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-1958273406-gov.caltech-edu.pp.ua/post/715671765099

  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-1958273406-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '911045b5dbaaef65',cH: 'XGBKakkSHxAAl3v_Y44OfgCUfFwSdATEBvZfXhqFRqQ-1739402038-1.2.1.1-mdvkGA1cLdMkO2pfoE2hgcZr2c6yDpomFpE0jBbTGSRj0Hdxt1E7Cu0CHFTwqYL0',cUPMDTk: "\/post\/715671765099?__cf_chl_tk=8IZJAVkRU_ztbOC3VmTqQp5r28NuZeDsbzo3QHTaGa8-1739402038-1.0.1.1-ugcPJ9RIrI5pGyt0bQ5j2XWw6JCMKS_6vBrUi1c3xEs",cFPWv: 'b',cITimeS: '1739402038',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/715671765099?__cf_chl_f_tk=8IZJAVkRU_ztbOC3VmTqQp5r28NuZeDsbzo3QHTaGa8-1739402038-1.0.1.1-ugcPJ9RIrI5pGyt0bQ5j2XWw6JCMKS_6vBrUi1c3xEs",md: "Q9PD.rkxxXQgBv7Q_XOfJcW3DQPCb9TTvvTkM0dv0TE-1739402038-1.2.1.1-tGw1Ryc2jpsXYIG9pERhFlDwV6r_Itkojr5uDbBlbZ6NgG2X6Tdn_E5rxLN8LiNV9Xt0UOwWVFbcR8YQnL3hSgsu695HAWlHYp0ONk5CkBHdbgKRn0CC_9cVM2L0epymBzPZZOvI4RP6twtnm63Y9bBLKgU3hrKRLqcfX8JJZnQAyhEfvcTs_GiuwWbqLIy0Z6VxZyXavh_AzzmIfVGJyTM8A.bc7tntf6VnilyhPA2jUhDe0UNVyLA_hM39AmeGqhisu89nCT_K7y6ZXnyCmAbooUtnExvyF8Fk3NJkWJfrFwPmSH9NvMltC_EvC_svBvK_WNkW7kCCtD0b.RHInoin9VTyISMkruU19KsL4d6ZR7BR8XfiBrUhcWnRlKvqTq9A1xdTaodhEFQJMtcNmfiA1k_tfYNDdIWk5l05M0Yk_KTFqFBnH72vPp9t68OjkeyAKiBYmXglgY9RzK81_kNq7vKCpHal3CQHE86YSVz6PLlN4I17uWGddmzGdodWx9.CkLvFPSTr4cmHCJaLWm384iHaKz_eHgCOtFT6aoFKQ5fCoUCp.iObrMNtaEvFwOk6Y6wHkiom1e51mT5CW65.orUJpBMFgnYHYZq73OYeK4z95ASHD2dqO6IB_vmD6_3olVY8al7L8RUlr_PoWuFXYX6VVo54OoKN8bqQl8vj2mC0XNpWkdqpZnIu0jobmOJpGp.tf4Yq6IZWK9TGd4pRHZaXNqsV67soCHVSHtWNXcJMbsqSXOejp1UdTuo9Nwh69IHJymGlvfY9fzRCyyjkcTve4FMO7UZ.FCPjz37pdmLcrlb8PjX7sC8PKtI_rXGBc8qhMJNc8svM5H2QEbQnKk4BCBAy6ZEB_bKmliWZhT2DrBqabrA.AkxIKPrNGs7wy78JwOu_xsRXN9nZ67UU04JFtE6ZOj.1HCb3Om9pSW4M.kFoaf5E1TRrMulkBEkxKwJHHB3Q0_RfIq8nEcAFVwjCqDqS_cHiV5nT9aq5Sef6zjCPQ_UbmG7Emr8s18WTc8W2qb4aIuePh6GPVyi7Mvy7G.CQM.melleXqSTO1gW7pbT50C3lUTnjRJdZv8vOfeMs2WUc53PMcrBtFitqAvO.GWK_fZjsyaso3E7y2xBuwyQHC9IqReLWE28Goyl44MPUxu.hmBsbMOCD1515JbTc1yJ7t4MY4lWbAH9wh6gZYEvjFNRc7B0EoYguEwzjroKxhh6UWnaC2o.WgxzTn0rnSlJdqeg4PPD.7C0nigrbpOGwJUGZCNPP16CiEvx7KD6uEiMvI5fx6lhbq4XrkzL2sJPb1rsX5oa.YDeotE903V89AlkkNWhujyP6po7vOZ3Od_nXIqHQXttW1WJ_iE3nrY.OT_UIvhA99H8taLZUAdeijzcv.2BIKGpa7XgNXOMUbJAih83xPjGFrMQ.QJ8VrzbpmKrLmWUqXsjYoY59mUWbW9VXmJU3QpiKsGMXX.ua9cc098uujfB92AL.3CQzkNJegDepFZG9UpWs8KYVyHnzICWuFibgqoiq2lKC0hYBRLGffUL8j77hCzkxW56B9M6KDgGko4kISBuyXrwh21Ll2UMfms4qqgB_zfFJFLkvltfkXPPkMm40GecZKCoGFMpog8wuvbbdC3NHgHRTtSqaUo4gVq1Akz.TA.j0Y4DmrmwVJn1LeLlHQUEtsCuVw0qk0hN5v2QBgyKfE0xPIoNy62z1Znlur9N6XKwNSQeam1vQSRekiyOuogQtroYfMGHxy.f50c1GX32YbxOj0IcnDv.l7lV1H3lRjQ63Nk7tpxdxyK9STitFZv4oWsgwYTF2pMl.mQ24kFrUYZKssBoNuC8oKGpYhfZhYCLjMZRtvEDG5BMhA9gZ85ac2_eq1qCWWIVvNKJJC8A00C8E4Xe4TSaLqtRS0JG_5IXsLS4dNVYn56IxcZBpV1b8tGWuVryDRnOJElRBsI0xCtWotm1PPZRTPtrvVLEdIB0EDWl7JWt5L5ErraFKR6OEEVUDanxBE8pjGa0SFhCepmz0kv4Xid17luD88X3Dt5fxaKVIMELpxhTakvZCJhvW3_l5yiP1RS86QQYbYUtnuQD7AvPy3I4n_XrJKJiJvViJcm3otCckgR8k4rSJ4Uz.si6CP90xkm3yZBpBwOowMqxt3B4my2h4bh29eSFAyhvRPGAd1HXdMwe6uUpvbuT_.t4V4qQjHXJYjuLXsbbnRISNXuUT5x4qfhwGs6HtZHfYdC99KzceAGqxNL3Plg",mdrd: "EHbjyW1uDbWJahfqltctgBFTH_D1_E8kNFydiYbATdQ-1739402038-1.2.1.1-C7MuPIzpXGHg5uPjzdZ3Lm8etgjxsH.uHhVUrio0SmJtZwk4f16fe23G_p61TXKJ2o0hSwtSdXYmNPPVHS6h8xJRYK_ZQqzYXWKcGqEevq4fxpyd2Waf4_eNX7fBj8uYfVit4lR2Tv51ZPfFLhJKJJofZxUMxig6413DQH7rUIFPMC0dqKBvtVipBmEVZyQuSI1iZtkjNiT.RL8jkzboO0vLugwCwC4yLBuymF93IcRyo51b93EYu1Fjm_JVVmWHfg8MENmobYf47RVEj_lYDqT2vfgv0x9VIFFZ_oNAdGHIUlWkpYfTHj2RzPLtWVI_DA0KADMKNthkn5Ig9yNko1PkdDsMHUFEcmJbTIj63CzreyNxHGG2l.tO9YrHTsVqdYS4sPJudRMQwbMyVWtOeoNgw6Yv5