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-5430861972-gov.caltech-edu.pp.ua/post/938679535491

  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-5430861972-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910049c9ccb72003',cH: 'BrR8KZQgvO46A53mMyx0EkQ.qSzb.WbXDfxGhT4klLY-1739234433-1.2.1.1-1vAKkftfbyNgSoiZuszavpOE7_4901H9gAzBSfSRQdkJwONOXnWV3pYU0WMzWuwA',cUPMDTk: "\/post\/938679535491?__cf_chl_tk=CHQARPdJWN2hQ.uiLvbKn4tjpWf4qSHja6IrOwN4H2M-1739234433-1.0.1.1-zwF0BXGqusQK3Svlwv2hAXff9iPm7kMdKtn2.fL25bo",cFPWv: 'g',cITimeS: '1739234433',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/938679535491?__cf_chl_f_tk=CHQARPdJWN2hQ.uiLvbKn4tjpWf4qSHja6IrOwN4H2M-1739234433-1.0.1.1-zwF0BXGqusQK3Svlwv2hAXff9iPm7kMdKtn2.fL25bo",md: "QjD_Rc6YW0jRi1xwoo2j7kwsk_VLoJbfz0a3Telx3Wk-1739234433-1.2.1.1-g2kQrheQsd8j0yH.RkDMOzf5N17EL8XTuW7uKtzjwZWOpRk_tSpCbbsZ3zEa1hWVkSgCHb0sJ0Yq6vva8SfAzrpzcGtEtW8WGyEdbe4ax84Rz_ipZZw02mME0Vsrk_llHB4bi7gKycZaynBwkPqaHAV7v9i84Vlbcb6UdWboqGOno4AoJsKlvBcqoXtyUr8iQIo9LI_vjvWDouPNaYVG5EfakaN.tCuI48W6GY7K97_mrUsGVllhStpotvHeU9u1CmMtEnMpVTzJbv9SKckQ3cqdKRLvpnVJykmNWmdnkOxOqPqIVVsmhV5SGyfBSzxF_m0rRPj0jgvtDI7xdy3zBk9w7ynSiXrDx7hnqdmrtguHx16dlbdmqnWZd2TxAZoVu4rMOxZ9G2KSCjQKiYIZhmhdDrxx91Jdjm9Wq880AKwk0P0MwG1TmWpq6Aicdqt9PjI20NVY6FsOC30y6i91wlpjVswSufHGG6U8J5t3ClgpouTYq6sN9z7oQFAUcvfd4X.mhF_B4Xnd5lDkUgy7vTMeCTNrmb9bKtH8oKMc3GP.RN2tIurK.xUkNftPVjJB2SgJu.55YmJw6bEmJfhto6wNTvdwLyBcol7a9sV8YpiC8uLm76D8qxeoBpEfzZ8.NahXuqZdMWqxV.M6vjUw294m4AzJadEbYX9WsbzQ7.pJUivCRJqw6uYVkXf2tupf4BgemKjoH87iZ1hfhVTD4SPcgBLdXLC6TEvqAHtJhOKwJbBfyq3Yr8bJAAQzxpe_.65.bXMtpcLjBUfc.s8mT.umzAb3Gsn0G3Zr3ow4r_.VnYuyLOyAOZPoJgocKDqG775Ws_jGwUNFCx45redS2_IzMxHuCBooNy8_ORd4EKvHy3JyDZcBVVu7haSwkNUhxS4Aey7CnzpX0k7POmWV9E_Pa4SirhwJS4N5s3h3SLFIgmipJk2Jzm0Gjrk1YBOK_JXvrt2u2lbqpN94DaNVjA3bGTrV5CO2puCw5oZfG3dsomMiBe.w6E.kDBCaZclmn58UWhOKG6F54ax3zQ.P_ZW3gITJnB66ZOzBJH1F5PYWO5l0fsdzAntJLzAefNsaW8xuOENWrarHYDkXQjMy44k43k0XtqD0DxB8ahoML5SVnEOuA3uyf5CZxMQq5JwgVgr5Gwv73ntxE37tbpbjkaBGut.QJkHDRJee6GtyS7EL8TvKy7eGzxehm7_7rx1lFcmXKo1uwGei0..WMlAWtunfnUp2v62ZG6_mQKTO516xluSscsmYL6CtQq9xPNjaLGwE46QzQ0vEgYHVS3CcBnVgQl.orzdg4IyI_plCL5_d2pHhCREjPeBQpyAJcWGtZJga7hPD4Xrs4WSL8s52VSEzKLm___ZpyVRKMNhaGWTY2FVzNBg6i7grdfkOMhoJ8Quj.vo7slxqZLefDb80c3dTc43OZQB9LvsWT92CzjH6LQuVAnJFbAbVYPRVeuDqkUcM6_5ItO_WgKH.AxXtBF3Np..NYkLiifpd.pOEXpTMgvxs.P_RRlybmFpUH_y7Tq9_R5KsJtAvhxK9M.PcAwr3wc6MyE_aJWVtWzzryKF5bEnDxwmGLpDxOZdO7Tkxe0aZAGlaTFXGw_oMn28D0lHGe5bceHStNQQ8ehmhDoKOMUDDJi7fGI9geiRiAMroXyqRUKARFtH4exldMBVXGVgHTsCbG8DPXL6pujjFr6P3mYgb0lhz.W9qX2Hjat_oC9FmLokkS7bRjwVL1oMsKYdtqwVWEStn6vc6ejXsWKC7oMNIeQa00_0HELrJLgLL3cTub.rVS4hRE1LWo4F0ZhnKvHmzncgeMISoRyipydttda63X57FycKgVjh6oRIRxIjeE.Zkov_SRr157xgNNznjQCuoSWagSTZ1Bg3YJ2_Ji_9VDelJ0mJm9w5FSzcUy4hQjJKPccJYhqrSzzeU6iA9CGZUJfutr64_x7E1bhENmOmTZCY44I3C4iXQDVEVDMk.0DubdslaKkAqEooMcp8_jFvohXxPWUSp6SM9QKKlf8UDIyoLHsFH7gkMnpvmov8R2GemJE3FGEWteOJMe2ySJEuubAg0RtLw0fV3kUSkZWXUu3xYd6EmF7J8PwLWK3jl9.G88JbT9eX0qzxRxYV1Eon.l4KrApx8YiFTwtL4J.LgX_VDZVl8b89wGi9MgP3_dM3i0rB2Oni9xY.wF0AxoaE1vHJ3RmOFRNssX1o5cNR3rq0q_LU3YQHZocM7FRfy29COJgewbtseZqBXOg",mdrd: "967NaG4P3pySar2pIPboeOOPjc4dlBRGvzlxnhDuNqw-1739234433-1.2.1.1-T5mTD.6YgIcA.IwXRMhRfteMRCMB6DCWu5nWXNegzqGWWnCVqQ78l3pz.75qF6M0bgbdRXyUXrTVv4WOXl_IYYpoVJsyDWKnfBwV8gQWgbNPHONr.Vur4vJZh7mb3pD2A1LLdgtpuX5u.hadDNL8yCuBr940sFWYliGxgAICzj06BmddHwTbyBhJWHMBt0xCi6.TZrXVM7cB2lSYLnyijlegEE2pCym4dYuYIe2b9YTx1n.TVWgV0zLjyeScENfdlAfhm6n7dmuNTuHgNHpGUUSLl_VTA7lKrBCOxi5gMYX.D8F7hznX1LUE0W8M42ahkntRKJVQsqlT_A4SP.byB.hArD.wVPYKRRrqynsb6GKtGP0sOtqK1p3eju.zvRG4NRNgsbDot6x2iGTwR7Gcq3SbyMMIG9x1UhTFlxWOQ0JrHXicAeittIKiCRjg4uEq499L0kQ1dpv2eh60Nde9oN630dloNbqm9XpF_5Fc.H_rxhUveDjb_kbTyGVNlE7lv3Ry6pWkmx6PwtSd3lJKdyrZe0cHnz_YKv7eGAZj_aedfBJYfb4LSa.rA5upN9luCGomU5breyaZ4UWOz9_rkH9yT7Viy.8KxVsew0dthrDXiKPchKSQrOMAL0NQSJFgNGCjZflq0tMhNUDpy5qRgKPBTNy6kusNMf7I3y0dQobhCzaQ8zFPbV.fQor3Lum3UZopQcQKFD.YPFUbHRRdrJkEJyxk3lce298DhVclhjDf5Xs7LZIEIty0RCA_70UkIsEeWq1NUz9UzIKH4hpJBa_yfyrSAzwLsnEOnNDHfIk3iXtbz_klvMSg8k83h1VjEf0fg_7.Esc1A.xA0C9.BhHU5WnY8Hbx6YfgrIyzkOWAGg6N2gqJ_Z5DOkdLAxAix8XIOf9cIs_qtA52QaKVQnXWBtf.lCtre_RIkAtvIzd6YOn9dtMD6T3gnCLxLbEAWVqVduHlZiCFpfDY4TTY9x6N_vI4HObYnMDSMdMrh00ZgWv4xEPJvcQB1pVQ0yTHhmQ7t8HcnNTbNSpTTGzjps1W5slpIBBjlMN2w8vsqG8z3I.CEn.WivXWZPLyrGZqxMxqpJzILrYeXU9Nj57E3LENTxTivM01YoQ2hyfjQK7lxJuF.3h_x647MOh0xqn1eZtCvW_bDsyMYZf40girTFNbmL1kei._vk0G3vzSzQ597NEwhuS0r3nWctlCAfT8SLvzwdjlvh4psasIKa26VVSbT2GO5B.JbTuIlaPj5wD5Du35_UIM9PFi8.OaDxTg.Gi1Z7Pmj9d_GAKhLZFJP_yWnbmj5Ha.jehBgM64yIiz.jW0QFCq.u_HNwfJ1ZA_YkRPKsNrRdiS3jIKxhtqRBEbPJXMr6EfUK3hlJfZCM2gR9lT8No3oWZt3mJkR6XZ44FFoXDTT6_V435_Gf1xmHtaVH.ThX4yeDoM7XF4k0clOZAbI4TOFmtlGUkI0OeaQEvIiFrfpQl_SAka501oNeSV4q0eum6wEZCL2qwqPYX7h5ycKOc6Hengbjz_8VEWkyARBbKJDEHmaxXOcBRB3.5vDbSa8WalaqJoTUtljnBJZZzcRIVfJle8Zbfb0sD4g4hSYXROFjk5xUH68DQGo4ai98qh_Pz2hS.nUrxh3UHm45H0ZUv29a.ZHWKfhUcNW0eMdGkjGIzOuxGFZQQ4E3RchrV5XuxWXlA_DlLRViCXrVfBpkb7bMw2z7Q7FkCuaQpV5zygKMmiLt.aqpE8olb4KcyB7u8V8dw_vUpfuMewHbDRYGz1ibZSm378DZHgz1lBixsXHpAPi04kOVg0aGW1GsHVsUhOnVr83_w6wmWraUo0JGFWswhAcENJDUCG"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=910049c9ccb72003';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\/938679535491?__cf_chl_rt_tk=CHQARPdJWN2hQ.uiLvbKn4tjpWf4qSHja6IrOwN4H2M-1739234433-1.0.1.1-zwF0BXGqusQK3Svlwv2hAXff9iPm7kMdKtn2.fL25bo" + 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