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-0516934278-gov.caltech-edu.pp.ua/post/0516934278

  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-0516934278-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fde5e9dd819c66',cH: 'iYDuzYuUmD9Jxoy56hD_Fx6evdWY3U9OLIlx3CgXS_Y-1739209371-1.2.1.1-tebMNHS7J7ajv62hIh3v0rTIuy9CkQahrpXPje7gMi6D1IWnHJpPyE3oJS.W5w8x',cUPMDTk: "\/post\/0516934278?__cf_chl_tk=yJNW.NmvEu9WtUbcYatricRyYUfpMZG65BWNwOQ7ffM-1739209371-1.0.1.1-ge5bhxiRdu20SJVisWahPVPAkBd67L5Xqum5ApLM0GM",cFPWv: 'g',cITimeS: '1739209371',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/0516934278?__cf_chl_f_tk=yJNW.NmvEu9WtUbcYatricRyYUfpMZG65BWNwOQ7ffM-1739209371-1.0.1.1-ge5bhxiRdu20SJVisWahPVPAkBd67L5Xqum5ApLM0GM",md: "vhnoEXmX3SHPUqW1U8wLZIc950v_kLCuURngnFfi34A-1739209371-1.2.1.1-NNh0IpDUEWcdeLoq9z3hTYLrNFlNIjN26x7FW3h2ZbR65tcwZL4fXXDQGKZx4QNW8lSIGnk7xCGxdrbDGHX.xZb7Q7yAlYRda_jtzTtLD.9NDwA.FkaCa4Jh3Kafz3SItMOy1TpFzRGzm0ybsPZkL7EsR32xVS5aZIc4p.szy8aYkrBzA9awaLChkrMUnRL.tpU1Pb6K3nk5dWKterV62S16tcLtAsgf5H6sWZ_xkJzsavVoODSsNUC8.gSdxh_LVkmW0olnt.zLjwvuAlTvCTfSqnil9xrdpzBv5.Mnu847x6xobkA45hah1NXlK8AEjJFnvtPSf2tklpJz9EjaM6d8v4yrOZOLWKc03461rlTkPzdW8SA5FXxkY64wd9zmB9PjMyyDr7U0tFl.5o1kYmtkLsusjYvsS1E.P6hS_JLbIQ3vkkK_iW.NUE7oe963I9OF.RiVcXD0d.VMdEgI9yu4mdLWqfGhNIjPgesv1aacF5cLjt9rFJ1ZIV04xbPMMJzXFWI2K5CmzKGoy0QcBTmeqEQZDghG28cun_mugHj7S33ZEKDRExqW4L0.vaYY0Fg3WVgX2K6Kjq9lRRnPrq2gcrHT0aE6ru8jrKPdoqmaFIByW.15T2NkjR9eFnA2bg7KeRlUYQs3oMZYUNkQaVVM1AKxEYZ4xFa48rkLjDEWtvmNWw6715Ys__Y3_pol_ZyJCc81MpPMBlvYiMTxksBlAtYNc4hwDCOOu_INa5Txs8k5KpHAJO3HROFGgNcuJZmMPwU6Ks8pcl7R2Vpb1xQiCtn_7AqikRv27eeKCXk.bWFMm52_P3Rezc.s3xGdEZVoBSlvXPJEljBmHCOOKwkY7ykmFht1tmrm.qiUC.rALapQ3mSEVLCMbGDrkZ3vR1hD7DdtPTzpxRSoG7IJidBOqga00UuFHV0SyRI3jqJlCWh3RtlnfnTCA9frMIm8bKHZvBFNaCohjzfsjn0tnDHHgBC5Hbas.9jIMYmguUa9dJD.x7wCOO7Gj9P6VzOp7PZLLJl0xZGtzcsYSjdyiXdTeFPG.vvJf4CBD.UDldYlDifNk7LCwKLK0_HzcOvwmpkeF_0N3hmvxFbSB6B91KTz2.GcBhzBq1JJ_XD5nHEwcyAWgxYbXEGolBx7RtqhGyg7hhTwvDlM6GBPeMKE_XX..Fh6ongSem.YCVWdXSqpVV4insHxuP5m07LIYDaSWuGGU2OdUzKE.awWpqbsciZDQitxDlmTcJuTvEmZjv48BmZfwm0CQQbWr.uGaEdpf1nxuS1zf4Uzk5T09wlPwbm_SNqjnH7JSzNnqa8zfJyDo_Ee04BzhHZqytSNqp_TzisbJLF0Yy5TVbiRyYrzo4FplIFPzJ8DHeiRi4NoQpVnvGkzZxyJR_dFDJfCijc0sct2.Z2tvHvMOnvtY2JlOQbWSOTZOQzYSv6qOpXM27_njB4kOSHZlwviIcp.rFBCKXaClnqzVbAlOC8ofoyuUDjnXkRBAmvGKKAzi2vFHuOutafPH5KNZ6yYvUF.FrVeHy6fn5DiuwH.ME022.3u8SQwXzkvDB0an9uECr6v5viQFzAVuv2ydGaefi6TSbWXeZyesfAYwR3glameeJiv1vius8O0zOMMVpBACGxsLKLBDiW4Jxfvhj8DqknYyHKnx6rscehVOOztaQhT7GgdED_yuZSSZ.7YcjsklO8dR0xFUwWkL_JwwSvgbYTTYglqEl2d4ejPzRJmrVDZ.DdcjUxQP676AW0T5CS7lm14CzGA0XqeYVVKbnuocdaMM90aksDcoe7oFW50sqXEdoAkSKPRytsyuJhyYCJhVgwoFTcKbw3JIJJs0o8