Did Dinosaur Flight Evolve More Than Once? | Biodiversity’s Biggest Event Is Underway

Some paleontologists argue the ancient footprints found in South Korea show flight may have evolved in multiple dinosaur lineages. And, COP16 will tackle questions like who should profit from non-human DNA, and who is responsible for financing critical conservation projects.

Researchers studying tracks fossilized in Cretaceous-era lakeshore mud in what is now South Korea argue this week in Proceedings of the National Academy of Sciences that the dinosaur footprints are “indirect evidence of pre-avian aerial behavior” in a tiny microraptor.

The tracks, which belong to a sparrow-sized theropod related to Tyrannosaurus rex, are spaced far enough apart to indicate that the tiny dino was moving across the mud very quickly. That speed, the researchers argue, is faster than the animal should have been able to go just by running with its hindlimbs. However, if flapping wings were added into the equation to give a power boost, the spacing might make sense.

If the microraptor did, in fact, have flight-capable wings, that would mean that the ability to fly may have evolved in multiple lineages of dinosaurs, not just the descendants of Archaeopteryx we see as modern birds. Other researchers are not convinced of the analysis, arguing that the tracks may not all have come from the same individual at the same time.

Jason Dinh, climate editor for Atmos, joins guest host Sophie Bushswick to talk about the debate, and other stories from the week in science, including an archeological find of medieval-era Silk Road cities in the Uzbek mountains, breathing differences in people born with the inability to smell, and the surprising ability of hornets to hold their liquor.

From now until November 1, bureaucrats from nearly every country in the world will be gathered in Cali, Colombia, for COP16, better known as the United Nations biodiversity summit. This “conference of the parties” comes together about every two years to deliberate on the biggest issue in conservation science: how to stop ecological collapse.

At the last summit, COP15, nearly every country agreed to a deal to halt biodiversity loss by 2030. This year’s conference will take a temperature check on how nations are doing in their quest to meet this goal (spoiler alert: not well).

Also on the agenda are the questions of who should profit from non-human DNA, and how a $700 billion funding gap for conservation work can be filled. Joining guest host Sophie Bushwick to parse through these big ideas is Benji Jones, environmental correspondent for Vox based in New York.

Transcripts for each segment will be available after the show airs on sciencefriday.com.

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