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-6094723815-gov.caltech-edu.pp.ua/post/063019760787

  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-6094723815-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fee54bbf8dc94e',cH: '6HpxYs3cqpJWAO9vgw22XT.hgCyufzGKYLuxFTbWl4c-1739219831-1.2.1.1-j6W2chrQkrC8lxAWjPgPqULWJtQnMXK.fJQ219TnvYc1AaIiDRgrYnXsh12KuNKk',cUPMDTk: "\/post\/063019760787?__cf_chl_tk=9BTB9xgA3qfCn_9_tYax8VOUaNcyJkou8STHR116uB8-1739219831-1.0.1.1-qcltLDP_S0Vt5ZySSTMeZNY1k7t9.Qkgy86q9g7ebYs",cFPWv: 'g',cITimeS: '1739219831',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/063019760787?__cf_chl_f_tk=9BTB9xgA3qfCn_9_tYax8VOUaNcyJkou8STHR116uB8-1739219831-1.0.1.1-qcltLDP_S0Vt5ZySSTMeZNY1k7t9.Qkgy86q9g7ebYs",md: "JT3QGYe5ayFij8IlGgUmWNjpJAOxxhhVJ051gu0l7zQ-1739219831-1.2.1.1-nlCHPNdC1z80GxVvZNKffOgGFtfn8hGWPuVnDwgarIwnidwAOeiYSZDlqop5D_rj2CfH55q4ug38eqUoo9bGmAvf2iKjmdjf7M8FYzBTgRORA_nnHSnp8YQxk8CPyKmBqyg5RjFehcmQLlAUXlpkoYkmsH_J4a1b1EL0hiZHC0wp9tO7izeix3yy5SRXi79pxTUU0o.Wv8SDk4itvw5Hb9LaRQgr6UFZ0iuKJHYsz0ygFUysJSJZm0hdhvlPdIb8jBewN5OzUt6lnQ6VPvsyvMkn9SvGMyA2xyFRZJU2TjoJr6jRzRN9nNZs.J2WTJDLcpbCyCxy9HuikfXFFYlXhggj4C7Ai1rC9XFhlWMkEbAMDDmueVcXFchU6xSB9QVYjlszm0noin..iTOE8JeQEekAY74rFIVb9cpHqJIn0sz1M85SrkLB0uiHnoEaJ3aE_fK3LU_r5Lrvr3_vFkQp7qkvdYMwkH_6FyyN4JELoMQ4.gKGsC66sbxKRhakH.yzF.LdX.6NsJ2BavcJD5fcw3IAIssInGOoP5eK_Sy.xcB0FFH6_0V0lcHaAl0xdoQyCPJRX2F6k0IG5SrGNt8Uub2cZJ56IlP6CNe7p439Wm6kGSGn8C6ABvQiC3TGCk_2yoEacAsSLv6ea4AOTje0EcPxPsO.Sz4EKVQuoCnktnPyUQwiJ5WIEbWjgoP.p1Cab6iS87fY4RJaKdJI1uv1rTg6x_BTqWgR7KiDSAiHOHa80ndyLTn4mMohNbAPM9airBXixasRWKVtpxfwTxVZHRzV5TDPa_VLqExsP4Kc34eEMLLE5KIsG9vLI2VYSB3P9K.vpLfPBJ8d44tVjMhpOK4KsmVfx0kOPW4eCcJYWGaNTotbfkqvfG0hWXRICogt9AMX0n_R9L53xRlp1jrKbzmOzk0Hda8iLBRoqH0IbT9T1AX83cIcgC3uBFojLqxUAa5Ce_N7Z.