Your letters and comments on the March 3, 2018 issue of Science News
Some scientists are shaking up the dinosaur family tree and raising questions about which features define the ancient reptiles, Carolyn Gramling reported in “New fossils are redefining what makes a dinosaur” (SN: 3/3/18, p. 18).
“I am a bit put out by the continuing references to dinosaurs as being reptiles,” reader David Persuitte wrote. Dinosaurs’ legs were positioned differently than those of modern reptiles, he noted, and many species may have regulated their body temperature, possibly with feathers. “Dinosaurs should not be referred to anymore as being reptiles,” Persuitte wrote, but should instead