{"id":310908,"date":"2026-07-04T05:37:39","date_gmt":"2026-07-04T05:37:39","guid":{"rendered":"http:\/\/6a45b1476fe7d8df3dae811e"},"modified":"2026-07-04T05:37:39","modified_gmt":"2026-07-04T05:37:39","slug":"por-fin-sabemos-por-que-la-popo-tiene-forma-de-espiral","status":"publish","type":"post","link":"https:\/\/sarmiento24h.com\/?p=310908","title":{"rendered":"Por fin sabemos por qu\u00e9 la pop\u00f3 tiene forma de espiral"},"content":{"rendered":"<p>\u00bfAlguna vez te has preguntado por qu\u00e9 la forma de la pop\u00f3 es similar a la de un cono espiral Despu\u00e9s de todo, no todos los animales lo hacen as\u00ed. Aunque parezca incre\u00edble, la morfolog\u00eda de los excrementos ha fascinado durante mucho tiempo a los naturalistas (y a otros), y hoy un equipo de f\u00edsicos finalmente ha revelado algunos de sus secretos.<\/p>\n<p>Uno de los primeros en mostrar un inter\u00e9s real y profundo por la geometr\u00eda de las heces en el reino animal fue nada menos que Charles Darwin, quien, tal y como documenta en su ensayo de 1881 titulado <em>The formation of vegetable mould through the action of worms, with observations on their habits<\/em>, qued\u00f3 especialmente fascinado por los excrementos de ciertos gusanos. A diferencia de las heces de muchos mam\u00edferos, las de estos gusanos forman espirales uniformes que definen una torre y no un mont\u00f3n c\u00f3nico.<\/p>\n<p>A pesar de haberse preguntado durante mucho tiempo sobre estas diferencias, Darwin nunca logr\u00f3 comprender el motivo de tanta regularidad geom\u00e9trica. \u00bfY c\u00f3mo podr\u00eda haberlo hecho? Tal y como explican los f\u00edsicos Mehdi Habibi, de la Universidad de Wageningen; Neil M. Ribe, de la Universidad de Par\u00eds-Saclay; y Daniel Bonn, de la Universidad de \u00c1msterdam, en <em>Nature Communications<\/em>, Darwin no ten\u00eda las herramientas de la f\u00edsica moderna para explicar el fen\u00f3meno, en concreto las leyes de la teor\u00eda del enrollamiento de cuerdas el\u00e1sticas, un modelo matem\u00e1tico que describe c\u00f3mo los materiales filamentosos se enrollan sobre una superficie.<\/p>\n<h2>\u00bfCono o torre? Es una cuesti\u00f3n de f\u00edsica<\/h2>\n<p>En su <a href=\"https:\/\/www.nature.com\/articles\/s41467-026-72566-7\" target=\"_blank\">estudio<\/a>, los expertos explican que las diferentes formas de los excrementos son el resultado de inestabilidades mec\u00e1nicas pasivas que ocurren cuando un material blando y el\u00e1stico es expulsado a trav\u00e9s de una abertura. <strong>El factor determinante para la forma del mont\u00f3n de excremento es la <a href=\"https:\/\/es.wired.com\/articulos\/gravedad-extrema-espaguetizacion-y-tiempo-infinito-que-pasaria-si-cayeramos-en-un-agujero-negro\">fuerza de la gravedad<\/a>. Para los animales que defecan hacia abajo, y por lo tanto siguen la direcci\u00f3n de la gravedad, las heces se acumulan en el suelo, formando espirales cuyo radio disminuye con la distancia que caen.<\/strong> Por lo tanto, cada espiral sucesiva ser\u00e1 m\u00e1s peque\u00f1a que la anterior, y ese estrechamiento continuo es el que da lugar a la caracter\u00edstica forma c\u00f3nica del mont\u00f3n, la misma silueta inconfundible del <em>emoji<\/em> de pop\u00f3.<\/p>\n<p>Sin embargo, algunos gusanos desaf\u00edan la gravedad. Por ejemplo, <em>Arenicola marina<\/em> vive en t\u00faneles en forma de U excavados en la arena de las zonas costeras y tiene la peculiaridad de expulsar sus desechos hacia arriba, empuj\u00e1ndolos fuera de su madriguera en contra de la gravedad. En este escenario \u00abantigravitatorio\u00bb, escriben los investigadores, la distancia de ca\u00edda no disminuye, ya que el material emerge desde abajo y se deposita sobre la superficie. Como resultado, las espiras mantienen el mismo radio independientemente de la altura del mont\u00f3n de desechos, lo que evita que la estructura colapse y obstruya la madriguera.