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-7248036519-gov.caltech-edu.pp.ua/post/7248036519

  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-7248036519-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910c1bd88c13e5fe',cH: 'jZbmbS7xom9nOIuZmGEuCFhntPqwDAwh8EQQ628_rTE-1739358380-1.2.1.1-PbpXPrwnYV27fFug8.zYlcUFoe8frNff51gvVgZqv7k8ZoZSDDB9gbssSuTuKccd',cUPMDTk: "\/post\/7248036519?__cf_chl_tk=zYcV0i6vF5dA6bGh.ACNVezk4uVUzL2fYLrkImdibiM-1739358380-1.0.1.1-zFejYTpJ73DLN2gpXmvEm86f4hdZp1fGcRm4XoMfu4M",cFPWv: 'g',cITimeS: '1739358380',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/7248036519?__cf_chl_f_tk=zYcV0i6vF5dA6bGh.ACNVezk4uVUzL2fYLrkImdibiM-1739358380-1.0.1.1-zFejYTpJ73DLN2gpXmvEm86f4hdZp1fGcRm4XoMfu4M",md: "bIyDmisJg5rn.kzy.ZLaYNwpXpqk3V8Ir9iHk1IALYU-1739358380-1.2.1.1-VLTzXPEE9S2CtwJbTe47rFPXbuXbgmIFhe_4derWA8qilu_pGXO2o5Mie42N.x5KxcSmSFNx5CuKvLOkmZU4GwSBOFt4NwxgmfrqFnPWsPm1tGRTrA51ZGbmDZMXDNPhJW_JVssFKWoPFp.QHL9HNZG3wkUaGXnFKs.1PUwxRZWufzbKP3AJ1qZERd5.WRHt93bjhhjMJzN5ISf.EsH7mxuKqycIatuxHmnHZYqTTrdFuZoVwpw2szuNp3HaJZN5UnaPhS_7CwnmZuC90lkVt2QsYs514XTzuHWOryqi.nCNhDXqMBcKQ8wuI7VmIA0iX8GB6PGdmqvS05IBI77p0AF_OTHI4MV3U8.xkWa253bnhloCBpeIXXzUUTMnzKJciN.Yg.AwR1hhSbthcOUzD.ZzOszqq.kMwWOeEDcwmmPqCGrfMntR6OFj3cF8_mywJsFvpK4PidY3Gl3xqa8G1wtIDgBarBQEo1oB0FObglKKgkO7vn5GKBZXm0pKDp6AUD4sS5CXYY_LTJMeezx6UDpCkjc1.sLA648RkKjjmWFiekXRZAEpVz8cq850LvNKAzmu3d_0GZQWHBTu9KjeNu1x63BsmGfmnrE4CHBgmri9jmCZgtvJeWG.Ht3eUoo3sirL60MtYxY4hVc_yxwWoW0Cgb7nRk3ujlVst724TXShGjIRW0gSD0tNFMyWAC8apg1RS855Caw90lCXYIkdcNkmRo2SH.F8Yo7UqcvP_kUkVJxEs_duQGENgD4u7R1k2F..8Vj_PhH5XaECTRwn7UuJLzeEGLjm8kTv33E6f01yGEI78G8ZCYDpajeH.IQ0ADbuP2xQy882oll542poaFQ2mcjhfIx7nZXrxw7j4BYd._vYh836CJC33CnKMNfyOyZpquHBT6w_neWk1Pf8GB.EGcfQ.c4GidOb6Dlc_q8f472qaIHZ49aplGHgMoXurYZII.TQKG1aKlDGBciCE_bzxjbnh1InFyW1fUa5fTmHW7DJ0fxhsdjo8tA3S0tGFM2r5GHSv5k4jSSb9VK5QVP0Gs862X5P2zhSdOpRwXFJcKZIWroC16lkR_2380HMwp3i9yOlvG5O5ie6AzasVqygZoGOszbXPShru2teR_PZBbktcDJkClVlea4inaj455IOtXflYG0i.XaE2poRKlRCFROn61zDmpS6MbWxp8aWOf7Z85B6lJYhFfQVgq1YYI1xIG30c9tfmFfXt1TSEc.NUV5UCjteS5CZQvGk6Dh179ezSGSy9OxGx0HyAmmhWMhC9eWIeHYzVkof2dh9NufUPPMPRC36yskI0Nw3M9alLA2QApVstpjbKWcoNMgvLh.ZZ3Y8xUCW8Gpi0S2BxgJ.QPSh0MgqeV_nM75iqg1N6cqD6S0ZxUGIazA0HwbpYOnC6L1we1ma52Ex.zclMJQYg4bmL4vmYSh6D4t.pN4SGIKnbmxiouNbwapyHzQAk2BIReJuAOg2Gq2om3NuRRmyYF0AUrO3NOd4IJCBUzA0obem46omZED_NAulpYDPjFk4yHxakmHcj4fiHcl.u0jxfGOjZQb00kAcPMfm0fVuuVnL2qwqNjWbxLfFnsKAKacnU8OKgjVJZnnk0BYk78fqTbzyhxUCpUW6toqPWkQydONfZJgE3BjnmiwFhvdaNC0Qf7Zw0witFU_CaYTz4ksayyPy9OIb57Igx9iepRj5KsJ2xP_dGvME49ZlIUAHR1e1pQSnroezmw3lvU8MPP26.O9PYvLWJl.FUoZKDBZkridVEXjwYST4kEtg.W3B.fICfhhUy5EWE2M6hZFE69du_veheYTQCGrcC8ANX7Enn6RHRqUfnEsKqHK_Mln8XJJXx98Sxd.aEb8FbVaJU6xcvHNvmONBexf3KL.bsrg1CncBMrzMVJnMsCDBhGVnnmuQuTc6lGUKR5p4fZ.j7Mi0QLHwsiKTP.o0R9YloEDxu4VA.Av3lJcGvo5K.Z3Qy2lseEfAhBERHxvduAwHgn8PwHUqRk6hxeMTBv8m6uWBO5XACENCsRvY43uzkqlraqGmAppLVz6k5Od8x7ikp8TasuBE1XwFvXzhNgMdMvr7zx_KgD3IJfln1tvogZgzZOVNhnibuSsB0xoSZhxI8b3qFVJf3cjdROR4w_Zy0BvMy9.hjhKeVnZFt8aKYYgthwtTFBeC9zq.IljA_f8D92_DHFeFOzCW9l3ANfhqlL8qi9z2YR9RqYpeq8mmeB_JULuhr4J2BZoyPcBSkN_VUQ",mdrd: "CfUkFZyeBOl3p3S1RLu1uKEkG4cRmXIMe3mbQ4i2Lgg-1739358380-1.2.1.1-1nqc_LD0gBde3Dtey8MSsXMHYAmTpm5o4Elbr_OOYwR2pXVLXul8GNaM2HuNpM26JRA_I37R.qnKV_eDe0_2sj6CiL7Myr5j4N9E9VK333gTIE_3skyp7a.vDBltRPtvm7WGQUyGt_V7Ydrho74AG6bWhHn0M6n61mYnIC16kA751kEcy6iRMJi5w.UN9FPoK8v.GBHxMWl3txvYb7HG4t1mnF6xnW0Qu5KUNcVU0r7WBdnbNnE.zH5dwsl.cXCnUjnwuwk1DOgS7EWSwa.dmIHy1LMRg1X8QI5rV_nUVsUuo5lQw6WdvL62p0aJmpxjZELBKqun_gf6VSrGGaNZkkWKTcJ5BcXEnjPW3MoWJ2bwIrIDQFhPKgrS6aXX8ORf4ak2EWpIfCHXjqICD.2brU9.j8k2unDZj3iGQl4tRwxR6Sk6gYjs4cmubRqp5D2uZxr34AwM0E3jawL9gD966b46WLqiXmALjo_ec.at1LPlef5ZMS3BI0LlQjipEaZwvG6qrhlBwEcUjixiLtwrEiDWzZQM72i2HEVqn0603iRJHGLP6MflbzX33vIJbBdhqCOctdutzQNpjpNxqAHkVg1nrXEuw2XLDoHWA4B2zzPTRELYtXuV1CSWq8wGA86QLp4kosn4dC1phW5BsUA0vMXAlWPv1l1UxlGlcFnpmm5E.scWPYYF9IQawU3bz2Xs_ot9nGLz4roSEefk_iBs8kX9jiBZkHEg8EFJqpocCS2AFHQngsp2rZlHaD7xPehS2X88Hbd5QgrM0d3iIR6RdkjTVEzU1VcE5lx3tuzyyldzCt30XdS1q2.Lpfy.03EP4JhygigcZpug8BgJD5l4xQDYC0x6Nkh4a5oVzDy9X_r6kfTZvDblnvb9s8QDB9PCrZKNyrYiJ5C21sJ7BdNAVL9EEoka3vNunRH7a7SWfQPCNRMOFClbUptrw884kitKo80qj2BqMXcIYGm6Rk87D6X2MUc04L_gozhofZGlyDgcru.d7ea9AECrSOSjE_zSl7AlaU8uNDCH_gXVQ1t2gmCe9VrUgiQETOiJ286iFrJLpIgs1dcLf27tM1Sllx8roEeEwNFNsYX3Dc8KKlzFbyHl.aQvKf3FChODDLfihIDbCqV_AQOSZrn98rGpo4T2CLqFKrcsY0m01XSsQ7oPWrwD87GyNGwSs9wg51k8TM7jpPfBWX4HAGrYwkmeny4.Qrz5rRh2yZe.BIl0T.iEuViPmYgBXNntU.5Cgofyhy88bm0izgih2c4xu6eLLkmxzgo7qKn5EdrA.MGwbHa1JAbnt6gLU5EkN7oigqr7nqlB.FowiglCmX6P.pGP58CRLwGByxLAGOGqhk87lJFE521DkB3dBxn_F_TXHYA5RW.z0TpmasTT5CWlwfkEXOCDVb_61KX_MUSuOBamxuV0iceLEoZqvO2HRw1OI84XkRQZKJvP6xSMyUNsA3osLXikEfe6zuyWrM1ixHpgj762fkl9GH5VePjBssdyAwQJjtAA3hEwK5quYPaqJQYv1I7k2iGpWy1PcooWpeIoQpuJGlPvjcJStoQF6LgCW7FS.HDQNFRYA0dsih7rj1dMKnwkGqhp_OEcK72oUd.V16EGK5SUpy0DZgd.DUdTVWSZ47R1hhrqirtUtqH8GnMThho2nST5ZUSNiCK.gZDwNQh_aqmEn8uqRwdH0PjEBRn6KYhuv06dGjpgfb.7pKrUU3VPnazHiZZaqoiwVGwL72_fYcVwnUoF.VYbzSBj0SrMpZ9C.s0se1..wwokiKWYX1myurl7odF72bWpei.7aYmHzNh_fTN18NnwzHQb.ptmMdAll1GqXZIV8EFxohTwZGn3cRnu4Ic82dXfqmMJPdPveA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=910c1bd88c13e5fe';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\/7248036519?__cf_chl_rt_tk=zYcV0i6vF5dA6bGh.ACNVezk4uVUzL2fYLrkImdibiM-1739358380-1.0.1.1-zFejYTpJ73DLN2gpXmvEm86f4hdZp1fGcRm4XoMfu4M" + 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