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-7143926508-gov.caltech-edu.pp.ua/post/7143926508

  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-7143926508-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe543b0dacf27c',cH: 'kkB3OlTV6tFGvZI0hrHEDB0gWIMl02BwK3qT_pD829Y-1739213889-1.2.1.1-RwrqO1CGBMXN7dnl6qfTRiXgNOz2H4LnKxdn9RM7kW5C4HNO5Oje02nNqUnc3Fpj',cUPMDTk: "\/post\/7143926508?__cf_chl_tk=CLAns7bqhH_GWpfkbbdX5psvAAdtKh2mZhv05_FKkFI-1739213889-1.0.1.1-6feNeLKlurND17a7N4i.MQmOF3IooQllnkkUPUk4FJM",cFPWv: 'g',cITimeS: '1739213889',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/7143926508?__cf_chl_f_tk=CLAns7bqhH_GWpfkbbdX5psvAAdtKh2mZhv05_FKkFI-1739213889-1.0.1.1-6feNeLKlurND17a7N4i.MQmOF3IooQllnkkUPUk4FJM",md: "KvWEz9BpZIPmWQ_7cgfdT71tQ5s6PBde8KJhitPTh5c-1739213889-1.2.1.1-g9BmXZDMrWfANWt_sKs3pRWBv4vWAglGOLyUyxCGYIfF2IwlESs1NrZH3aYD_ZRDBiGEWfDb6QuRhq0ww6BU8w146WL0Kk5fcEUOSW40dvNuPiKiHqKxPRkPqKEHKILEMNXAor5z3JdiPzoZOsTuCeVacvHPf_8WatjxdHH.BLiZWfBR6OK.VhfhPaU_RF04amk9RYBvbV..dD5RwEJNDvOY.eFTbCF4Cta459vctiuB2V8QAqmn7QQ0OYKd1uXoHz.FIathk_0u1xtUt93oWC5Z1hf1y0z24PFuoGr4z3sxUjFyyKsPwEHwJulV1ddtr1t724.O3vKCXjKd4viITedCBHqRzpm15fPvuj8aFPVrxayZxXcxoqqS9iEpln3sE0WpRGI8MOMnSB30TgKZdDbGBGYvSfXV0QTX1RynKFt2s_eN34TlLR6h0sfciirKwjNAvxwHxeeerU9BJAvIjxCbYmAbAhSrHXpXdbG8QF67b4Sq_YuDAzWYFr78Si02OMgjhwDhBEZL_B_Cd.vwW6eyN2WFvsQjz9o1dIv0Y_QAVq2_uy3dc89mUGyaF574h7vjq_lWYDV4Ah1GVaGYN6.82QgAwTQsEYzu9YcSRhXecLZoLumCRs.ZUsOgh7_ZIrwYjU1OmbS1.bB_a_BguLQFubWQ.m36EEOEyhW9x21cfNwuQp.O4wUnFMTHhjnzpTPT1G5KwMLd4WRmu.s1kGXd0v4Y5iVEaQFxtAyNzRZpJdrYMrBazSTmA50a4lkweG1nfPT_SukKjT58kkmGr92ZtqEUImFDAMOUK.KZzBzuD7mqXHUbHJ7Q68ImK_sdIHgbRgvb64LuFrUfpg0BrenHbVzROwMFjlzFKPAvb7tFpdvhXACukQQ7L4UAQHcPy52hOTblOuBCFxkRk2JNqDT7ezrD.bhcuX5PQQO5wwLjli.d9wWB64l1dNGnOX0jSuzWy3wNiT9azxXt4HYG1jO.bf7fi4hlAborHS50CkLkhsUV0WusO1hgFaGiIw6G4i_EP77EMSI8xJIogpIDOnd8wh4AHXl7w85VsfORoqM7sMg9ix9ikuRLR5mgI7AKJ6akRHFgJOE.4pOVtCLOrdAMIi5b2.ybst8ezxzdwkqcch0kMv3zyiwrRn9P7FpHoLyFdWpgAuqZNjOZNbEewciQKilob6XWZTNcykMYjxZh9TPkY28ChNuzLQpxRKbTcN4RdoKfG2vj3usZPXFbFyNr1IiYsqZVr4C9VtdcO22iSM5ExKLrD4TJVZ0jSeYL3yR6GPJTv5U2Nw3Vl.y4OThi1JYq9JKtj6ZzrHtEz.DSo1XIErlEz38t5BpNoqlbq3xQIbiTz4AAKfde74vCLwUw.nYsnXY6CDe6fJME9xBRIMI2HnIneWN3Gk608iGiOOXVHtg_CXQNShqTFs6Hrs3UR.5QBlGycKPEQBnNaHY6f1UghiblMqs4CWaw.O9KhNTrEHjrK_IzXnS0GJXsuF6NhLHze5DLtW7k9_zA4j_MKXAAqQlTDNinSB4CdGOn9Iz2r2Cjk0ifyCTLePzcq10eHVdGYwv1jSupMUmYCnYXBYD8K3FczYCW8_JVZzvqpv7uW0gW7F2Gu31BUoNg8xWNzutw_XwZwA_c_ZDZzQYEF0RfuikChGS_9PhtUw81FOmYQetwKoWuEdhek60oFbsjxz1zadkBavB0BoUlDCKXi0xSEIOJ1yb5ONSaQTYBIlBHPQN.FjkFY.6bZmXaWnCAJ6xEydjl34HOa7HDRDZ5afECz_Rotxfc1yGfffb9FURNUdlgAUah9zUd5y_sEmSGphyGyK7FaGvOWO_n0QRe8XR2mM63yatDs0P1xobKYg