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. 2020 Nov 11;10:19602. doi: 10.1038/s41598-020-76757-0

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Boxplot of neutral head posture (left) and reconstructed cranial orientation (right) in degrees (°) in species with body mass below 100 kg (< 100 kg) and species with body mass superior or equal to 100 kg (≥ 100 kg). The average angle for each category is indicated in the corresponding boxplot. n represents the number of species in each category.