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Anatomy

Dissecting the anatomy of a ‘superheroic’ science class

How the cat nose knows what it’s smelling

Bone cavities called air sacs appeared in the ancestors of long-necked dinosaurs about 225 million years ago, according to the analysis of a specimen found in Rio Grande do Sul state, South Brazil. The study also shows that air sacs did not evolve as linearly as scientists believe (credit: Márcio L. Castro)

Brazilian fossil provides earliest evidence of evolutionary trait that enabled dinosaurs to become giants

New research finds there is significant variation in the anatomy of the human digestive system, with pronounced differences possible between healthy individuals. The finding has implications for understanding the role that the digestive tract’s anatomy can play in affecting human health, as well as providing potential insights into medical diagnoses and the microbial ecosystem of the gut. In this photo, a researcher takes a gut measurement in the lab.

Study finds significant variation in anatomy of human guts

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