__5d3tMQBUVdArj0I4AVAJfaVrXy4y_4tgm2nfLNcatQD1WApt1jfZvltQJnSPor1zMWPAPtxWl4xDo4JnnvU6bKccyNWzU9Nlmh6gF_2P1RENYaHw5bLFaVjTPINn.MxY5Tq1d0L_KPtSpGXCqkkaks0DyLnZEXMuPaV5ByxKwuQ2HNxsS7KsN6hZr6JrLioa.QLalAHTt_PYge5D73LIbj.YB1QoY7f4kXv9kPDY8vA0LUbqO95PAW6cy3vN4Z7..f0wTf8XcunS9sUVGoivEfRzAO69pSmyCJZi25yU.ItC6itwXx.7lyBTOfUd3WqskKcq7BWTjo.zQh9SUmqanIh9jmHp3yZNtGSC0x2iJQ4xBVbsCm6GmTuV2KkRgcIoMGqztO8SswXIfo40rojedkuGexDZjBeeCdtR79C3lx3i.uN0Or7pgV3PuojsxcYEuC2qabIPRqcILa7zcDuH8Adie.M9fJG2jArpE_Wsaxsa9DS_dA3QOG6o5PnN8RzccntnuddCA1w5_w7FBAxO.d5kqmJdrGdogC7s3oyQg6yTnx.6cgpXgVhkneCbbgG0kaccZvgfGtHrJm42xNcIjs6_CnpNTd0xckqwnTXn7_v.oqDHqcfWHo8dpmODSQWgbgwtNJxJYm.YYPa9h4edRbwMQoHB9eU9CJmW0AtR2xjQs99qpEjhv_Il_9y92I7Poz6BPUquiXv2w7tGS729eWZxAgxzN5DCPvl7lsgVhvv5nocslkg.jDX9cCihvI53YHLakhULY1Tbh13XVR7Lz2NmqGiRsTneh8vv09SP2Z6R2He6LhXzsAFgJ_bfkrKuxtgyqP5RTJMxO7bsV_Aql..GA0CCSm3KWBWf3qMJCe3KJ0RMAVZk._n6t_HCPtYSMpLONpmSjbyCAoUJj.md1t69OrTAndD4_vMEr6dYCIe3BZb4zV.9K.BVwh3oK6hY1GgyzPZ3GocDVsJs7VA83s43j2pK9YatOZDtFvZf31Pt6UIxJ3qu3WM_AROhQTKyY8vjnB0YqP4Dm8N8PEbXokvmf4djCp.QuzfpNhxlLilznWx7_CIt.26eDoX23HWkFeEQ2YfWc7ZYFwxdsrjdjdeYBFn_UDuVv6xW65qtOwsRCBoa0XaoaKWUiQS7IAUcgtXbjWnXltcMDBsNswb599ETeB3pC4fxCd9ZrQobbe72ah7BFNZHpGOn.AEGWTf7jPGtlBUY4giY734RybswUXp.UdL7UKIOA1Y3DSB5iFn07Le9EqRW55gQd4z.uA.XjUY7ZfF9XQ",mdrd: "zUmwDhE5A0CcEUQ94J1xlv9VVJWZ_x.BVrevJ8wi_sU-1739219831-1.2.1.1-PscKEFjbU9EUv.Tzc59kiADGRq8Uzc9OWquDSB3Godo7Y.flYulPAeRUOjb_bISJjQm9xILscmc1JhgOhl8vSY.vd85AHHt9hlkHS20fXDkkPcEsgYiNVqBTsSxXMfJiRE7j18G.8jDfSx5rWwuGcVyjC75iIZ0iOME4y40MXnZeXJrles_Gt3qeU95cJUl4x_r3TTXE7ywwk7CM9DLSDQwOwbMQWG6WcplpXOXzb7w.QVHB3XpV5ve0zQDaIo8ICrSrYL5wC45o1ZfR_KFsl040pt0pTW79K1TaQVpYalWm1W5xb7Mi7FWtyjHfTUASBCxJ9J4zZ6MDyXUexyf2f9Ore4sI1z89zGj2EjNlZv6TTIU1MTjL89ED8zvjijjIVRgZZsjyn1EBHxs02tCp3eEg0hpw7eKZ.RKtcv9hVQYXa9PxggTKxYi1gyO8kZBNqaTZPd1MRPR5SxP.NxXThWaJa_ouaNLYvS4kKU3NtFr1D4O1vUmbhq7_F5MwU_RKSc305RA8KjQ4C.V0pDumNU0nB10YG3YT3M5sxfcBpGBA180HCNVXwoFKKz5DDAstpBBw6VLClvqr3uDourp43A0HUwCEUZlPnAaW78Zxb7NyKL7Xgo4e1UdKctTQrPKyhFIskBHhqR46zcq7KwXR34FYTRUTF3NgUyLeLH9mNMWyVHsoC7PI4eu1zo9c46vVrnzRWswYP8iELY52OPpmRGwvWn6pP.PSiVeuWxslnr5YVRE9J8rqX60qY0jDw.5egN18LxNQhkLGwZsl0ekz8v5c6lKYezuoFdqfoCkjC9lVwCLA_9lxL9nS4Evyv1uloHbR2vEJgWEmld8DQsjnPhYt3oxmKVR2JXeiiPgw9uUZhNI088zgrFxKK1i4pEeS0lgHQnmbZcs4owmBsDgLCxSdwAYkmihcnZ3U1E7DQynyPqY5UDmNQCxOrSlxmVcwlihSKKKS6ZHMS0vAUw1.8NTgrVPCNEEJwACpIB6dgD9Hw269qbFrsWFNHsm6Rdc_A9bVReFY77ihbkTeUZvy5VlKhuEgnb3vQLLbMsA8Qlm5ICi.kWM9Q6tfoaZVPkZonASm4ql3_nuR1RIUN1ykjSdHpFVqoEpQZp5GAox..lWZQhN0wW5Zycf.gNCWFolQm.X0X6J4yFZo9pU1zTd_TD_ceTvcn0wjeRIF6goB8_KmQxG9cmrB2zzgIT_aHuI5xXAxzbj9SnCta6XI_r7wHS_OwVlNQ8Ualb43Snb2xbmUxphPrS7i_OaHumPsPU80EZLADY7o2sJJrHMZ8hrl77ncRO9N9xKmUGSyp3Cnh5ICtWcIJXTAu0f8iOihppFoE6nSotQg20YXqmResT.g53jA3kQUZwPnn91lGV1lOQF7MaZMB3ZuD2HJVVDdZXDL8plcW8.cwZSgY6NTl6UTRJYuqJA5Ygifw0PPWVlQ0BdADWPMmPM6jGwK28SWJoijq7wD6anH0KKyAfyNEpgC.WaLlAHpCUz2aZVGROl4JPfj92obg3uQqEWq14ptVc_yHfQpGv.JOxRiTJOmE2jOssfdNH8aT7o4H4bg21WwKVVUyjmzTFIEgGbwfNRAii28bVqIt0pjOxAfUWxftHJYTWLREX2zYZLPuKobRAASK8YTF4Bs3r4HAOZhGLnkKfVZ1zrp0BfKP94Pzzr6u8SN1QQX3GnzgDQjVjpXfQCUouCf.oMXK3Rb.Isk6aLfN6ztk.i6I5rkuubh6r_7MdPxETfzr1iUFiy3XZVsnQCJ5BfsDJ1JsSV1gS1a7QZotzQ9xg52JWFwNGOD7WKaIrhcn8PDoZCftui8ZBp_Sld4pH.fuIqXGd92nfj5CW6F40dA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fee54bbf8dc94e';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\/063019760787?__cf_chl_rt_tk=9BTB9xgA3qfCn_9_tYax8VOUaNcyJkou8STHR116uB8-1739219831-1.0.1.1-qcltLDP_S0Vt5ZySSTMeZNY1k7t9.Qkgy86q9g7ebYs" + 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