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-8032456197-gov.caltech-edu.pp.ua/post/620773309019

  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,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);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-8032456197-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ff43b0cdfeff0e',cH: '926GlR7xHDGtzGC7zaBCvkHaIwUl9G_ea1OSRo.Fdqs-1739223698-1.2.1.1-kZ_4cXwXF0NYvNM3orL1J0MV9s2n6_CfDVc5AdyaJ3KsY5XRpb8gSVnLutL.iDBT',cUPMDTk: "\/post\/620773309019?__cf_chl_tk=PaAamIqbWxrtxlTajS9qgGmmzkzhtGHSQPECclOprGQ-1739223698-1.0.1.1-CmJgrc294dWXPYPZTPhNcsD_bSku32Dn3G3xdY1QiwA",cFPWv: 'g',cITimeS: '1739223698',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/620773309019?__cf_chl_f_tk=PaAamIqbWxrtxlTajS9qgGmmzkzhtGHSQPECclOprGQ-1739223698-1.0.1.1-CmJgrc294dWXPYPZTPhNcsD_bSku32Dn3G3xdY1QiwA",md: "15pSNmDv86SkJ1oeZcHFi.AdUrnYUNQ9Oml7NeXFH2U-1739223698-1.2.1.1-I3B5PJkspH..8v_uO_l0C1Odn_sSYHM.6S1uCFCjncHw5wusuW8WEL.3bYjHYh7nQINiTM3xjv6Ezl.QQts7IVyxuKIGnryrXrv_BzPNzq4gRaSt_zBj.kegj5jVMWVLN6rRllNiTS6LYqB_QG4YOtuQSBJEG5I_WSzsaVRvc._KsA8BHfXUcRKNIt9rAj5M8kUx7h.xr.NvZ7S7FpPWRvpfP46SK9Pg2q8TOrgJeFpPxzCsJgDpyVHgGdy8FySs2ayPckF.vFlQS8TlJ2SHevWypdYB1me9nYZwDDBY0PNtWQi420mpbOa34lJiG1Rnax7r3YZJ0axXbo621Zy6iicTWCZ1rEs.WTkNeo9r2N5X3mNGsF4LD7FRmVIrPpruE.dthOFoQr4sykh9u1oCh0n31NeFPhymQMuOSypBtSJY2LrG0RORWR3LIdj3hTcDSYexJYjN985mBv9qL1yzu51AethA77p4IVurjiERtLCBaKCpGFNjx6H4p9r5LWFm.e7tXjg6.ENOsEqQNIleLhk9q9gr_NB8pDP_2E78TVV1sNZT1pEMMB9Dkp.7zEoT55ZP_2VdqL9Q33ZrBmprCkeOYuJ_1gCwkCcvbHba1OpEKj7x1w6v7fJ9U8qaoFQRgaqVvB0fL7BvP_XAXHRL6F7I1zCv23hMRQYvAUaieSl82.bZ4XZhZ7BzK3PamJ9qkvHDt_vFeztxPjTKFmBQ6ut1hK8e0UL40FnRmyF3hIJNJLiG6WvhbCL60lbxoEzjIfxWYTHkNMJVCL7EuySKWgERG7Tvk8Bv2.9FF_jZ6bzfHfDY_Od8zunGf70o80KmLL3qwlannS_xFb_k05KNevl95wscDKPDzctJnvEM0eoQY2e10K7UWX5ZeN97