It looks like this is a web page, not a feed. I looked for a feed associated with this page, but couldn't find one. Please enter the address of your feed to validate.

Source: https://mit-edu-5470923168-gov.caltech-edu.pp.ua/post/009263858661

  1. <!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="390"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "mit-edu-5470923168-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '91009214a8f5065d',cH: 'sMp9AqdOuJlB4qQ5w5LOfR0Uj8hsyvHoJd.SVAAXaC4-1739237394-1.2.1.1-jqbLLbqUE5x4f37_N1_w6GoIXJ2tDk56ESQD6QHniRCpp.QSuZ61IarW5J5SMFyM',cUPMDTk: "\/post\/009263858661?__cf_chl_tk=XBV.P0t1G3aye51sqrtHL0PGBJUH54Giu2f9FWgOXTY-1739237394-1.0.1.1-Aip1apBM1uCIXGs8MALV2K3ae0EuJ9mFVaUNY_o4nSY",cFPWv: 'g',cITimeS: '1739237394',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/009263858661?__cf_chl_f_tk=XBV.P0t1G3aye51sqrtHL0PGBJUH54Giu2f9FWgOXTY-1739237394-1.0.1.1-Aip1apBM1uCIXGs8MALV2K3ae0EuJ9mFVaUNY_o4nSY",md: "pXfl1yziNP41e7QKMz8Xh6PRlz8jBdb0x9YnfZ7MOzY-1739237394-1.2.1.1-A0MNDHn6KZ_bm80k21RF31NVe_sXC6yTXzhPtc1f5dXFh02poN2RKIcE.0Fhesks803IbvIC0Y3a27F_gK54IwPk.qVW55TtuQPoBAxxF8pK2gf28Yd_HEeDYbO79ZrOSSFhUHEhBSCQwG6uhYu1lSXnV7Nh1lTFEckzDeTcH9nSSquJ21Ou9AtTMDdyZVDBgvVebwZjmeGUzNZihC6Nl9gn_48gHNIaUYK.BB2ELOQbf6ViDO2LqXEZKqH1CyR229fhk5KmIblEZ_3_LeAvli6841UChXnU3pNC_3kIp_X03MHXiiVR2n1QSAoUNIEI2rzVSbW.D63I_CMrc3ukvOfwj6EC3I94crYbrO9c2qJHpAVZixXT9A.GVaa6kc2bIPdya2vS6GfWMmIEG_hdUb6RThZs4WRNPOuZGWS0XUhBXb9vRHqTWabMSBX2.66ILf2ON.hkfMjxv9S0l1oMGvUlcNEE28WwTGFUtbOCe_bLcsLFFl1cv.Gk1PK.m9zHaBAcpopHLPCoEouNj8kEgti8g3Q3MJHxq7VwmFoBGmkKYahxUo2ZlaIdL9_xt_yyj65DencwklK9jRjYaWelY7RU6j4FomS0zLGu3iTwnUbaE0Qr3w8X2eLS5Qy8pzv2hReVMoqLaglP8Kz1.DYQFygHr8i2ndm6MFRSTSBB.EjM9_bZ6n87eDPN6a7GU2VtOO0j4mbeIRycgLYTR8xq1YNJqUt7V9AL7.eyleWBahqxmE7kw7jVEZA5UoXH4S61w5peFFUTaUzYvebiVmwl.PgwIoHpG4nfJmIu2rTUPmEO0FSGE5.S2TmdqkeAMpPoo1tFUX4oIFc0ZZdUhD