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-6310257489-gov.caltech-edu.pp.ua/post/355378284143

  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-6310257489-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910062453ef13992',cH: 'wTS6A4KtpFGW57ejsKPOwG9asQFcF__kQw_GF9pLI8A-1739235436-1.2.1.1-BFY_pywDsfYvMwHb4kIjXAXGuobFthwJfdRRMAdmuucFr.NHgeVUxyZDhtpFMhov',cUPMDTk: "\/post\/355378284143?__cf_chl_tk=bSQQDkIzdfW6uG7Ukyk4QivdJwR5u15XfP_SqoWyOTA-1739235436-1.0.1.1-GRr65h_b_xDDld2PQvCtMqBQ1K7TZ8lXnezMEKM9IfE",cFPWv: 'g',cITimeS: '1739235436',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/355378284143?__cf_chl_f_tk=bSQQDkIzdfW6uG7Ukyk4QivdJwR5u15XfP_SqoWyOTA-1739235436-1.0.1.1-GRr65h_b_xDDld2PQvCtMqBQ1K7TZ8lXnezMEKM9IfE",md: "GjxkWQpjIpuHb2F0gwR7sjXG3lrvLmSkFouCiwpZdKw-1739235436-1.2.1.1-RY6tmIqCK_1Vax8B7r84GKvfwCbztnBo.OUEL2o4_ScHBKL_ZuuyvwowVRHyJf.OzgjX.AJ7G8FBAcpfCLQCBQKRODYiGYJSo0RpNdeitjVa.flq_mFmjMNFxUgCd1IzYxtLayg_qg0z_vtHw.kRovevoROkCb.UO4f8tV.6e2omlSdiu7Rzkc3bgtYdplFB580Risx3FWtzfSpIhEkMm1PP9y5WCSA.SD3WhK7DNp4WkxFM0uOiAF5RpwNA8E9BEwL1cmrEq0VGz1VP9RJbBMlSD30FFQ8h1JoPaSEdMA3Oo_VOfW6VDXE.fcHqun_DIKnKHBkG0sRuxEbAwfJYo6PGJCG7gjU04xcPBaWLOe1LWEcetQEuptchap4oXsajPs9ns9AvSArgU66XVflWd4dtS.Ufx9Ie_PNwcjmHWy1BICKvVrB5bUVCBzQwrza7pTNdraH0639w.xpNPL2buNApY6WPbbWH93PPtqvfhWo6ffrLjxW5vnzW5Xp3U_puohcVwZfjP4QDIjz8jCJ.j9hmwOX2gLvYkxQ_Zm8XVUe9Noz1.XzB1jBNhRmIdLRBbiL_RHPmw2qIedXVwr5VvPDjRMm_oaUyHk6DrNZ_tofYwYyG_Wg8VBoCZhSzAPneVp.ppe1s5e1iuXudP8mjobGlYPffOaRGAi4de8BPpeuLtl.sZUk3MLkcs3A9UtJ4ooCk2UtNNw5WaKSqqXRU3dhLyTytWqNrqwEyH.fP8b6cl8LJE09wj2nEYi58TCVb3ZLB7ed1cvZkhJ7fD7UTDuhutuoPURhnOQsLaOSzDfl3csPGJnQTUwf5xe.m4iFACVUdEtoGX1lK97RTyLlTquShaNLtuMg1JXcGX7BF4pNxbiox0Qgl4_w52j6eZWj2dXyViBbp.qXPRk7cXvJNkFFe2N8aR_JpsGI8a9KrcLpop5xAg6k5en1FnGJhr7ZfomMmSaqG9ItNGq0qSoDjalcwafxhEZm16z.Dejp4iZkiigBqYtBkMly6uRooQ0p1pDv4ON3wV0zosKRakTr6Ys4lDqWDERnNkhOr3COiBlV0V7awDGiSZ_5GtaJWz6UL_LBqQs5RjR08dxZhnGDb1KEEqcnxeBgZBlAPdwNqinWa8hNgd5kapKCkwj6hK44bDmokfplukRkpkQLgAvrdAqd9Cb7Ye9AI.gVUPAvPMPe5GmB9pwbNClBYXraCg4NEYJfRZS7KqLfFSOBuBlqAKnJjaiTZWaCdwgBU95ovcjeIdrc0zjU8HMHPtxuKVkvRB_wQS6v5KMJaT_YLjiHqwFwiQYjd5Fu7S3edeAOD1KR8QHWi7qNYpGXtZ2LUHFOjWJKyVdPyYWpl5AncXHh2vahVcUpFVEQWbIPV1SJRaq.FuYbNavbjuHcaYBsAIqwrIvfbW41g5g9Fu1WeM_P5qA_NlTca__X1At8PcUc4lLQIoMKCyQOW6Fz2o81dWR1X_pPU3ITNYFlHzwtLOYunC1Wi3VMKcYw376DlO63HNnXwh08cXRDxdynRJbRMctw9AqUSYH_1yJARNynmhMcmtkjyjLJUGiYR6ZdrhEhWRnXrj8GWlBVbNPF8MgASgu0BqsMrwtraBVATSlv3C_191Syevno2aStFIsv7jecn_JRD2rmRFH6xba06z01P2sVctPJZCc9k.M2oZqGYXOoG.Sh8Ms4VFqErifPmG9U3MVCLt7qZayc4CzoWo_6t7NbYagdxQ0C4_IigA8kanzrSGZUKc37lBwCKjNZFAyFc8pv73zapmWhpnKfsNGGbggN17NNt12gbZ_Z4ejy7e6C0X_RREfmlZ7RlkHX3aNjsaB8YcOzRk6lfgtPT0Iw5bU_aWgQB0NFyOMokuxjqlB4v.gGwoQckPnVZS.57v35yGO7kD1PSwsFJliZVAz.ZpfKpiUQ5lONiA8nh2oQJM27_YxlDylS6dtqvheGas.nTG37n.u77WtWnykFvHy5R8XwOjM7_AmDFg7zaKJI1SmiosvjUSSN64tJwgD5.ISRKgumAKhTY.zOmKLrXQTtFk3ItnQGpC35GlT368zZj3zD42qXXbF11X_6rY9VXc4LCBgdoSSmupam34D49NSdsPvMNBFzmz.sumyFufp09HDbNt5kzlq8FNQC07pNV0ebjiI6XmFUwwR5QLMOnlAySp3.Wakt22ffU.nuuBkWscwHX1GerHOor88T1xoxJjM_c0bECHY9NQB.2UPOXtve5ONEoJ1yzKYLubinJb1a3HSflLg",mdrd: "5Gg8XHAL9.SGkMIVdAEgvdxXJhyKneNzdeN6r2gdGPQ-1739235436-1.2.1.1-vLE5ogoSg_gi1yi90z_dK2JjaeOPJxrUrZnr0r072Y2HueQtRyF00f8dDqR6j6fLwFnW2OmCxM5yCQRGQ4q3rhYSpESUXHUtIfCsJx6ogdavlPpRt7nXqZgTbdm7QV7ksikaaYTlhW2yWUULSYds5.vZXgbhFqLcHeLYkLOpKGkhJUKMuw4RycY3B022pVYLRdjpicXDnbuUL2cf3XIgUIyfF4qnqaOKGmXYWIg6MokK8em_EvEXbr4zc1iaf7RPpr9tvYr4U5CLGPTLrq.nLylJbnCxhkuY_5zPMjYmkH4IsuuH2JWJJa.qjklDEFOkbznpOAK1oUBFgQaHbh9VMiz9MBYEvtpkmOBF20iU.B5.mhVXnOE21g.Nkvgg7PTKwKjpsJY7s1Fvs1F4O_TyY8ZLR5G7W9ttZdOsA2yKClS6WSIIOWKmJPbVbTYQNBa1NS8ugQ5xWya7.iLgayDO_qMMaPOJhvQOviYKtA7N0YFtw9smstRhIczhNJS4uqDzMbqFDYzonHSxBos.3nZ5LgwFW39uivkTV4zjai2yQ00VrdE5pZgtOWTQE8rDZd2IWKgP3dNJFj1db4AL4OE3dTq7gr34txRNkyoYFRc8JFG0TPPgpT9jnhkxcvDxRenkWPbe8C4bfqX1x_JQHEnLotCBOFOtpH2q_RD0Ww4fOAv0kR0IYDUJx4DS0vAhAU7j8X.q0poXnS7dldWZMF5bPIZvRthTswb.2dpSByWK_XLtYgV4neUTemw5QUlQFmlYQfIa5hqZSlKazrShfdKdHHhOIjxsXL928h0UnR0NKo2uI0zoDOvhT_QtCeXywPOO4mJ83udZsEtbS788bwCxqYB1corFYQbSp.vwxvFcktn7XUTwXSyC6tJqG97ZzRF0em5fqjd3LGZ2KrGlOEMApAPwB_NZJZc1VYy8Nxe2F8tC03btbILkMuA6MW43qpRT6.tN9ngCTcHJp2OWAzWN9_PciuWGskBjwBcrO6X0t6JEs8EFZw4FCd1gRBwXRZZHpZd9pOz.2YEP4sFJlwrCf59E_UAZ8tu4StiLz_N6tVt2K7.BcuYKMyicpB82A3ULAAJ7ut7vNuIvRV8TcOzhTodsaZy5XLqtCAiGrJZQ._9MMFIy1Q7uJmuJUsiw4wjRSNatgw_UuYNtlli8QdJCIID.iabCMBckcQneckX3mtlbkBo1wIUzH90sLfQCxD7N2tUxqS5YnNRUAtORurJlzfJQtgk8z7pmJMqrTLB1jAkpf_GfD3BNG_GxHAbGLSzP.gvt1gOqOpMGM0l.Zfcg7vw7nSosNtWcqg.aUXypPysaOvTrL7R6EYSkd_VwW_iriQP4fAANzyG7iDGq2u2kW0OE0bUscZjbuFRXRyMJ..aCyqlMw11EvkIkuuz4GVb_o1w0T50c5U1tOaa7yP8g58ViAe1TC_765LG7XFSmlsViyqKN.PBvVobfVBnoyh8X5567vEAExV7t2NaPNwnkTYI3UT5gvA5aoBTYlR1cioz_QLDAgZPt.ccU4E3NJW_bDAqrP4dnyk3abKYTGJDbc0jvkf.ZIWT_3HITmxkSabWd_zEuAnONgkT36_H0bfU2Vt1.lggZYIuKBLmKHtFQkzYDwYdzIfMudB4VtsBY57Ie7NdVe2ZtuWqpUaXo9JOIls4S0JnuyiptViTR0_q9KeETD4n21Y5gNdcPEdJXFxlIhH9jochN1WBkwl2MM9O.aknUjZ6ZjpBFeAuc293M4KXeMxnUcUayBHRsKBNNCoaOHB2QJ8Sz8QZbtE0ySo5l_uyMkvmjd1wc_xCy87FJ_j0WMjsWspglfHy7e1mzw.krVLL2rIP5_UBc9_Zac8Zd"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=910062453ef13992';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\/355378284143?__cf_chl_rt_tk=bSQQDkIzdfW6uG7Ukyk4QivdJwR5u15XfP_SqoWyOTA-1739235436-1.0.1.1-GRr65h_b_xDDld2PQvCtMqBQ1K7TZ8lXnezMEKM9IfE" + 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