w5hDZ.Fbecyw9zIurrHNC8GYng.41aBnwoMrf3VpCMIx0_GhWX83pX4gwEK5UubpWZTVsH3rd8dsEH6CXtXbCkeZI5CcHMUjw9j5A7fqHR_RJ.q_57eCDZQBgHszShdmwK_VBk_0AnJy4usAJYolESyFah7gByK.2.VbEAx9y_U3I5K._vPYdV0sy8FTx7TfM7bk6zlun0ntH5B8RS2bZRC8nFJsUp2UejaGomxbPLfipiBxRLrV026.EhWBmSjwGxE4wZhRqEZ0DwoPSyv7RDtPfnW_Bx1w1laLdbqngO1NWiBJ4rFvWpvwK6yAx8xh1Q16qGvgeFYaK_7c7D2gUvcMCfbXTXKL6F0mD.dnQrM4OLkdJGDNTJpDycjcNhhu9qYQijzrP6tIrSIWAOX_gvEG3z8viAg",mdrd: "qV5B3_5nsncVmIJxOJf3P9wTZeB6GA_2PpH4UphSCSc-1739209371-1.2.1.1-JREc6oLszCaNhUDlUcOJri9uqFxXucti05Olp2GsufrKHCuItCIu2ufOQNeD.TM0H_PIOhacuCkTqAGkCiZAKfGou9yCfEOrIn3zO2wJpp4NEQXX4MnG52wnYe_olRg848ReKNAb1jh4gx7flQh1vet7YZE_f_w9MEg7Z6062ITMAPoh4A7v3hcAzTGhGSubd_eYilZtwTkoBOm1RX_z4FdbHisL68OkeHEMYIC58NQNLG5.dgfuXPIPC8dnzuhYIBJxhfhvVHntUFpQ9nSC_8uCHmMF4v7KVJsbA2mY0rTn74Bo56NHYZITf6Dh45FSz5yrpM33tQQPknxYoFgJN.N28Tkvid0IdUcyQETGKx0qVdnPjpeEYGLGUSwDPwE0_Rb3UyAmqubWXvgJgllfEo5QSaOu8qcyI7p4mHmKrAWHRX6KgYllsACVyHFlwkO7sxhMntUHoiu53Iq_Ik1AyJRKnk7A9APMpVjRMcs62pvWIPmJxxIr3cgIhdjys1fi_ESrRSHASSclI8VXF0U0WMioJrhLSXKbwy2elmJoIiQLJXopMznUoo5GO9zuvdzGe2SbC4_Srlco.sJ24wfTAyZTeEKDUoY21oLlfE8GydWxHlvLm_UaZrlVDjdmuzf3c7P_PzUq972GEi1JgG7f92eSbIX9JIRFd7SOo5xpr1cqN4o0KRjlE7aOIerxXYSdgr.dwgXpx6ryiMc22yfjeWilkWFJ0A5UnqMQXQ16XWOetM3.eZd.A1YzqZy37PSimNSMF2jXgrHH42qqcBanij1VNRT3riyQudAjIXfBkYPkHSTDHHFO0iIr0lqrtlqagLyBGaRganexqD3ah_VU.Nb6_YzXP.qkmms3y5lR7yPiyVP.yf7tjRml5Q1WHq.CO19uWb3cylh1NgTL33Pvz.51YCBSKtKT60lFRwiaQVk66WRNTHvOxVAmS5GrjRsdZBEOU6Z8TIfgEWgeiH5puwhb8.wHbhspcxYUHd3CSbDWYGThehzugBqf8IYhmgOwODxeXXUt88CCJsyOO5Dsct5VoArw5V.2ottv4woylHICyvDDnJfjzvqhPg5rFHzr0XAIdz7nW_AEEp5uYPPFW6DW_GnaBXuLz8zYsMAUS025EfBTow18cq7A_Uug_5zOgd6bHr8Om5Y3Wf2nhS_EEZ2YzKDyaT_ftqoqQj15gVjRZkPRg1nBLx1dI0YL2QgiEdBx5EWub2bKL71CEWnJLPP.RCEL9jcu5ItSdeos2tKJtcrW2AbdkZ58zyGWcaF2mPzcXlsf2kWFe437hDK4V85Ynfo2MpRHQtX3qkGZ39TuLBNz0b9EzsvLMrQ3stz8oAO0ihvCVbdgnX0RmiexjT4aihl.bt09nb_Yc.iIv9wTR34sXeD2NBhJs.VEGOMmMNjkggEdnSmK6yKQYuTSW9tlZ1.ZRWelazpRBRW_Tas9X.mN7cvyDfaIk7TxlVEndcpenv_9_Tj6ldoHPxNbmWtoa7W__dBAV4sDkRDILl_x3ixtUJuq4PMwzrtxIhDkEYm4F2yuUoKrGJO3xLRXH6_hdCTuTKXDkVcumrm319uk4sTqFIQz7dmsycilz05qZuIzHwWNtUA4BMVaw.7clf53IzstRf_0Q3DyZ9AjtADWbu8E3EHn.pIwT3DVA.JTFkKRF49wiW6MqdSDEU0DgOraqXaKGEl.1SHUxzCsgqreuE_Hji8BqhNo9aZKEr3Lv9AiAg3TzkvuCXOFBNVOfGGRTiMCohbhHshztXK04C_kXju2jY4vpfufmfCAo4HrDmNqg0m2TQ8DoQE6ZTPcrrICBtg1oLc3IFWGjCrEPtvV9y4RIU4qZIjoqglMhbWt"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fde5e9dd819c66';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\/0516934278?__cf_chl_rt_tk=yJNW.NmvEu9WtUbcYatricRyYUfpMZG65BWNwOQ7ffM-1739209371-1.0.1.1-ge5bhxiRdu20SJVisWahPVPAkBd67L5Xqum5ApLM0GM" + 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