Komodo Dragons are not only the largest lizard on Earth but also one of the most ferocious species with a fearsome reputation. The carnivorous beast can grow up to 10 feet long and can detect flesh from miles away. However, the Komodo Dragon’s serrated teeth, armored scales, and venom-laced saliva are still being outmatched by its biggest competitor: extinction.
The Komodo Dragon was previously named a “vulnerable” species by the conservation organization before being reclassified as “endangered.” There is hope that this change in status will encourage policymakers and conservation groups to strengthen and expand protections.
25 years ago, there were somewhere between 5,000 and 8,000 Komodo Dragons. Today, there are an estimated 1,380 adults and 2,000 juveniles in the wild. The Komodo Dragon is moving towards extinction.
A new approach to dinosaur embryology has revealed another layer to our understanding of the demise of dinosaurs and rise of mammals as a result of the end-Cretaceous mass extinction event. In a recent Proceedings of the National Academy of Sciences paper, a group of researchers led by Gregory Erickson hypothesized that dinosaur eggs may have growth lines present on embryonic teeth that could be used to determine incubation times.
Not much is understood about dinosaur embryology, aside from what is known about birds. This is in part because fossils of dinosaur eggs, especially those containing embryonic skeletons, are among the rarest in the world. Despite this difficulty, using these fossils to refine estimated incubation times of dinosaur embryos can shed light on their development, life history and evolution.
Historically, paleontologists have assumed that dinosaur incubation periods were rapid based on their extant counterparts, birds. Considered living dinosaurs, birds are a logical surrogate from which to extrapolate dinosaur incubation times. It is important to note that embryonic incubation in birds is different from other living relatives of dinosaurs, modern reptiles. While reptile embryos develop slowly, birds differ by laying fewer, larger eggs with rapid incubation. Continue reading “Did Dinosaurs Take Too Long to Hatch?”
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