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-8690713542-gov.caltech-edu.pp.ua/post/927851556023

  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-8690713542-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fd09bf8d9cd6a4',cH: 'ecd7S3QI0nud_xR5ykrYr3X8TNosaJiAi2f7zsry.J8-1739200353-1.2.1.1-Cl2_XjK2cmB614W51A2K_.2h_hI65S1KVPLNnpgt96kzyWTQrG5iMmSSuFF9wt3p',cUPMDTk: "\/post\/927851556023?__cf_chl_tk=7FyhvkEDFxw4vp0bcX9I5s1SE7QB27XyNDWC_hDOgdc-1739200353-1.0.1.1-D9jDYC8cW0G5q6ItWfyQFUWrZsHNPbdTus.0QLTxdgE",cFPWv: 'g',cITimeS: '1739200353',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/927851556023?__cf_chl_f_tk=7FyhvkEDFxw4vp0bcX9I5s1SE7QB27XyNDWC_hDOgdc-1739200353-1.0.1.1-D9jDYC8cW0G5q6ItWfyQFUWrZsHNPbdTus.0QLTxdgE",md: "6s_KxBoRWYVjgwPe7WfHkthjYArMXZbXdOc_96ClNXI-1739200353-1.2.1.1-8IMLx4cJlARabhHXGy1LH6Qeyu8kFjX.UZFPdnRfZhG2WgQ11z.Rm_z8ubTEojbnJSt37PdIXuE9imT8XhHpbb3dqGcjin0mvvhazFmRt5ZSKn8B5CajtlsD.4wtpGKCUI0cNq_hPkBQo.fpdMp4rOMicJD2IkCVQSs4Mz6elWtIOc6NTAKvlkM2FJnxwimDET.QeuM4_wp1BRAAQ6PROX9anA6EIbAWj62CI7lhe5EGYz2ZGolvnSpV2yk.zUZqxkLiIIAVWk1KomH1NyYehuWXIwEEiYWX4vuHZGdMirfXss4eZykIxpgIU4aJpFu_zavnf8ckWPr1sVVRpdnNaF1OHuKHWR3JvI..wKSr.dQ7x_UTVKYZObF5.1b4UtP9fPgJ0MxAaRk0Ojc7ryphCVHrUcrO0aiN9BEK001k5hxR.SrPS1EKXtiCDafAr1NE.bTprv1yvGjIEtzn7ezuGSDii5a8D1sNLfSsgbXOqukrI7RK5qvT7XnjuNQ.AnbxIU8qGBE8av_j60mgnjpBOc.06bD5l95EUAEI9wMqIBRWPQu5bPklb6KGhq7L.PONiLMLttSwzmB9PXx_MUjGq1Xia_3GPGHvL6sk0Tr15zs0eFdsCFoZc7_1dfug39vzJjCmGVrCoZyKDn6wVLvdGMTCkF_RKE57Pg959ElTxms04rh1EYVTg0ZPYYrVxtLzxWFc02ag_RfMcIRefbRgjU_vgHLEONm8meaeMgS9gBkxKYYLrIeugc_.RrsZ3maONI.3QF.tcCqV558CtKuSCkNoQpgJcK29tDkrzZTp9D9JKrUv8tWHkOAkxlO5bUWozi.phgXVYe3NV1uyERTbyIbv1HGlXLFFl6jdVs.UcBirWbVw58z_14bycIRba1PrMGdWz4V.zGqKDHKn0xVapA0aG6yVzAZI9NicKxSvITbJIPtXjk63Dj71pN5vMMpBHoffatEHbTPUP9MPAppHy7JXXiOhgCeDB0nLGppPbyrzo9q5Fd26iGS_PCB8O5oUrzttW9MyWp.Fe1tRDBOnS0QXITQfNTZQSLo7LbAbDD2kuaKXpnp4T1mgLoJl9OaLV0N09d4G8lQbYFINmqAntIr1EkX89vbNWlztfOI54IK7t5R4orBDkZhmXR3EAlYzjK.UFicJtYfSBypNj0WIogppGoQUz4PY2WrDFNPEfXRaf_fYLAe4wodU5deIhhtXrqlrDZKGitYj2difqGRZxK0YA5WzrJrV0DkwZHCDOkZR46evuBKghbkGZzzoBIVj04JMvnrpltLqIGJ1GPkggq03Qj87oyCCi16o2waaM6vtx2yP4TPNRYxr1Do72ELEVjhox9XAmeslVuAzKtI3kYitjuE8Xm_J_KwEM1gG_Tl2rbW2wL_BpEzS.hCAx5kYzfc5kfb5Hh1O6CCJYMdtodubwu.h_I3Ztzp6VjDjFypKw.sQ3LMkEBkPFvREdyjROlZc.SVzxX0IRQHzVKuktyO7_b1WUMOS6S42W_USlh8lmCiL.y98O.ITJ7UBqT.YKySvcu0czVjqb4T91oyix55mH9rwkqmjo1lAgtsXX6_VqiLLma4NzXz3QqFfBY5DjOT_enABtsOcTbXt4FTMp0yxS3nL1KAGb2kCbjWmWluJP8ivV6gttldWR0uz4GZkl9MG3yeaQMHFjTOCH0IRp21h_ot8OpdlAlRE7ltaVK4CC0T2PRTEUTNFD77UEVuUhsAXvGVqfbVTeOJJBuRoUwlnY9Zs1U.tOIn35V80twLlzlnGSxCbtGkCHnzHkji0ciPUtVPCJtJ9paW0cq78hzIdFzpCvcAnjMgeUaT10aFZzMsEIYzComRysU9LgKX1vVRnZ59EjNjdEz6Sd68fUZ.lME2k0P14OFGAF_Ckyy_NyhxgNFcL_kmEZGeUya37QV3WTmGUCvUUZj0S_uYMBIQdsWmZBUnLPgWOU9hE1lducKdGI_kSeISkQc6B1jXggHg0G7C15E8cNcSlOrRJURTuf8rNaKXXnY1cFoQfqQO9ESPtrwmnn7z5oQmf3.glpwQWLg4xYzAZn3bxDg99uJnhTQeTgG.aOKcoYamGZW.xb3G5PbLdzzj17qmVJwRluzE3WAbyNR2LSAGSV6fOZM1j.FrcX_2EfzMOVder.TTqBInB6pupFzuxuYCKCRxRsxN.g9BRjSFvs8_cQtxy0cT7nIFOu2VsFN5puIcyr2w0UJTcc81A5ppOikn_bJy1QPS8AsUSxUZIRHOIs0xlWQ",mdrd: "avHK28LeDhjddNCZMCYa.B12iHUAdSQHXIwJpcxbRto-1739200353-1.2.1.1-5dcrCMBMRolS4qS_FOWa5cpQkhCC9mJFtSuUfrvt48AOpcUaUDWn_KxTNbUe9zpYbLqDU5j.uTcn0kqR4IXcNqJkq188whkeLJMFpXIOq0bLM9R2pc.DpGjV.lnZsawNFAJ30yqoBX2ku0QwQjwcaZ9sfb_92S8MijreLPZ_EpgBVPVCJuyAADmL3ICcuSSPcoFX5FHgTqcRzHk8_3DpJmxGbYSSpHL2Ne2IXrUt7Md93f6nAM18U3bqGWRHVxCJIihWPP0IpK3Vgf5R5Mi_WPCtX58OC.P4tyVsAKyjgvBO2kf_wRQXPmC79zwHtc1eEvCDsTPkCrvOkKXIYFiHkKjrFS6mToClCIgVROO2z4aA2dvuKop2CdkDYH072s09K47XEzLID5ypBD1x31paVUV2pJqHmfHqqJK2v2bNC_F8KP_pmvMndqBtVpPt01tFXCqp4IaADaomS7b0_ER68R0HrEixdy6P.UOsYmHQaQh_rWapkEY8QCaVJ6PjSbu_XYdnmItccVB7fiEH2uiU8LMwTmEFChqZvAHP_fsINKXcswdEIIRocn5_TZQPmP_wmYbxKAx7aNrl_aDs0kIi5zEGTZ8uuvQVqJ8qHCOTv8UCgv8XIVTB_Rj4LiFbgk9SnjS0x1dYmIS3La_sZZJRiJy6N1DB0uM_sPEkzdmE9zj2EKtfyTOP6N4JpTxaQA15hEft0ColmFOYPcpV3CgX1MgAjNUwW1.OZP5.5CMUHijCHvvpHgT_RgpRwrITdSUK07aMHmICH70WhIEdwNBaXihQyvZjS4SEE1g7tk.b0r9aXD1AnfbkZF9UhABiyXQfF32s_u1sPo4uXJknEm0ks3qxzeJVzOgRZ7tMz3j2IhydHzqEvJIlLVzqMrCnHWNxOc4B4U8l6ul50qNUfI_UCwjlSiQL64IjSZUVvd55LOqT6dP01kuLXl8kaOpKvHDwsHNgnZa8npJYaAm9_T16eFRq4x_KvSZC4ALO0MRrcqZgNnQkTXKk8.tERRKRAK6_LsILXvuzMPkbxPOYFJgmWvvr3PtaNCqk.FDE3qjq.yd7zBDIsrRs1B2miPXTDBvlZbasCD2.GlC.mugXDXYHq13ibXteTm0T31bxAA2bhhevV_52dgzptZcUuFyUXPDHXeYsE825eeRf0HpAIg7a08RwOzIb2S.V41abQSB_Lpzwtj_TblD8Ij_fnEVkseez4f5OZ9E_rGRZO16UIk72GcWfpsRGUwPMi9CKFgPHsOJtCJkYPWHhfveymzOTurvE2jleiKpuQV8DpmcIDp.buZnhJOzLMiVgzNYNkyJSuJt3uTNEXRcjkgzY8RDjv0TWMtWqOK9m8.LyfmZJWse2tGMLZhSMxQaWR308uBey7WuKFCC9O0LR2qfnHkV5v.OjH4ccxw08UCftvfmsvE.w.9rr0f1YDVpIx4q8y0Eb9unmrJYwiCppZEsgzP2D3yysWL02_d9eQ4U1AjA5QSDrIgE7LeVgYNXZRBLrctfsqbIKoVVYGMYhDWD2Ymh0W0m3f3bwPUrSjVvx6_hp91mo84a0q7YthQAItMOrJiYtex0bL1lOpxAX3R8VfKISgK5A957HeAJHyzEivmB6jP1xbAiHCc9P1MzHL6Fk9X_jV_BpYoJuRgEnBAl0vwtsWxl8NOkgL7ovEalaZ6Q_erFxPEPQcXemX_pU8GYMW2w8oJM7_Ejzqgpe4CtnCCMvipSu1MVDJJ9ycRFr9kcRaLrKmwcyCTZHv9Z1DRtqJcYd_5Xa_.61T3tDqh4PL9.VUtCcKYSdygUd.faVhtCH_HAK_8Y513v6J1p2x88eTLfElfHP.TJZ0xkvnxHjit2q7TUR"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fd09bf8d9cd6a4';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\/927851556023?__cf_chl_rt_tk=7FyhvkEDFxw4vp0bcX9I5s1SE7QB27XyNDWC_hDOgdc-1739200353-1.0.1.1-D9jDYC8cW0G5q6ItWfyQFUWrZsHNPbdTus.0QLTxdgE" + 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