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-6723890514-gov.caltech-edu.pp.ua/post/0945261783

  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-6723890514-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9110bc44784438a0',cH: 'J0U9vgIFerLlZPniHpW.CsKEp3_CFqkycW7sXMkx1xI-1739406894-1.2.1.1-qs1fzzcDJfkN8u_0bbI5QVgjtx31Ny1uBZR9hgGzcGDYrK2cHzU0Gppyn1a0jZ6l',cUPMDTk: "\/post\/0945261783?__cf_chl_tk=4ChVighcBsWyGoavPLieICvPEVYMsS3pp5q7vGIC_6s-1739406894-1.0.1.1-BOgWLXo8PvSVZACC2PybqvWQknKl.Wje1Xx0w9YCmOw",cFPWv: 'b',cITimeS: '1739406894',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/0945261783?__cf_chl_f_tk=4ChVighcBsWyGoavPLieICvPEVYMsS3pp5q7vGIC_6s-1739406894-1.0.1.1-BOgWLXo8PvSVZACC2PybqvWQknKl.Wje1Xx0w9YCmOw",md: "RlSfxQ4QAOSk5zUnb5yKzVAYNKEgaI5h7h69l2PnOuQ-1739406894-1.2.1.1-FFlwjQnONTNXiTvxSVm7vah.ubivK7yWySVu856lVXWsAHq3HmmqiH9XgcyCz.vr3EL0AXSucixaheojTbNg8WKUn5psF.f01FBYzgWMPMNt3wiME9DJzolqQFOutjhhHxJ.w7C0YbbJI39Zek1RbwmzaxWFnIs.uf_lWBuaIBrR3oQcBizKIVcYdixIU3O.pu2Fihj18qWuQXaBWstN6Q.mHhQT5ru6Bv.1K16XqPME1OKmN87hJKieyytxc3ZZG7rvTJTFp7A.bh9D9_JaMalP.lbE87aGRhBHlHHupzDPcWQbqSJXe9ZifTu70w9rT1r2zni_p.K7936VD77IYv.9IathF_U2HZdQbqbRvuV4fClYTFWS.T3s00RqEwpuPixHEpioWL3fAo_pyyuYibB13A0KEx4NKIbvEjTTPsD..KDGjelIRSgv8GwekqjavccUENodlmxYocH.JP9MkIvlXuh0beNt0W0DvYGSm7SSmkUqUek5KJo1pqw0pTiulzCAEJx9q36.Bt5MlznLyfgJmtq0dRsnlXW.fUncDTvbKrJAvv2_iQB7vJo0DDV8LXjvKJSTEzzrZNx6lE.1fxTMl_Vvmt2d62sRSkUuJhnprZVVy_ehQ60qzWEmD8ASHfw.yOd0BUFVgjFgHf1.oMrhNhLGSqgLCbN9_H3KLfk7OZk5CEa8IEhdpIRUSYqI8K0kEj8H.TY2M0BJYyNoKZcORcyRhhq8v181bxLBdvp1gKUBXocN4tNuv5gVhxiM8C4i9.t9zTJDMWqP1o89xE0iyR12ZPpLpILkvYBZrpgAVqOcg7DpugKCDW.9QwGYLjLfqlFVX7htnNhCP7hserqZtaXy7bvRNebvrzJBC2xwfhOMK6X8HKmJs12r4c7StTb5p1ARMUCXzZ3VcMF4d1B8Pn27RNQKOpL8wv.WOftWp9ALewWUWi226KTj.o2zTg7dWKFMQTZ5ImsIPCpFTJp_LWgnJKAPaSW7zyIsrxbHfv1gM4jY2HbsD4x.RAvEo_K3rl9WaxDRgRJM3eKPdgL8O.RdSXJmR1nBffhJwyaBgCY.Je0jiPk9dCu9apRBEu3nwdICLgwNPCV2VkhPhTdRakkBBQB0Z9SYNHQBkOyTuUA0ylAcvE1XYq2iofmbtuNZPPIpcN54B3LKIV0WkPoIudRXPs6Ppmt40BqfuNnFTTG1Mc6nTFEBTywk13_8PrjadWdjy39w7RpaP7JbJVuuVq9QELy1VwCX5yYXE6W_tnrnVNcmEhspxIvwOWkP3csTYb5hUkBiHzKKnFu_YOtTSaZANt9xMo5TeByyB3_sAbNE.oB.EK6zj2VlbWFlOV4VtPWxSwpagHjUk0u9g2yt9NoifJvunYjNVJ625LsGoKJEE55kovHXnpVRIignIhLoPM_EJ72VKwiXgxFPB5XxowSdlCLR6JssdlODOmhv5_wwQjPjjonCebfOEYgbL3KdiTfoyVHjmbf2Mkr244y7rdBTVxxTCWp5jN_j7LKYadV_3OB0z4fmq2I2pNsBcYSXBzUAIZP15.YXsBB0eZmL2SAbOz2W05q6YDiKpAdb5mW7t0qbB81.5pR_Ln3g30kgUfY_Ll8HOzkVk0wZBKmoU8s7nxydyOhUd6TPXngbxIbcfQUp4hnG8PdBLrfOwK__601rVfzUB_RG0a1SsThMrLRMiqe08xpOMnOmxMilTUClE_w0VyxxpfTTwX6uPdXpc52eirw9Apytuzpe8wLZL.9gRdmlpUXNGWrg0MuB78LFIeILrl40wcTfIYrNYKDMK_erYShn3lOjsBaFcvBvxE7h8f8i8