<\/p>\n<p>Los investigadores pusieron a prueba sus modelos matem\u00e1ticos utilizando una amplia variedad de materiales, desde espuma de afeitar hasta espaguetis cocidos. Incluso crearon un an\u00e1logo sint\u00e9tico de las heces de gusano utilizando una pasta de guisantes con las mismas propiedades f\u00edsicas. Los experimentos realizados expulsando esta pasta tanto hacia arriba como hacia abajo confirmaron que la direcci\u00f3n de expulsi\u00f3n siempre produc\u00eda las formas predichas por la teor\u00eda: conos puntiagudos en la parte inferior y cilindros uniformes en la superior. Incluso al variar la velocidad de expulsi\u00f3n, el radio de la espiral se mantuvo constante, lo que confirma que la mec\u00e1nica pasiva, y no el control muscular activo del animal, determina la geometr\u00eda final.<\/p>\n<div class=\"ContentCardEmbedWrapper-hkvhYu kMYDit content-card-embed content-card-embed--stacked\" data-testid=\"ContentCardEmbedWrapper\" readability=\"26.828244274809\">\n<div class=\"ContentCardEmbedImage-bqahne fjmzkP content-card-embed__image\" data-testid=\"ContentCardEmbedImage\"><span class=\"SpanWrapper-kFnjvc eKnjjD responsive-asset\"><picture class=\"ResponsiveImagePicture-jKunQM gjCCFj responsive-image\"><img decoding=\"async\" alt=\"Imagen de collage de astronautas y heces humanas ampliadas.\" loading=\"lazy\" class=\"ResponsiveImageContainer-dkeESL cQPiWi responsive-image__image\" srcset=\"https:\/\/media.es.wired.com\/photos\/667c34e1b0fb25e2e742c1f6\/master\/w_120,c_limit\/WI-0624-03-Human-Waste-On-Moon-1.jpg 120w, https:\/\/media.es.wired.com\/photos\/667c34e1b0fb25e2e742c1f6\/master\/w_240,c_limit\/WI-0624-03-Human-Waste-On-Moon-1.jpg 240w, https:\/\/media.es.wired.com\/photos\/667c34e1b0fb25e2e742c1f6\/master\/w_320,c_limit\/WI-0624-03-Human-Waste-On-Moon-1.jpg 320w, https:\/\/media.es.wired.com\/photos\/667c34e1b0fb25e2e742c1f6\/master\/w_640,c_limit\/WI-0624-03-Human-Waste-On-Moon-1.jpg 640w\" sizes=\"100vw\" src=\"https:\/\/media.es.wired.com\/photos\/667c34e1b0fb25e2e742c1f6\/master\/w_775%2Cc_limit\/WI-0624-03-Human-Waste-On-Moon-1.jpg\"><\/picture><\/span><\/div>\n<div class=\"ContentCardEmbedInfo-buyHWH gWLOee\" readability=\"29.267175572519\">\n<div class=\"BaseText-fEwdHD ContentCardEmbedHed-kDKGDs fUtEc dlHXUJ content-card-embed__hed\" data-testid=\"ContentCardEmbedHed\"><a class=\"BaseLink-haTOKm ContentCardEmbedHedLink-iBZsco gAoKdC hhUFQU content-card-embed__hed-link link\" href=\"https:\/\/es.wired.com\/articulos\/por-que-hacer-popo-en-la-luna-es-tan-complicado\" data-testid=\"ContentCardEmbedHedLink\">Por qu\u00e9 hacer pop\u00f3 en la Luna es tan complicado<\/a><\/div>\n<p>Para que los seres humanos puedan volver a la Luna, las agencias espaciales y los gobiernos tienen que resolver importantes aspectos jur\u00eddicos, \u00e9ticos y pr\u00e1cticos de la gesti\u00f3n de los residuos extraterrestres.<\/p>\n<\/div>\n<\/div>\n<h2>No solo pop\u00f3<\/h2>\n<p>Resolver el enigma de la geometr\u00eda de las heces es m\u00e1s que satisfacer la curiosidad: es prueba de que incluso los aspectos m\u00e1s humildes de la naturaleza ocultan leyes f\u00edsicas universales. <a href=\"https:\/\/es.wired.com\/articulos\/las-heces-de-las-mascotas-empeoran-las-inundaciones-en-la-ciudad-de-mexico\">Las heces<\/a> han demostrado ser un laboratorio ideal para estudiar las inestabilidades de la materia que tambi\u00e9n se producen en otros <a href=\"https:\/\/es.wired.com\/articulos\/como-los-genes-han-aprovechado-la-fisica-para-el-crecimiento-de-los-seres-vivos\">procesos biol\u00f3gicos<\/a>, como el crecimiento de ciertas plantas o la secreci\u00f3n de sustancias blandas liberadas sin tensi\u00f3n activa. Comprender c\u00f3mo los organismos aprovechan los principios de la f\u00edsica para crear estructuras funcionales tambi\u00e9n abre nuevas v\u00edas en la biomec\u00e1nica y <a href=\"https:\/\/es.wired.com\/articulos\/es-la-evolucion-capaz-de-evolucionar-un-modelo-computacional-explora-la-enigmatica-hipotesis\">la biolog\u00eda evolutiva.<\/a><\/p>\n<p><em>Art\u00edculo originalmente publicado en<\/em> <a href=\"https:\/\/www.wired.it\/article\/fisica-moderna-svela-darwin-non-riusci-capire-perche-cacca-ha-forma-a-cono-emoji\/\">WIRED Italia.<\/a> <em>Adaptado por Alondra Flores.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00bfAlguna vez te has preguntado por qu\u00e9&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":310909,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[46],"tags":[],"class_list":["post-310908","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tecnologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - 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