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Readers weigh in on dinos, dark matter and more

Your letters and comments on the November 12, 2016, and November 26, 2016, issues of Science News

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12:15pm, January 11, 2017

Prehistoric tweet

Researchers uncovered the fossilized voice box, called a syrinx, of an ancient bird that lived 68 million to 66 million years ago. The bird may have sounded like a honking duck, Meghan Rosen reported in “Ancient avian voice box unearthed” (SN: 11/12/16, p. 7).

Online reader David Spector wondered if researchers could 3-D print the syrinx to replicate the ancient bird’s squawks. “I’ll bet such sounds would make researchers ‘chortle’ even more,” he wrote.

Re-creating rigid rings of the syrinx is probably doable, but researchers still may not hear how the bird sounded. The organ’s soft

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