XiD1VuerznfhuF1qs36efu3LeeUqzWiu_Lq8ZscvQicxigABOTJp.vqIe3uOJ.nDTQNdkeZvLfLyb2bbfxa2v8FjJmsCf9qnPKs6GBhwzrnGr8oOm4bdOg9sVhrWPD5.i2we2r5C0CspLH0gkbiYt5pVvyN.EB0k91IftlIgetIzK2I5rAWntobLmCI41y7b4P46OyMtUPy278.yRuW15mkUSCXmb90YJRh3O_Nl1uJNWQo8DbXqZCe2OucoJQRIqMAMrJZXfjtCt0NOOFtuzMtXx4hiOMRGRDmTtrSD8rjW2i88hXVfPPD6fWQfz_IBpEEbtWANao4XfAsdi3vKXDl2PRyYNrytSbkdzHpzsL299k153scywxhzkS9yFOCf31_qFVpNgptjlok6AGS9l9DaWmRe5wUSSdLNdMoRkoj2Qz_mFfsTA",mdrd: "XOaB7tJbzGf.lhHrOjhCVVFoeeAfelwn0ieZteDosys-1739406894-1.2.1.1-whoR1sEuwgbqfk8Er0TlqnVsBjYnNirhZ5AqqTucMSZk5OIDCs9t33MzKSkGpQxCnaMOwe.ccojxfjyFCexV2AqDSHVsumHKvVrIPS7jguEZ47YPvaEpWTII6QaObr76u80alLWjFwiOFlVaiEauecQl3.hOe0LcU2a_oanmfyFRxXDF4iWnW2NAIV0kbij_XrrAflIVV1Onwsu9OKQTeeLPZFmt6537ONuMwBtGdREqD4SxJkj4kgqzIJ6XH6nuRQ51dpUPrszfWu.OGzLQcfJ0q6QnyDMBX5DcK4yMnLdnRW3W.UqyeEYdh3ICoQCNdl8Kkt3vFCgLnt_kEanXm1FWjeoXZSXmDzcDNwzf5W54WKIp_tksIv87kHsi06u3nJn_JNR96tSgO_f.QOpQwlom2XQay28NWj2D.PuAOX7zNzw0ilq_4C.hBXmhdbH0299G8MJs4IaDJS26jxBP3LyE46Ayk.H.QPhWI.iS.AC9DYOWnGwPeoZaYhokqRZaFHSNqV.92.cBfPwQcIl7J.rEYIGPAIwFL65JynjdZvEzWdFQTF8UDmueZsdEnui7g8eAAJDTuQ8z40vsz_rcAucEFaBl56kO4GFQPGvS3bFI1deAL1H1qXAnjqlMmN.1c9o._uXeqIQkK51ton5YfVX9Fi3hMUb_zMZGPCXqtw7oNHDTWJL460yjZpGt7T8oemarv32Gdv.YpfVc3xQKl8Z3HRsDHnzXxLi82QN70USSQmmvlmBCaLFhWEBEaisr32oTXyHZtPBR4hSTYsz3N13BTTJ5KCVP0g9KQEMwvkDsmIv0seblhZ8mnaWP..2O7JgqiK7hnhGw_ow8d.qxdQcX2GWyuiC4Pj82y75sGuth9vVKjz.TpmydoJtsdc4COAkbnedX9n425WU0R4S3.uJulYvqHCVi4mfGeWe9GHJ1itW6MxGzYFsXL7UZyuM_hYMTBbMZQK_RGGVn7hDEKqUeLctFYxCbl7oahjaXnvsCCnSjpQPT_DaQOJTMzV6ufAhuuxEh0CEppHue5ixiSfgH8RqoxebJnQ1805F_UJvC13sH0nWAMa4bFlQv26p0wv7hXhJdb6a_ItXggsFP.DugCFbVFFMZKOpWDtv0J2ao6Hg2TWubuwBKZyLLjEBswJRJqHLWV5qa.CdSPvFGfbYz3iFKlc.csfIiiDecaieMiTgy1yldQWjYdXSzFZ0S7ZaeajdeEHTRBnDWYGs4uiPB0Bi4fxWwYTL9D6ob7sNGYcMyrjFWevYitIVIuYY5Qwg2qt4SDZ2nbuDBAQAfKdY9Lo7PluQiuSc9sbSj6SGM23FbcMHUOhyqHvUp1vS8PI1EqEQOjS6FhpsaIdXVbDwBBx5QLEAhIRwtFsCHyS8ExgEWBucSpdGV0w2jKm5J2gfOCGSH849xoOkASZJpt5snRB01ODcsFEDluFuEtaRCAR96p8O2TFu2tTT0T3NODg8ZR6N80_dDGubshsc_KkVLSLA64a87NQKurpidcI2mv9GudvKw.Xzq8nplPCjExzK6XARL29nuqxILidarP1E41h0qtTeovSqWgxiyHEwL4UgkRyJ9pjykcZj.p994pa2klAD6M_nyyqmGLZuMkqDHYWwSWBIEXn5Mk8wvuR06fDc.GPBa4651awtydCP7LHctLi7QSJ2x_rbvlKVIvczmp7V5uW7.aBy8fuBJeNh_K.jZuN36rRf0Vhj3iv4FXjr0yI.RH43QgIp7o19CIiPNJhRF3BuvksXHbynRptQuUBwDCITabeblJ0GirCleBoQUGbMXr3c949lCtb2o2Q"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9110bc44784438a0';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\/0945261783?__cf_chl_rt_tk=4ChVighcBsWyGoavPLieICvPEVYMsS3pp5q7vGIC_6s-1739406894-1.0.1.1-BOgWLXo8PvSVZACC2PybqvWQknKl.Wje1Xx0w9YCmOw" + 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