_2sxIjVmUChhMRsbBYapo.TMYqCrnYtgas0EddPZ4M6Ez9cRc_Wg9tBRBczuwF4Il2pUj2pqfSQ3TBCUma0j81wJOq6WHUAU_9jmZ1sNLRGB86bGhljYf9zzSKXXXoCnG1aGttIfcgo0u8LrAXttGc7XxK1fjC0Fp7Ir8EsEjoh7PjykVrw0Q_kcrdhhObNCwHmVt5X3aZVSVJsD8FhyswGMlU3WWAIz4lhETM1jv4Y5F.tddQ_EvGMrS6de6khQqx0o4s2Pip6o6.qPJ.nu2eT_Qo.IfYD5TiEnqcQTO_ThLto_bSuq86.VsUVTIgfrdWsirwoWJpCptEvcoK9FB_h2XW5uLgHS2eiiwCs0PpsvJeCJRFnaDNqixwl89TtDK4YeZQsOQK6itzqKy61pQdz4M5BUgmYrOyrOjSE_Xmp0ilx1Y5OKri78GVUM0ofYwzunWvV3jFJYwrvavwe4UQja6K7ldEq6kZNYm2TwRyp10Bu9fVzc8lucJ7caPeY9zVYzKUGgKF_fpcXf4QdPYaTslkoTJWAGnYszNuwyhvPkoMPk.g38b9w4rHwNK3Rcub3cRu3eEekslnO.QPFnycPjLs_J1ODEk.KO8ebHon1__fAbEpXi.A35XbGDJWRr4yK9_91yzfAIG9SudWiEWs3Pvk.NDN1662QUOXhGRhusg233_sTeuNw0WTAdXETzTkyvgh0FkvOQauyprgwPzOVE1n1pA4R3Uh5jB6FPR1Ur.Li_wIDJbjzrxratkuqO9bjdksziAelbp3ntZHgTEhckmgz2w6hUoZWAq9iaF0IBBujHANHOp93r_rWnaR9XOaMHf9mL2z.T5uzOQnkx6ZLJvaEJvp07m1WUju1OwJrnOqvPSkwcBwWM0VjyicB8KBr_K_m8EPhSD1HOfmxqBtg68shihcwW7Lz30tMXd7b9khR63ehi1mPe1dH4cbcISdWsQREiDLK_t_IAYTfZbkGZeD5E9eWrIW16B19gHN12N7l8iXZjn_YSFcHSZ0nw1N_plahnBmfnpnqoKiJT.oUH4.zXmeWBm6Vue.zv8L0b9vtaj.lSn4cHuhknS.CA5l.rBu7P_pM9bFrUItyETkGfkg1gERTSSfGEagKCt9dQR7_tITAmmsLK9gMkTgY1x2izkaqFC2FJMYFrjhgy9aDCfq.ErQQRJL9c4Ucv25nuYZ4qIKZpdzP_BVdkUrvHX7lXqkoVKQofKeTjDa8zWloE1Oi75dhQIc7SjVQ3kpurgZHb9XPfKrIL8EQjeoC6g1_aclc4VcHP99NpQkkSHbngCB8KSFynaL8h0pBdBPAytXYFyLBByuwi0P33e6x4yqBk.fNluuNYYdq5aLMBW_lhIETbU7UsoeknfnPED8XOAu4SHJgY8Ov4IItn.AvBxEaQ",mdrd: "Ic4H8H7ZdyRn7gE.C0wAp_dfepJxqblXewWPQiJ9wxg-1739237394-1.2.1.1-AL62YP2Dd6xpTR3V4k8KZT_pqhPxF0qLn.CgJSFeClcoT29q4E4EkFRStd_hiM90tS.Ys1SOse6lbQMvWwkY1txkxxyLw.Jy9w2CAxFDo3MoQ.zGC6DOalBhpedZmfs9LEbYHY84eJQb35cwVwOpFnXbuecGpduRO5ednXqpV.P3Km5kjHkVHHxx3GQ3s_vDl9epBkErySaHd6DG6Q0AzyOaOpS4_bDeOIMy3Q4VA0BR6pY2MQHs0JBNznH7XQAzTFpX8wcZsCoFiwcYqGGu3h0fMjni.xeNv2d5AiFmag3rf6IjT5EHRHGbpZEP4UMmR3xqAnWt8ykuY5.yN8s0RppHFfXmgbIa7L19ujE1DK8gLvcFv0a_2nrQXyqXmf6CLiwNQwG4Skc2