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-2594806317-gov.caltech-edu.pp.ua/post/285518656703

  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-2594806317-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ffa998dcf72427',cH: 'whqixnQTtHVfMFDDXs6ngdYxLOXSfNJvZheHXrwWJ8M-1739227872-1.2.1.1-ft5P9173wTYf4FlGUhrTO1p5qV9fb4IdV1N7jNNVG904pcDPgsSU4PRlaIem1p2v',cUPMDTk: "\/post\/285518656703?__cf_chl_tk=fZNb93iL1yXPyr1Q3bods8NIBAl8vZNOugBc4ylAMKk-1739227872-1.0.1.1-o5tdkyfjw0woDscEWJR.10lYFucG8bGFkMfn3oeC4Ec",cFPWv: 'g',cITimeS: '1739227872',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/285518656703?__cf_chl_f_tk=fZNb93iL1yXPyr1Q3bods8NIBAl8vZNOugBc4ylAMKk-1739227872-1.0.1.1-o5tdkyfjw0woDscEWJR.10lYFucG8bGFkMfn3oeC4Ec",md: "p9VmLjtyTDLFpXikSRFF4paZ4tjZBX.UuENBF1E9Ey4-1739227872-1.2.1.1-MGMpJ_TFkXlu1MWWDypxGolh1nE2m9vo02BwnMWBV5zqbcwmLtCPm5YIeBSlob0unjZVk6H7ogI3OCsoJ0dFv1DJp4tQ7yMXzJe3PkS3BvquzyxqHj1UnznyDrfj9ncT6nb06WxqRRBhaUNdtBi_1NyEO30Vg5Phmat0XkG.BhiodxkgpGmIWL2.vOsS4eRfb9JR9jZqJN9pdRDQD4ajdtsLBIjt3kG5OUDl2jSL86dkh9sy0EA0DOzhQs3ee1xTn6B7M2g3Lkqozfbk14sVJl63szmzPEAx9rgIkBt1dZnxY3Oner0ApPODmFrtiv2lDGu6Ka1HdJE2z3_GsB1SkKFjfsfruPl6nmad1p31w_bJHm2yuTzVg9HOrMNsn4fMK0yELbCWMnbWr4Ul2dMC4x6tfB7_h9T8ilUKzgVAL0K6qfihpIE2z57CuYizZSNnsXgkQttcKx.GEwkHI11HoI2KuXs5yyTU11H7wV7o.X7y97ze12R1mPEIANWccJ1oYfUX_AtPEvK1HcuxpAqTwy0iNdo0DXwvQibBVQgBnhEkivmdtPtQ998NaZu7pacnC9w5jUaMf7Qfima.5FIMByJmptfe7ijdMrmoCNl_37Rqs_ztP81uFVWJXXrxoS1Sc8DGjCfVumuZdeVHgrdionosk7iCcUelcQnXEFjT62mNPqBx6CwOuJCUm5xBiXSphhx_ikBW.BKx56Bc5R0.C5HsKHx8aAp3D.EFMrwu6_SgQOlyrmT0ZyIW7KqFPQnA6o3FDKqAMec9OQ7iW9Jl.K4GCg76K0aqUaGW5laHCbvHspmugdfv7zbT9Xt7tSVy32yXY7TaTm_5mF13.D0W2fs.k0OAj77TB6WcW_Xm3EZvq869tskitimGWZND0VQZ53RjHKJU8fUQORDFwaUi9pzSnqJRlhJ2az7KPSflEqzDkoQZoC3opHgKkWXlskHX1CV4qN_aIchqe6xWILOKLx6iKD8b2W_kDgrQ5JtBlz9HgOkWtNjLxwn0cLv49xav_lm5DY.DHqu9cancsjlYKtldJ8vqHkYxyOTR1HzoBc0aQg3L7uB.Z.O4LCW2L713iYmL3HeXXB3kND4eTGOvQKMPzgErtikkkimxDiOcZVxECblNHp0eWcmpHJc9melcRavRRpV3xtTHnox7r_Jr5AxlSYBc2BHEF0XKWAcNJF7P_PsFywuJb4e_AVzUnPot48wxMMkMieAIZu4B3sBOTpo0AZ6CczRTOySHbTubCf3Il2wqkfTezA6mdwvlLACCPTQ.2VhJFN7SqykB53xrrKO32hgrjku0FBqhajoVMixjmguaUohhFpPfEh4QyNJxdtlWfpWB48CemESxo3bv8WYbosrdGf_Dn6wfY7ayFRc.8zsgTb9i6_XQoscny5xnrTJq0mEGxWXXGWivRZBS7SOXFCnSvHY7nYAy6zTtrPo4obDqsS82ovhl2HWUHO_KU_PmQHHj6DQj3AxNvsPukH8D4hAZRnNe5jtndSlBdsX20tumRWeF73aESCB4sBOQOhA.zxN6i3qzCLLD3uq26z4AsiTOX_D5yG9uGTUrSol9NHSmKEJehLrPGdrVI9eVsvdb1CdpdJ50vOvxmLsTEHSkbc95pujc2wOQaXJ8i53ZJkng.hgtMn1bacVi2ls6F4Di3Xro2KJskRRlB8hLZ6o03h7BK44W2oWob.zWmX1NLjOnsVInWfUeqWl7tBoI9tDR7mYL6nu.ZRDiwztomxtKC82iLW8ObB3nhL0vpMS5NjxAfdGL_P4388wP14jFYWqi450IcJxarPxz9xJgZt5NMkYCCbjg4MEd2r0LdpsDrcQRargNZNTcRnQozMB32mxUCORbauJNpBhY12Dvd2Sm_2tisuOVYJ2TrG.Qp9w6b8l5GwL1amvIG9RylS.0PIfRsADCtftzoy8qiLsLfek16tZTeWzevrWtBrZfMt9MrAuSnlB0TUYtYV3ITRnboI03lsyNUrf0urLGcmTE2RdHkiPvF.53b_QyKaDEs3FFkSzGTzrGxFjz28Av56oMc5EvkgeNP.SSSH_gaheNdhcnKfUrakjrX8kj8OJ1.RItimOMwBCqYm2rXT28BLZPiz.gpGJpH.ug0YDEvsKgNz9Dp30jGAc_PQ6ZrgTGJlQPjtMtRwT18gLrHh4l3LgAbcQ6hHvILohqka8TgGVSt06XTV2JJLg5z8dSk6OzQ7vn4DBTk6C88cFzym47LF5AmBkCLhrymkFD9gH6Ik3_lQ",mdrd: "hhE_TvITAxLggCOyO8Ypxi5W7NuXlhZCUYguxuvIaPA-1739227872-1.2.1.1-q5UmVfkrX1AQQvVQRhzs1p.nOVhHP_Xc9VuPeVzQgh5DaXGsiLkgu8f0UGL6U3xAA_ISI7foqV2x2VPi666DVoQJuENysFnQdfn8dCMnbUZb0YGZDkWE9Yt6h6Pe6IdM.2UHsByXN1t80Wtu3dvyDeiKCMJgI4VH9MzNicbShiMFujER5juaUdcU3SnWgDbzn5cTGV1y9Yvikm5accJqlEvzZumGNHlBWLe9kqpcy1VDHiAzKmmtFFUqLDUP3SlRpaWabPmMj77lnoB0.1hwVS.ftb84nBIug1fauiHXz5LyHkMuAc9odFY0_qdF07G6hN5BieRhNWcjnQ6jaymucC8Irv57qNsHv3kvSZA6TsPR4vbQr829txuE8Z2H_baf8iondkzm7ku1lILt3OE7Sz1.y5chZ7CUQ3VYvfcji0VUqGI3ScersB33dnKfO4aG.ogmnVnG3QNnDx8_w096aUHogv74keSsJCdcX.RdYvIzyEGwqxZ0cTi2zFxCsFvqAA5bfwjZeqNYnf674ERz9cl1x7R4k_dHP3FTsXm07dMuEzy7qBq0ThQY5gDKmrtgLe62NB3DbUecEOHZTu3ocO5aPcVR_IIyxuGSGHdiFht4c.dufPif.o6mCdlH3sukI24oQdnKcI.sR9WhPNVKdFUC7uBG4L_RjReYoIqzAycqpK0aNljMljwrwn5A88o85GDot3RNIDVceL6n5EiRze4PTHM2RIc8PDlLYbgPu2ifyho_JHZw9mtOB4wlikzld5FHlAm96OBttFsRe51mFCBzu.ylF7MUCzgg7WDSHrqUGq_QuVli0jzltTdRJWzs0N0V.IMaVd71hQOIDyhlrojxcDlGHcEd6Q9OjrUxA0dHzW4wvGgZFIl1Ie0h44a8JSCJL9nkigPFT3KHVl82BqN.avD8zRWXuD4IVviYwVPbg7R5H050B9al3V1cQxVAZIlgpAzEUTyOaGG0Mc3U57jpWDjuTSfpjhJeCUiVvtspDIQbtAsbpJ6EUJvf3zTyRI2MBTgyQwvwAEixGXWcj90ZDtPJQEZmZmwOXiyQLbADQPclcAmtEx_EBIfw.5EQ4Xsgvcj4DZWojL5Uyry9UC1zj.ErIa3BB6OpWq8rfDwiKbQ2nLGyRO3d22Aj853Knc8ZW0NYTbnrCvN_eknpuRT9iyl8_1Aw4.yLpOG7sAFdtyOXKeRdP6nxRW50K8ZvPXuUMjW.8TPjK27v_yh6QHsQWO_xu83SalyZbnt9ytf5tOfxJ86itTjamYBZv4VPThjGwRl7QM0xG3WAb95JfHaAEIEdnsVCaa66_PABJ6eR2YYqGenFy65wbFirRyTHnmdopaouC88hI91wfRkumoPRClmUGQW5zhaaODnha2EFiiFkdKU8xgEq.relbmEniF36vEvpAQcFeXl7AppwkeFRs.MkPm5MpKasNJc33TI6_lTh17eNWcG84b36aiY6CcPT8zd8MRxoRheh62JICiWGZ2Cr01PMYvFzx1Wjf8JE.GWfdeIWhvkfYQipLa3GleF98BZtPKYniZ3FzpwBwmzifsKft45KGhPHi2MGqj.lASd9hX1riqmyFB_w8hyzyBL4fXl1xBrEsWX3kfPvs8wGczWPVGgaDEUY8hmzjGkErRQ7xHN8Ei077creEtNQ2BGgC6fltgv_75EtoperiRvGiJFXI4Vo7rlQrCva1ghC2x7YAwF9M0i_id1VrmfdSiGku11QkDVUs6eqAQdtKJETTENeV_rXlA4iftZIkfDWCEFdggaci77WUsRXt5rv.PFfhGimQSpla0HYK_zJb6Z.ji1a92R_84YRKd.OxYs"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ffa998dcf72427';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\/285518656703?__cf_chl_rt_tk=fZNb93iL1yXPyr1Q3bods8NIBAl8vZNOugBc4ylAMKk-1739227872-1.0.1.1-o5tdkyfjw0woDscEWJR.10lYFucG8bGFkMfn3oeC4Ec" + 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