HEm5anpnRz0inax8HrAlSO2NZqzDepCuwzcXXniYkoE4Q27_PmPSs6trDQIxN742eDdNRbzT11yD7gLb2i8LeP_25V.ROIDN7cHX.LV5htg9RUYHp_nd01kpR8iyUeboHZZw4jF4M9kaks1uIPdL2jI8sK9gQX5DYwR2HcQRPY73rFadcgn8.UvIKhjeGxKVCH5_lkyP5UhDr3CHpPGUjia3jUVLCmfDXo0wgCBsjWV_40hr3B3RL_uBRmDa2aqX6o8sNEuIGAoYEmPE.7XtpTqWwOQJA78sGtSz3wexxGiI7.E9T_I87xP0yaIXWVZ_xi5PJ_5bYcVqlkeCK9g7Znw2SVzttQRRZG8QIHogNk0JXHEv3LSg2Njy8jNlve886udrzqhAlOXyGdvkSMKJ7XLeC1TO9sIIsgkixREsK.Dg5lEoFQumr_xaYYFQs1lFRNn1Zu1gVjauLn9RWHfGCv7ZoiEmHrFj6g23Q4H4Qbx9IuKEpEbo9_36Y2kGwOvOy1V9tqkKH7CXHYvyKJ8BqtoXYkW9umkKr8Wz2UwR9kEQhRuPMUPEHcNBUusxNe9H8CtubO4fbXDKCPLImFD5GKKqrrFLG4vhaVWOuEQaw5sNCmb46vguc3.rRK9eBRbyRMht7R1b34k23OhlhruIAfVMgv2Qil8lgeWV5jD6Hy0GmYHBCSqGvDH4hnc6TRkoE2sj0oJllcVc58CUv53ocHpV433ot4mHFAsd0YrIHNZepPqezpkJ85D04pXyLIIxf5Pxvxru2BsigsuTI01qtUFm03KKWxn_ofeoMJGof4pljNgoS_CL3QHN5x9PNx3nzP2xxVoRSZYcozBrhmDxqmDgKIskBxhJDz0as7NxbRBH7cQAOtSOqRtE.VE1vS.IuWYP1g.w6wzHEmwrZvM6fd1NzFejJ0cD8W_TzYOBqEujfWU3QQv7nzIJ0L2YmqVGYrg4xPWY_G4k3yOLZUJaKfHTtG_tnAF94h1inaMSPseb5CefdebX0g2qztzquKEfDEW3h4RX_QKgaA86.fCrNo7C5S.3pdM87EzRuju_6Njpl4TH9FXThgActg_.WDaEk.OHdiFPuLCZinFh_exd15JrtsRbaqGlRq325gAT.KGdLQ_QR5INAHF0pb2OZo2yQeNLtvTpS6y4VhzAbnmnpPsCD_ECnntHd4PBBM8QRXq_dsZUkzeR.d.amQzX4sKX0zmA8G8FXYY5AVbfb9695pFPAqfZ53DKt2hSTHmf.UFkIlhyg7cuKpmutCDHQkf3Z1xnu0BPOG4v.frwIHpbOqTnozVKwD1zA3AN7Z.aIQWwZUvFjQiSyPfMu4US.p4dJ2MSPYpZtOLhYpbtuPoJK1rlf16CoweboJTBF8XPoGBQyZRXJ_UP94y3tmNM23iLUeTIV.WTYOc8ZW7og8iiZD0hyi.86b9yxKTKwIp8EnOfQMeH1Oq3EilTQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=911045b5dbaaef65';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\/715671765099?__cf_chl_rt_tk=8IZJAVkRU_ztbOC3VmTqQp5r28NuZeDsbzo3QHTaGa8-1739402038-1.0.1.1-ugcPJ9RIrI5pGyt0bQ5j2XWw6JCMKS_6vBrUi1c3xEs" + 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