n1mVmruiahls12bdL4iJYTIrQdevn4oEzQMWDQJK29E5PXt.yL.w7jBA5BjSI0nM2SF0JH76KMDbAT_e9KeUr4kmZ_TJ1m28xTeKifMo3P9YaHeTu79eh3wvQ9aT.6EmbXTk5obt_vIJjlvYCUsGgW8xVbdzTI8Hy60ajEKgtxAurWuhxxZuBVF.ZKvvYylyA13CPmFOqEq5guBTNqtJCOLi_A3gtgUSQvk5vTqrlwfUCru..0CrM0YQVU9ctmIiqSrzIHjg1eHfSaoIbgIz6Jj8aEXTS8jgoamPGeDCdoBnJcoTSGyvrqfuuxUPquMnABXv4mKzP1cJ3rAijetRtq.CtjAEejI913oSpf_4b.NTgXItCZsOZVxXiJuaYPiWAgN6NlKcw3GJcL3XpqPhOchA.8HKzd_uQxRjlw.00gSBbsAyw40MV5rIrJI3q5ZGLlwaGsJblWVc7pQ4bSJ_0K5_015Dc6LeiC0tf0KWskTWd2KhrNHPn0P0EEIY3NNQsYeV.VjtaoUzdpwSfwueHmgIg0b5boKDqJN3nTEMp8vDKvkvTa0TjUM3IMLOx1rLDGVTocif3Vq6Xg7R5FST.8h6wuIBSZx9WLy9JLXrg1E37Z_mlOZGxyiaHyt.pDOm.4HQirMtcHS1a.OKIT41DI5dSEDN8bxnjvfvyXrGjFbjuLIEuT.8lMiKfG41gsTB1RsK2zJ1HvlUiEF5ulwckl8C2pBXnG9QAMEQVp5VK07nYBOy_ScaE14BeQJege0PGKByEV6U69ANmUJFyR_M18WTTWdWtEJc4FMY5pSX6GszlECLD4_75sUJtGxS2ulP7Q5XFDPivsi.48zsNlJLaKgQKoZWco4_sF.QCCpO2dDRFsN3PvbrW8yoLmewBeGsy2630Le668.fvP.ycq_8icWKYVDvrNjQHBOspWC9qasYmzKyrnzMCBgV3NhdEOVYQEVoteia8LQG8qPRtLAyH.yk3Ebecyea.4etisizV1UBjHAimy68kZSc.YDXON0kPkIb2K0waHnZV_An6PKdNgE2CqgzImdtfsU6J4uN7Sq.LmPT_qVu3P2RKGD2C7.87Cba3QrI.RzIQHLhEVrLIG8PbaUrvzL.ykxPfoDWu8AcfmtWm.2H8isjeiaLO6SL3mnN0XAQR8E_MQyE0XPJCzr7QuFDq8xxdZToeAyNIS.xaalz5IqpFQu2u18afBNhCtOxwuCXgAD8GdBSayh2poBmmQzmXMhPDLHJs1Vz.18XGs3oXT2JAfZ5VRcYpq.2NXqMIJOtTaodtdXzwWbgtiwKr90sqUAye9Wzj7PvCYfmf6vA.kvjbAV8sV0vM1KvhZhnJjnxgg_JmU2Zplb5lJLrLQ",mdrd: "TmxH7.VjkXk22.ZRSCmWrnUcx8IVEfpfC1yFUWjO6jY-1739223698-1.2.1.1-7xCX20zpPMQoH2aDgIhpAzYYRhYGBLOyIXtvplAFebrNKYB7aFOAAs4fdxWyW2px8TH39Rd5HHQv6dhuBYGBeMA_Chu7pod8lICn.pu.z41Z7.yANU4SDMz3F.7E7GMAYhCqamdEBtNJnsJ8Hf8pinspUWDx8c0fHdG.hMEN1uk4ozwDJBqDtZwixWZm9mMnOv3RgDRo8Lm6zIj_Z1IIUwno0AQON6hDhTrMnLMQkHUhHp3WIK7nPk_tLVG5FgylPmaNPMZHM7UCrCYdete595nXFfRbke0f4zK_chErtSxbZa0svQrz8HV1u_sZsle_4_WlAV6P_8iA3wwi6q_NoGXXG3jUC7r1kkAwrmkJ06Uprd2WoKS_UNttcnOgkh7xQ_4B6jCUqN6bxHGSqcDG0y5O2RYa933Rdabshz3CbeTONiJ3QobXLGbd2ZyZGXB1cUPp1ipTs2pbdelTaJnQ3EVWmItDP.exx8hT38jHuQ_2ghagLd5dfKf3eCvl_64POUNO1zXZMEJIPFlQYqUYBplaqDSe5_4yxmiJdlicFRxGibak3skL4Di6qFhn2PECLjT0xqtZ5cjvduZc3Xyl_tbh6a4P0ipLHTZs8Xy5SL3UnO3gzGjB3fdwSgbDS1xRx7iFk8rHLAuFOAj9Dv.rtWJEnErX6uqmK9M9xxvHyC84wUoxYqlprFtoviOsU5NxlThq9ODvI.n_WnIaHnmBO4UOAF1EzA8YWbWLR86qyQdXXhlVgPW4xGmglqsaMsizfW9nknqaxMil.FK43h9l3xlqP9YGdDdUT54zqIArw7mldlY0fMDxLwO2Mb0eEadwfMnQq1n7tBOUo_BjscRmRzQEvF51DGXHPqnsDq1McvobHcrLdpyXhf63beluuXVqfz8iH5TH63XZwhMdVefKU7lrLOiWCPsXZoPOMS3eVczgtzv7pJGrcOK_sOL_.esazD6XNyNXbpKAdmmstv1R0GctJG3M7wq9E8fSOgtSbNYK_uLKmnjwxbjQij8ETZGbBfsgvtnIPjtolSQ2iDDLwcr7b1gF7w7BhI4VIQDxBrmJh.xgs2xSXFHk8YcgdjwvlCSVDKHV6WQe7T1osC7545SnRVWY_fkHhzhyhLntZQctK2VF0mpElwBhGHj_6qiMbkCcs_LaU2qxPbcD5fAcOX.x8J6apK_tyGNMtKfC56Vf1vLSZ.QyNYT8AcigqdWk4iDeeYTHDUXPzG2amJDbwK5WwkrZWrD9fgVtPiYWxScLhd0BPASp8TezWvp8xDiPXRgS6158QBK7hHEisMr8m5itt7_WiPuldeKvjretJPzI8LziU_CSH4d1tCfBHkVfgrH86qw9C8xB7xf5vk3qpvS7RLjKWPi.UizMr89PlG84xTeowddLocfLK.nvuxb6tI8t8gGoOMnwHbfxb7f6VVMavy0RjLvobqdb5X4xmIhX3wSZYa.owqIqjTirZewoMKbkzyE_7EOjUdLl.hTmzg62kG5aaRBLb0cD3dPE.jGv.gLMmcD9vl92HzST3nYrPuV7M65.v8..XAL29EPxZOeEyNXOAqu9h3.akLZvR_txrUZJux0xFWRLcC78rsoi9XOBODfaCI81HkMnxznVy7DE1ilG4Ths.ZN3qPpLSulelF5Gxf7jwu0fiilWWzyKuYlTQstR5jAQ3RCewZcp9gFw3Hg6d17EbTxSS0wEg6t3URtYj5zI7hkCXFGryhUPD_rr6qCwAcOYQisr1B.lr8dasIyv.0H5epi5jrwy5I5ZSJtKGv_kr8bg_FubisK9y0dkcfZfr2_qDGPBGSLOIR6JzWwmJzmPx5pDj9D6HqeGQSAuJbmydRO12of9pCWUr1nAnZMvYte.i8AOZ1_r3w"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ff43b0cdfeff0e';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\/620773309019?__cf_chl_rt_tk=PaAamIqbWxrtxlTajS9qgGmmzkzhtGHSQPECclOprGQ-1739223698-1.0.1.1-CmJgrc294dWXPYPZTPhNcsD_bSku32Dn3G3xdY1QiwA" + 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