xBpauVh7NAEQf0MLzPUBoqbG1fZYhI6zvw_ODHSi75mXbhOdGYVEXtcHx_DD8.mLpWewVtPRKP01FqCaaynrGfNB.BXQP9tgHs8NvI0UEq7TrUwovVCy8znsn9VeAi.t6gB_F1cb2VD6DgeQABbiu4dHcGuVa9VjBragLEO0XTMCsQUK.k_RlWIRqirMMca7GXUMSySP6VXKjh1KG_IXF_SbzjR.H1VRo.an7Sb71Er9aUEgrzLQOk5CsyCjJg5UlU0R0Hv0tQmlOUX72fVAE8idunBmBqD3IvgTyCb9TAlOOC8UKF6K.QX33DMxrH5gSH4t0ubfTErlz8szSFyfhsygnNaapTLZFmYvd7n5qWq0ZoyCLjBwzh7l..Jk8RtiGb0zWuzb90q2ksYCa_8e5zTmCAFe1i5Rip0qVDvS3ufR2VuYJAz_8aPeZU3rBR1Uq5X.yUZHs63R2qX6BzuTDAiQe9EJCWdPJCCJrZiK1RTJzcHSTVVTrwfyHLm42loll5di3WgL_NtOulEEjuRz.F6JKP..7yPT2k1A.V95VSs.UGNazp1a.7zDTdD4nCElFEHgrfKiuXzXr6aTvFz0Kthu.yB4_Myx6YI30.6o888KkNwcpH73sdvKS8.otad8CR_Q4TZrymCDURkCBmgKOU7mSk66ToIV4QUMdrG3xOsRXu5V3mUvLXB0HxNlW4SAzLxmUQ6y9gkIxejyMWkJPx3R2zFu.n20xL7SZY3_rEUuDzF1Z8xmX9ZJSS62a3KNGyrLJSZd0jdlplO5tTqiRlgD7T5dHPjmY1kLKpcFrWuZwywMbFOQggOs3P_nvUMfMONhfNCAd_mW.3fO1cYo2OgLmEY64VX6wgikWHW2oZiV9KCRghRc8AP0HECuzqxpvpa0asnSWt5XSzb3G4CKnBsx0YF9pSG84HZ6i07mt18XYDxP3oOMNOQaFlIbyhvjrWOLCFuQ9ESCMSb8pIzZtBb.YuTQBNqP0qSURHK7G5KBGI8D8ICs6xx7Vdg3USGge8j1D0is1QUmnc49z3rZGoW3ODbS9rcWSlPHZTLig2QE216pc9feJUWqyN52Gg19Gsyk6C3M1Z9pPQnvgnQ5weLz0UtikzRXse0U0C_VRSfmuS8fKn5oWHVVmJfmMYIcAxJ6_ocF3UNPI2Xn4ijCVynWslpPerlYhqO0Ap7PfoK9nUHG7B1.vFVG56hryvQjg9vI910_kkD8SFv2xG.CdNnLjTp1_Js02B_OebOQfsnqJgjLXIYhRhvn7pdRxWQUarBT1kz3VoWOcIx61CxlzANxr5Fg85APIF0X4QBjTQlHLhZ3vRIaW_aUx8jLjiH_cwtZ0svWsvzRseGDSLR0LlydSXH0HFfuesX.O6aIuxLyZP6f4JZRSKndQg5buNYNbM5TQ.Om4EzjkEkPf9a4RL.eS06LH4ECOnD1jvENsMut_RdJjNxreMJrx5SjI4ckrIwjfdi81A"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91009214a8f5065d';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/post\/009263858661?__cf_chl_rt_tk=XBV.P0t1G3aye51sqrtHL0PGBJUH54Giu2f9FWgOXTY-1739237394-1.0.1.1-Aip1apBM1uCIXGs8MALV2K3ae0EuJ9mFVaUNY_o4nSY" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>
Copyright © 2002-9 Sam Ruby, Mark Pilgrim, Joseph Walton, and Phil Ringnalda