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Troodontidae / t r oʊ. ə ˈ d ɒ n t ɪ d iː / is a clade of bird-like theropod dinosaurs from the Late Jurassic to Late Cretaceous. During most of the 20th century, troodontid fossils were few and incomplete and they have therefore been allied, at various times, with many dinosaurian lineages.
The content is presented as a series of questions pertaining to the subject of the particular chapter of the books. Amid the questions, pictures and photographs, there are details from established comic strips and complete comic strips, occasionally with its dialogue adjusted to the chapter's theme.
A turning point came in the early twentieth century with the writings of Gerhard Heilmann of Denmark.An artist by trade, Heilmann had a scholarly interest in birds and from 1913 to 1916, expanding on earlier work by Othenio Abel, [12] published the results of his research in several parts, dealing with the anatomy, embryology, behavior, paleontology, and evolution of birds. [13]
Holtz and others noted similarities in the teeth of troodontids and iguanine lizards and suggested that the former family may not have been strict carnivores. [4] Holtz found that troodontids were the sister group to the ornithomimosaurs. [2] Catherine Forster and others found that troodontids were the sister group of the avialans. [2]
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A new crackdown on books in Florida schools has had a chilling effect in classrooms. Voices: I’m a teacher in Florida. Here’s what the DeSantis book bans look like in my classroom