![]() ![]() ![]() But that’s a busted myth-the empty space likely held a mass of tissue that might have helped produce extra energy or was simply a fluid-filled gland.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.This Time in History In these videos, find out what happened this month (or any month!) in history.Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.Britannica Beyond We’ve created a new place where questions are at the center of learning.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians. Various hypotheses have attempted to explain the arrangement and use of the plates. Paleontologists had long thought that Stegosaurus had two parallel rows of plates, either staggered or paired, and that these afforded protection to the animal’s backbone and spinal cord. However, new discoveries and reexamination of existing Stegosaurus specimens since the 1970s suggest that the plates alternated along the backbone, as no two plates from the same animal have exactly the same shape or size. Because the plates contained many blood vessels, the alternating placement appears consistent with a hypothesis of thermoregulation. ![]()
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