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-2519346780-gov.caltech-edu.pp.ua/post/343513145990

  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-2519346780-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '91013362ff678224',cH: '4s0K7ppiJbNQUCRhZApMsxFF9cTQsF1gmacxctq6djc-1739244001-1.2.1.1-mBj08F2tN5v9OqoLm9lbrnuyBTcnBJlp0AKN6gEpz0nL3JP6vqS3D2gh9hWYxYQh',cUPMDTk: "\/post\/343513145990?__cf_chl_tk=pVwB8GULAI363ixXIZ9zG9MpF1ifoDd1CDt3bcw0CxI-1739244001-1.0.1.1-9U4p6dBxkYc_5kDy_gjwvZGssdOmh.582KKu4DWzYi8",cFPWv: 'g',cITimeS: '1739244001',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/343513145990?__cf_chl_f_tk=pVwB8GULAI363ixXIZ9zG9MpF1ifoDd1CDt3bcw0CxI-1739244001-1.0.1.1-9U4p6dBxkYc_5kDy_gjwvZGssdOmh.582KKu4DWzYi8",md: "Z5sxwX1XIX7nFaD1ijD.O9hNRlBI07JeLJ.Dqfd.73Q-1739244001-1.2.1.1-T7EqVRqodQe_duIqU9m_ej8YbtFDqBmjQlgQLJze3OA1j3Xp_T8xfNaVxiWofM2cK0kP0jk7I.J9jNxCSOyYpT45aQve_8cBjfhhTUsmZ0QUDB7WpWcsA2fo7azwPhJoqZu_ssmAeWkv9TjbD1r5i8idwqjI5RP1JU_OOXintwQnKUac_c.yGLA29a3OSVvPwADCUrldQQF0zOIdvUPvYzA6ev4V2F2svBlmvTkbBdgiixPoeZcigR1V4ENt736sHzjtwfHUiDPFGCMRmkCknME.v1jK3k2yu_0GGY_ywKJLU0ILnBcSWlybQxAi2XIVNEODzJJoSNvPpH86.Mw_afbmRKFCBoOeG7MM0G4wYcqt2UBRd.TQ87TIS9Ihe3OufULvCj7Kd60.ZhRK9avKw9bV9U9wggtiKJ..3vCmO8lZO6oRKBFIzMq.ci.sL1TQCfKDbg8vCmLrPDmF5Wh_.O_RJaB.ckHJiw6kRmbT7lEMWWaA2QsV9JXt_UvUslJFWqxKcvQ7akKXQ65qb5vZx7jLDuYsP87hN_UVc9gX5C1_FLdzBhcuKbexZYQScrvjenlPuSv_gdQaNh1srmC_MCp5NKr3kAkq82TjDHP6n8rCJJGraDSBWiwWSGZTpVLpMSm72XelnbQ.j.nvmYQtNo7.QGJI.ynvCg3ttw9wBhPsxZ5qFZbyqbAYbGn9r_giSday54oG7Ky7Py5asNaIIP4WtZTxB_a4IvUtWajawkBhj7395AYsSBbKU8WZpeQQ4Ug.3kgTLlRJiN0FJEOdbNVUVsIITc6Xw..aUVz9rfXOLdrXPZU.5oGU2BZil.aVliHstdrYg11CS4JUqQaCbq_yOJ5L4eXB_T2dVajwVpeAcORJR8XxPecvgDpDTDYKMXD2oN83InVrIDayRKslvBIUsjwl1zbaalw8rry47HT1wyEdvhdhcFA6LsGoNqyZ5gFxwa.rGD9AD4QG5wPkTwmwp0VDC8nsYg2WkCYimlrgTwF7OAZTBS3VYocER1RdvuiXroWYaWZurC9GncnAc4xhm_Kpz5j3izG2mfpN3sl3wPq5w.rDZ5zwwOl4czD0e3IBcXAgcx9ecyt3cdjGwkz.VyVqiJcPA_wW41uxvWW2kTqeOv9lDxNNbXb30F4VjXrJXgGyzzNz.YuaW7Gg4Vs6AwnoB2.USt0xoxiKtgnfqzpG4xa4QyphI90tOLqq7vzzCUlKkW2nANl6W5vaCfpvybJFUo63LQNiVn_8mkyY0jcmDlQr0pKd8yeUb6S7KSq8oddET0qx6GvfPzAzP0xwKL.9NZx1WPBvqBICvMXdtd0bPXPG3KxsHbWlyVIDeShNRYZNsyLDMNF18W1x3AHb77r4lhZC3wOpdlzHrALZO1L.8NNdZlapove8TQcmzH8qYc.vZwNMy97umVvZKcRy.UzcUZHpjqdKC0Pu6PHmj_Ay_Msm6rcqaqZsvRYuFcNGxePvgHv0HWIJitQDHQDq2pA4d0SHcFdzcxeILkpFFmy3LogvBV7HBFc5IcGp5ATbssE9F0tlnswRh7t4bE_Mx40M7XuhjiSb_24H03_MqiI5jHh8aZEIuCnB15ur9bb7JpjZbhHraq.h.HOaodPOEZuQbnu46giaLGnLbY7gjlYwnF0jnj7Cc2ZBRsOuJmeZBwtOt5FZBj2xcHorGGEVypcl9ezY_dd398U9dLDLJpAJi.1JNSd2pPdOrQTgS2DmQQ4RSuPKcvTL6xZ3PxTEyf5cfGRSMjoRA1v8faYPyfAczFxCANg7T5KkFCoQCtTDhcSgk.1e7p95vrfTIWd8ke.q.qN_iWhd0FifzXFkAYWZot8w_KJyrRNaJhs29ZoAxWSWFyuVl8FcZ.OPliJyiHJP68F3HzFUgLkPo.7F0WqBv3rOtGe8pAPqsue4Ud5T3QqZ0Si_KdMu1D6wuqNbMJrQkhAwDwT2W_qFLnY0vL5rR_4zdgeTGG.StAnEd7DepVOQIx1ArHPOiB_DTW6OMWYPulSOIZQWesDhVzzes13pt.eOl1fIB0WJZw7MWTsJDfiB5QQxtuNPe1ZGxgTm749tugZdIwoq8aMeQZMFyNTEeOtwQ0scTEohE9H2LC6RZpBSqrCHASbhODB0mSUfqurbySoKibE6bUhmAy4GTvdPGw0soxZqJD8OXN3wnETRmXLV6aXFvbBdSYV8uQ9lLy9zfrzOO62i3bM1eO9H7LJoJfFb1A0rCO4XweSe0BmJhx400FABCmYH8jxgLw",mdrd: "YL7mn25byazJD9XkkhOidOdvKcYe5aNrqtiUV7vssbE-1739244001-1.2.1.1-gripUS8_y8Zi3y3MIdynzuZeMaBr4LGy45LNHwN90ICbq8TC23jCDNud_VcRxHDvFHhCjYPkYzdRA22fpeupYp3U1IT.8eON84q8BVRqYYiu6Qq_WAyxn46A4l0_ViF.XJRVPCCt4uNXAGFjrIsUw8OhawHWOUYgeyfDTwnV2XPhcxVS_TUCiyj8fOSlAv9Op1__Q_Lz4pD95prSUC5ha3JN0aaGGnef1WLlvz_4_gQlhd1lVQSHa32vp840wtbGtEPdYFqMZfnZY80YRqtw0.b2sFBRROeAgju_JVJ6BWYzHOarjHVyzMf2jCLAGbCByR0wBPN6f.3po9o5_HBEx.EAtZlGp6VOQZ3YPA_6OSDvyQPeZfyuIK5qh1C9wCvpnHjaf4AHd0Tu9swif2b5y74.B8JoQ8_ihRP.XYSXLlNvazpFAEzUSMpGiGJea8JSNYA.j2_leprZr6_jghVK5WZzWLvlOal6rtBhtANh4NTPr4vVrIYbBg56KXwnLUb.KUHAPzZArDvJV7Iv4uWL0y0C57.ftsT1iYGjFrveVok5d0jeqVfvtolMDYkqTlkgTh7f7XEEWf6lJ8GaaxSe.0UnjA6vbGYCyF3FZbdy7740uh2Mix9c48EmnnJVeg24Hz0zB8zzOB9InWmrnMn0B0gYek3.0zvoM1XByej7cRi7NefQW_GZop7yTrRl2GFSm2uv4Tw2ai5mGAQ.4_ifwc0zNx2tWedBDP_4juQPwh_Rzq3i8X1ias4tIegUwrawJQhBJr6bC0o4msXvIScHyMLPVGvuWya9JTocoAU63MbfpLy8EE_XXNRKrhiejX6zYCU0v919F4mRkLf2kB3bKQJ2aftR5ov.r70BT6cc_1.oygvntrTx96ym2AbULt4bugYdi4.BtDT.A2qByc5ngxif9t1NLIPC6S.scVeMTsZmH8RxWe4Rq9vpFqc_g0TmJ4awVT93ZpqLxmtnf1xk6OpiE5oiJiiTWQ1VkdHdGXKMLbnseuwkRYQia4PNnnZfeTQD5LHL7x5Gc.l7r8EoAGqipM.UPauvZixZhursErqQoWIufp_1o_4yAA7oAVIxEXZhIbYzkhRhsf.bfrj_qFriGcXaNwpyCvbUkVI.Z1GKVLutRGV0R4qypgcSBrymEQF_YZVvq6_8CFhaP1p6BhccSm3eNFLB8n_0.jzf1goa5rWKfaFh4E2jKbmohdUaX2ew67uZjpEumNSEcgX9G4Fm8Xy.Pmlw0dxkdKhTUAedit_U7UUTDvu6uUwjXkc2zbVNQOi2yd__0V9rofduL6G6M_2SilCk9Gbu_Yf1XFKDhYXVNhyYIuXK0DVp6tsLv5h8aFvCSLUYC8trgr5BOdspcBNv.xUpRStCA0smsW0NW4wsqefNRC.7VJJP3QRh1spRQoNs0UBFvxmFwTBRmHb8FcpQ4_ywxzIsK_9IWNs53yVxVBTOQ4HOEA_PdYJ4K33l4xXfRGzL2n5ZWwBXJ8YFAtUhYl9S.fPZsDOQ4G3bxgaoE.oeLh0nsImSmMQ8HHpHdK0vRlUq7lzwsu4msJYgtpVPmZWKxJKYvLqtAXwzxX2DwZs92FooPPbDV3hioP6qTqjwCGdxanFG4XpzpTtJZp4QUyGk6iasrlxbttZ3YXpAAfCw0B2e8cGyY2Gn4IsgS_EVr15LGpIcWlU6MQPKiCPprmwoitQLf41cUknVmd3notFwQxc.K7Lrl4jJwTqRah5eLKGnS6lIKYyHWqAmNQQ_lcFPqMcaojyH1jEudQ46P2CS0mfnIuHKYSuMCJBlTHzX6RLQ2edHjiyXvJS4YkrlXz6qvgmYwdf8TyVmUyzuYNK.vUYXhkGHRCjA_nPzZ8BHrKN5kvqxM6ZEeQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91013362ff678224';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\/343513145990?__cf_chl_rt_tk=pVwB8GULAI363ixXIZ9zG9MpF1ifoDd1CDt3bcw0CxI-1739244001-1.0.1.1-9U4p6dBxkYc_5kDy_gjwvZGssdOmh.582KKu4DWzYi8" + 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