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-4286703195-gov.caltech-edu.pp.ua/post/333699387903

  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-4286703195-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fad0029bbd07a4',cH: 'GlCCSEGGwv2P4p5UHPNZl8Lf7VGw8QM9kYkZ9R..VK8-1739177016-1.2.1.1-9ec_NVSZJKhxUPWVt7Bi44oTamPx2e58DTovcEcW72e4fCZd5VIKpxZwMyiBmeDq',cUPMDTk: "\/post\/333699387903?__cf_chl_tk=9z725H1pry0vALyt_W02rZqmJ7dHuSep5TMfxlJ3NFI-1739177016-1.0.1.1-PdNRxNAZlYg6GOAS8vMVX.PvcIT2HdUMdpG74SfCWq8",cFPWv: 'g',cITimeS: '1739177016',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/333699387903?__cf_chl_f_tk=9z725H1pry0vALyt_W02rZqmJ7dHuSep5TMfxlJ3NFI-1739177016-1.0.1.1-PdNRxNAZlYg6GOAS8vMVX.PvcIT2HdUMdpG74SfCWq8",md: "7gG94CwnwwWE5HGETRXWg.WpF0wQUrGywyJ.VhPAnSo-1739177016-1.2.1.1-nU7dmj6Z4syxA34b8gA6IuHyh8MQnYX2Q7H96.u05mQkqSvZidWepEhVInbjUkahQJgMCZlmG.uUYffvTkI7axJBFxMtC5rQ1_EoQwQ.VXXzypNekN_y38wQAjxogSTHwZ5bRJXtP6QO44S3GiKi9r2HqZfud3romYjuUGDg64rGiIhSS_3argxB.Bp4BJsEPUDP737y5mn1eTTQmCxJF.DbZrlScqY4KZxjR0reC3RsBKMwFQ6IlYP9Qj4ZIAigZdQ8myUBwULA3zcF.R97NyQ.m8.4m1IkOAdFx6mMDWI3r77X8rxAu3SlRVgnwXfiWYVmPooLtHuxjIk9s9_.8HMfpGxnQiqT27eMXATdDQ13Om003I7PFzYhnMOyVyu28W8Zz1zYGSD4HHKxKOsnOa2WVUgnzSgc0EQE_QHZ_5FXyMZXA650BYvcY2QH0eVCqExlYZUFKGAD2ioKXvJbLT1PFIKzEFy.6N47NsMnemRC0hsZm5LMMQjjIfCv0l8bXycC8wu6fjCERZBylD_dKjXYqLtbMhPkwjx8lZpqt1w_H_Sz4nWV4dRJTuRATSbizOccXCEM6FCpdabQJJ8tT6sye8xcGsz1GaM3Xk4jv4R7dSz4xR8X5ivQYBVkBYvXFm3q4Wq63KePNIN8orqwepdBuFq0eyhHonBBhGuZ6.PR7XyqbEE1hSlhKIzNV5hnti1xA.NtmwjytkxZ9lpJHnaHjqvdhqUbCArbEEgmq.cJZNC_B22NLSOhAw8Uno33iDMm5cur3HJZ6mqbM0bmJx4qOUwp45gHR0ZqJXQfpzmZesOnl5PupaDrMetM4h5vYBUUhRA02uv.nvZu4CkwKCmlq3b0NdhLVCDlrBRI9dglfnmlO2uoMmzp1kN0kiQqKRNa3sLKl317M3zp60UMVozh9FmjN9SeoQGqK8NdGABKbuo2t.yfz.._yKak7CEU1tOWIFy_yu9.oqrm9kvUva3DO..LQZc4sGTRauxPBOJJPNfs0vfRf.3UwK2xak2j.c9M2qB32El4RuS.QsUM5gVXGY3M8_iGXtjeHjqxcznJbDQ5wN4e9dK4eWiunU_239bGMvscgls_OljP.a__U7BGqjhRmh2WXn2ksdQ0YFoArkowNkoX4KCnE9L7rAdEoU_yG1b5KAUHvWZ0IdOONIryypcNz3ZTYgtNnhGD.FaucBOdaAFUECEcw9RJYw_j_4T7ZiQmG10Sh4y5xT8sV4MQ.HpL3oSzZ9sCdQAHwOSIcD7MXKXBuWRs5dfORXBbcbUEL0LyHSjtHBA27ouBRWRKVdpy3aHdvOsPbq1Z9zyEhjGJxCVWP2wWIbrZi1N6T_GvuhajJZrXOibnlymIvGGLw6fR2mHqBjA1fjra9dBEyCSvwfsxVXTAfiHfGavFePoDej5SmR1TKv6RTQU8y0wz6VhtjOexS1NsoCXjqG0rUv0qbnWHKWLnUz5JQALzAoAIRYG3ByV4Y49Q9prMqpGbygbsGGOlFoGyNcbZjIQzdGobdvQT2szgMcPLWswIagBNyjdCjidsY5Q9p1NTZ8mGp1QtzJxjp_8m4UJ4ZyoPdRYbXdM9eB2o30l5fmdtsPzoGcWfFlF52O6fc_8pQEghKHEEcwxtwpR_w26fY.D.Hm4yX_qlf8lDIdkyKEO3U13jXK9BoaSzv6WJKT85hZdUN3e_nAO4fBpVFoqXXxfa00q_ItLS2kvWVMEHK7.Kqjw1SX068.a6BN8jEDolMhoF.36QDKY5bNfXHkRhlUSSRRYfeNm_0cvo0nG.RKGf_JwHAA5oqQuII2oKLTr96460edIbP.VBLs_a.jusaYF.s.zF56gHXriIIr1NuxgLr9sZ_930DYQrr.OuxHejFwzWowwvGBa0UJoYh5Ve_PARJCq0PnIqbhvEABGIb_WuED4CwFbbU5hGRUHEZNA904SJ0mEmffbSFp4qyQgHT5ua5cAkq38FIIDiz7jIHAP8PFZmtLdByFK5nUfxqPi9jerKy7OjuMZ4TPbDwj_GFnbOcmeaH1DowR8.l5Kxx8PMM2fTXRG4fj54s_kIz1zmUISQxa1BbBxb3W8TY0bl9jOEeIg3_El6ZjB7GJC_Kc_iaFPzGKkzfjhxnJCY7DGNgpw23u3lHh.g5vhlAH3p..LvKwGToKoru3N9gRNhF0ZxIR3DJCh77JA9t2P5RL5qRSRP3J9KVoMkCFOtcj.AeLq7eBAxgy3tMxVLryNhNQ3IwvC5WyZuo_PisZJ9yXJFvg",mdrd: "GDVRJBzss1e5aSIFzve0ZtzN.O6jT10s8OyjxUUcn9A-1739177016-1.2.1.1-A6cPJDtqwHEf8pF5ory66I125ea7VJw47Eej8OfpQPkjozKStHrpBUgMSj7e7R43ekvOjGoorMyzgmep36cI.b2u6G9RYAjVXuhPpm9iGBTq9HZy6ZlK3bXA33ckjO2GiK8Bs7Q.In.NOm2B6lYq44LIKZUj4Pp8Thql821P2KeH4i5aORCTDf_FeI2x_uhu.94I8yw.mMGyJTJTam_h.Hsr3OyGi464wzXcmTWGM7bQjCU_wJvuXX14yjbt5GJqaacfJ9yxbmR7FK2s_gCf1Wi45TEuWY8NQ11V6lvKTK2.wAOkOjAFGo3srvBK9svwnb5pFHX5l8KeqYjjzEROOFg9dfQcvYBkvsMfiC2PbrPjcRrDuKeFdNXrX.lA7p05vaZ2uqeWh5xfFinH4BIC4amkEf.yzUa_rLMpgssOZBHTEbH6LwN7eI3IJwUf2cwqoHK8EM7fSvlTn2_Bg_xXHOe2s24eKpoxdMLRaUXG47lGNk8aQtZjD0Ip2jpK0WBi2MuwwZ2xY9bu1YOCK0eT6WrcS._carsQig9Bq4oyMWm2zdV5cnNnr6ycSx3B3zzrcmeJ05gy.w5PsflvDiZFKcJP6Ul6KHfLUtb2yBjlzaZQecMd66hw1lfrp6R7RAWAE6n8qJL.0IXJzJKxbGbFNySpDA2TCzxh8FVFKW3TY_5bEDUzXg.kdDFspIUlp5uvTxt2bPnpWeyl6mBdPdfu1nj0pFyn1TlubsLMQ77JQKa4O5PeS2nPYLo6pzdoU1DcGjHtuqB1aZQQyaFd7M_VG1EKLqOrWfbVcCUVyvKP21IGGP39Ff6iMcQovk59IJqBLsQq_bYg6q7UD0KyS07fwRc9wltgcYLkXMBRkn3Fw.w2D1iEh9svUkzBWM5pSH_JZAWiK5nsQW2O52yqdzO6_fbofVs1_mI.mNdOfec38la.7q3ORR6rj3Ud8Hw6yDClzKMu71Qau3Ljny5Y3eOllBHrl9OK3xUaaE2c2DKOodTHmUugEvvWl47_4JZowOAG3X9K91GCpLVZD7r_4lrq3ECtwfNobidNdUrHp_NpF.uWKCbBiy5gkQHXx0CEuF79cj1Y5iZMCFvYiFRq_fCifaHY6VnTTE7Hjxzj3G6A4AM85I7IGBlgPwjyNIMryJAUXGRcgQCu0CHVLA8Wu8Nj9k59s9Pmklf7BsQKKCYLriCD3CaNOOVNgI9x9gOwspO3XV53YfFLdJCzrJxNyPy4yXrHLzmW47lI4J0J6NQaR_mlx_t_cBpz8x1zJUDPD6ss2r4iM09htE8wFrEGQswhiyfn30RlO9wVmEP9y__WHj6ucmiFAxi4TAjpOpLWc0jjvKHf1KUK.jej9AKC_yzWnRPOStbP3Sj249YAC_MQYifzEhXdIZFxGym4XiWzSuWuxRD2nwltsFWvX0aKTVNkEktt.tLxaTg2_rG2J_AbaVEeR3.38XkaE6bT4oS8KNMxmKlibuN46W25tuI.Nx2B4vHl97o8uAKqIpNODNCyr0xSisBtEnAtAJxbFvfvUihEW56mfxDsA3WmCc1m5x91WVIi47967B0flB.AAGRaqEhErLqT6CJpi9d0HM0f2iWTaM8oAOaP64bT8jpSWL4143Ju6qpmaMH_zlhi361fWV8snxl1TC3HH9Fu4If8sTt1SQf_s_8pq_BtKHags0ghk9GgnF7oZQa2YrgKpF6sjd8ThRcss76DP1DC6pU29BxWdaDFmkA_0sLoNK0OuXNBo0s7WKoJoAhYs4T9ZFbUXYEWaoa.XXV654l_bt1Ge9GowF3y7JcBQpQfqMvIH.FvNygCTpbNwb5T_5KUP9emVIAhFjPfVbvGoXjQfLJDA23G"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fad0029bbd07a4';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\/333699387903?__cf_chl_rt_tk=9z725H1pry0vALyt_W02rZqmJ7dHuSep5TMfxlJ3NFI-1739177016-1.0.1.1-PdNRxNAZlYg6GOAS8vMVX.PvcIT2HdUMdpG74SfCWq8" + 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