revived many an office plant at death’s door.

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