\n\n<\/div><\/figure> Perucetus colossus<\/em> was discovered in Peru 13 years ago by Peruvian palaeontologist, and co-author on this study, Mario Urbina. Since that time, scientists have been estimating the whale\u2019s size and weight based on its partial skeleton.<\/p> \u201cWe kept the project ultra-secret during all these years,\u201d one of the paper\u2019s authors <a href=\"https:\/\/www.naturkundemuseum-bw.de\/en\/research\/paleontology\/department-paleontology\/eli-amson\" target=\"_blank\" rel=\"noreferrer noopener\">Dr Eli Amson<\/a>, mammal fossil curator at Stuttgart State University of Natural History, Germany, told BBC Science Focus<\/em>.<\/p> But what did it look like, and how did it move? With a tiny head and a huge body, there is a lot of room for speculation.<\/p> \u201cThe head of\u00a0Perucetus\u00a0<\/em>is a complete mystery,\u201d Amson said. \u201cPerucetus\u00a0<\/em>was most likely not an agile swimmer \u2013 can you imagine the inertia of such a tremendous body? Considering its enormous mass and swimming style,\u00a0Perucetus\u00a0<\/em>moved very slowly.\u201d<\/p>\n<figure class=\"wp-block-image size-full\"><figcaption class=\"wp-element-caption\">3D models of the fleshed-out skeleton of P. colossus (top right), alongside a blue whale (middle) and a smaller, close relative of P colossus called the Cynthiacetus peruvians (bottom). A human snorkeller (top left) is included for scale. \u2013 Image credit: Trustees of the Natural History Museum; Marco Merella for the Perucetus colossus model and all fleshed out models. Florent Goussard for C. peruvianus\u2019 skeleton model and staff in the Imaging and Analysis Centre at the Natural History Museum London for the blue whale\u2019s skeleton model.<\/figcaption><\/figure> The discovery suggests that gigantism in marine animals began much earlier than we thought.<\/p> In evolutionary history, scientists previously thought that cetaceans \u2013 type mammals including dolphins and whales \u2013 might have been part of the movement of terrestrial mammals back to the ocean.<\/p> Previous fossil records have helped to identify adaptations to a marine environment \u2013 including a trend towards gigantism. One of the benefits of being so big is better body temperature regulation.<\/p> The new addition of Perucetus colossus<\/em> to the fossil record reveals much about marine <a href=\"https:\/\/www.sciencefocus.com\/nature\/evolution\/\">evolution<\/a>. The estimations of the ancient whale\u2019s size suggest, in fact, that cetaceans reached peak body mass 30 million years before we thought.<\/p> About our expert:<\/strong><\/p> Dr Eli Amson is the curator of mammal fossils at Stuttgart State University of Natural History, Germany. His research has been published in Evolution Letters<\/em>, the Journal of Mammalian Evolution<\/em>, and Evolutionary Biology<\/em>.<\/p> Read more:<\/strong><\/p> <ul>\n<li><a href=\"https:\/\/www.sciencefocus.com\/news\/how-sauropod-dinosaurs-got-big\">Size matters: Breakthrough study reveals how super-massive dinosaurs got so big<\/a><\/li> <li><a href=\"https:\/\/www.sciencefocus.com\/news\/blue-whales-heart-rate-can-drop-to-just-2-beats-per-minute\">Blue whales\u2019 heart rate can drop to just 2 beats per minute<\/a><\/li>\n<\/ul> <\/body><\/html>\n<hr class=\"no-tts wp-block-separator\"\/>","protected":false},"excerpt":{"rendered":"By Noa Leach Published: Wednesday, 02 August 2023 at 15:00 PM This bizarre four-legged whale is the new heaviest animal of all time If you\u2019re thinking dinosaurs, think again. Scientists have revealed the heaviest animal to ever have existed, and it\u2019s a whale. The ancient species of whale, known as Perucetus colossus, is approximately 39 […]<\/p>\n","protected":false},"author":24,"featured_media":31537,"template":"","categories":[1],"acf":{"readingTimeMinutes":"3"},"uagb_featured_image_src":{"full":["https:\/\/c01.purpledshub.com\/uploads\/sites\/42\/2023\/08\/this-bizarre-four-legged-whale-is-the-new-heaviest-animal-of-all-time.jpg",1200,800,false],"thumbnail":["https:\/\/c01.purpledshub.com\/uploads\/sites\/42\/2023\/08\/this-bizarre-four-legged-whale-is-the-new-heaviest-animal-of-all-time-150x150.jpg",150,150,true],"medium":["https:\/\/c01.purpledshub.com\/uploads\/sites\/42\/2023\/08\/this-bizarre-four-legged-whale-is-the-new-heaviest-animal-of-all-time-300x200.jpg",300,200,true],"medium_large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/42\/2023\/08\/this-bizarre-four-legged-whale-is-the-new-heaviest-animal-of-all-time-768x512.jpg",768,512,true],"large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/42\/2023\/08\/this-bizarre-four-legged-whale-is-the-new-heaviest-animal-of-all-time-1024x683.jpg",800,534,true],"1536x1536":["https:\/\/c01.purpledshub.com\/uploads\/sites\/42\/2023\/08\/this-bizarre-four-legged-whale-is-the-new-heaviest-animal-of-all-time.jpg",1200,800,false],"2048x2048":["https:\/\/c01.purpledshub.com\/uploads\/sites\/42\/2023\/08\/this-bizarre-four-legged-whale-is-the-new-heaviest-animal-of-all-time.jpg",1200,800,false]},"uagb_author_info":{"display_name":"importmanagerhub@sprylab.com","author_link":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/author\/importmanagerhubsprylab-com\/"},"uagb_comment_info":0,"uagb_excerpt":"By Noa Leach Published: Wednesday, 02 August 2023 at 15:00 PM This bizarre four-legged whale is the new heaviest animal of all time If you\u2019re thinking dinosaurs, think again. Scientists have revealed the heaviest animal to ever have existed, and it\u2019s a whale. The ancient species of whale, known as Perucetus colossus, is approximately 39…","_links":{"self":[{"href":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/wp-json\/wp\/v2\/rss_feed\/31536"}],"collection":[{"href":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/wp-json\/wp\/v2\/rss_feed"}],"about":[{"href":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/wp-json\/wp\/v2\/types\/rss_feed"}],"author":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/wp-json\/wp\/v2\/users\/24"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/wp-json\/wp\/v2\/media\/31537"}],"wp:attachment":[{"href":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/wp-json\/wp\/v2\/media?parent=31536"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/wp-json\/wp\/v2\/categories?post=31536"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}