0nBpULReprJjIHNYXDYh0Xq2xabvdNaR50vVVIpPyU3V4_Rli0ZszfXUpko185x_ZleTlmaZ5j9EDtw25TXmY_S5x5bfQL0E9KT3LJlo1onpxtx1zN98bxk7s5Sp4IN54u11NsrUJFXub6ZoYfhdMHrMjfuecG6U_CcD.8KsgjAoAby_hd9Y.JB7JgioiooOnUu17H3jEhxr85Y1E9LgolKUlS0BRnps1EthEva75FJqvBUTxzlISLLE6jbJNPm50S7HWK9B_wAFYpJlh9yMMC.3GT6jqw4PDRpIel16NWsOf1d0U6ULYykXyF5O7JH_L9ZLj_JobO3SFdPI6Ug8CyujsUEdnQ.ayLGzC291a9AnRP2DSD0UWCXf0LfF3X20fbe_E1u4ZWGXg9N_UVgg",mdrd: "cj9p1rN2RWM7enrWE8Z.ydQAfz0EqCmYZZoXeiSJ4VE-1739213889-1.2.1.1-VAdtA5LneGgh3lIbnspBQWzNsqJa6YTtyAK5ns_omiFPjwlgvFy5XqOAZyTfJJR8dEzsMk6AHUcTiulq6.PCztE1ufqSOsdLuoTrwhjB8oqW3luqqTkQ1duVNgZMLOJ2jIb4XE6.1sY1T1EGRJ8vvSm8HE1oAzXPIO1wgi6_Pg3WrST6eKLJccXCBkA0Ea6gLUcOzfDre4kLnoKeSxa.eEzXbdUYGldDmr7A1rWCF20oCNOCvo_wXj5IUi1bXj_..3zO17KZqgdl07yfyCpOxBOnj1HzekfVLf5S7EGT_dB61Haos_OZg6iZ8c6htsmfMTtqTXyPcZiVlf3aHGOmgmdawlTGWNRsX8EfXucJigXe6TbYYdtD8hQ6CtZXxdXdWs5zHZ5f5YRiBsx4z4Ob42okuX5WJx0MrFv1xQBHdRY8wWCaneigfmkq_5qrW8rneai3cX.5XIW6.D7CFdLE9BduIgl0yE2DRGYfueYy4uVJ7VrFhF6YqAbfUBpdVXEW3hBI0UZ4fzomngXo347zXCSvr0N2cr9yrzRqkiz_t9FIhkR0JNJi8sNdF72lSeeCINpMdG6o1oAvM9ia9QBAQuppo26neMlNIjuU_gY63G1ef9Hk5sW2zyXz59q9qFgj2ghOQ9NUUA0D.TJfFf3Sy8JMRHyRBP1Svk76C8HlIHA.5_bUgpGpbPj3yuVmmn2aRAhvkxnT9EqsnZAoW_cmY6yxJvu7iz1YSK54ebLvHJZCRPYUt0Frp68Kr6qFyJUEMuJI8MQ94KxR4wgBswa32tR7MVFGJ8X0GqOqzuoiFgUQsdSOlO3tkHX6CM8uLhA9XaYiNul5Sqx.RTdLfWTDmyCjpzS5E7IgjeFPbhwtbxptbdDRzfbE9j2OEAUN0g4D_jSlP_0OPNBVIoPZN4goAHhnFbB9pEZB0IOhHdUfVr3mjFMvLXU_lMIzYWz.MXHInn694uFID2gqiW8DT_wNY69En4xqX4CI4knyljHMZTvIZkcvC1OHbasDPs.HmT_TEuc5Z364mU9OAUfrvtWUAaqlMLYlRRhSfjDPJ3.EYkhDk1a5tArAMq6HT9gRohlM4vhhWXSfIGQu__RJ6xTjGgnFBFEL_zW1mQehrQQ7SP3A45PD8_3ZgZq2A7Akid_ldCOf2BGucahaqbS4zaV.Ze6PPe5AWL7sQo4Epc5ovBQliJYC156IPN_SEQpOwF6LWVpCEqcbKF_q7mnGKn19dZ78.m62BcLDxEdIL9TDG9QpwvBwtxSCEN0dgl8KGSqf2NaGDRe8eulnlC.kiPoUGND6p0ayr4OQcxipI0EuMZH_OkS9f9PE5QvZerBprM8LzmITALW0A2ziy9xtERVhEv3asyToHlfRDSFqsPviX46wxYm4yb98_WZQBOeBiWa_YRrwOGdnI0Lo.x2Bem28drOpndeE7vb1w.rJ8TXYK9W.3LblIaLI02.dbHdiqBiUQoSU_QjTOYQ.p7KceHfLa_UYuW4up6j20C.DaoNKMPGDHiAx6zy3_SNGn2Ky48S79GAjqNKp.0I66cUQpMdMEkSROYZq78k.936Yr6dpkOMsJMKt_pDgklfqk9tYpVUG4lJVEkBsXa.fTLgDPZiz97UVhPq0S.ty7oAO3d454esmFOJ79vGbmelO8EkdU6BgAC1uCw28.i2e5BnTid8BoRXbxG81MQ16RmqdKshgZ8tP5NCISSsSBiv.jaDE.HCacPASWWeVM_Admz5.RXvZZFR3k_E5bnZuRP9SPkBMmII.t3vgHSnRn3lNyVEleQVfDsvgdbCIPhzK84pyJpotFnSvCh3Z7nWDvUjriPP3qJV3.rC2E4mFnkF3dappy6XvldRftGH3H4pZ309x78Z6_A"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe543b0dacf27c';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\/7143926508?__cf_chl_rt_tk=CLAns7bqhH_GWpfkbbdX5psvAAdtKh2mZhv05_FKkFI-1739213889-1.0.1.1-6feNeLKlurND17a7N4i.MQmOF3IooQllnkkUPUk4FJM" + 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