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-5379810246-gov.caltech-edu.pp.ua/post/2140769538

  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-5379810246-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ff1de56f88f272',cH: 'XUnj2_AJcqw04albSRQY7FTnC7xhTfOxbli67mANwJA-1739222149-1.2.1.1-3XhIl_QBAfelvL_Xxgvt4.bWbXL0MSskbzbnPx4PNBncvzhr9t05mOjvSMeSjagq',cUPMDTk: "\/post\/2140769538?__cf_chl_tk=9J.bvlxCZH0NZ2PuTYWb6lPbVimS84Y0hT5VnjwlOX4-1739222149-1.0.1.1-raDURb4FFJcBOHA9KX0L3CDkM9S1EMR_TCOjAzfWrRc",cFPWv: 'g',cITimeS: '1739222149',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/2140769538?__cf_chl_f_tk=9J.bvlxCZH0NZ2PuTYWb6lPbVimS84Y0hT5VnjwlOX4-1739222149-1.0.1.1-raDURb4FFJcBOHA9KX0L3CDkM9S1EMR_TCOjAzfWrRc",md: "Yc8Uq.qFA.G1Gt1qermN1FDBTE3xxiDTqCJr1kJxzBM-1739222149-1.2.1.1-l01j4qq8jftsu9Uee_AX24.PXmRANb5Zxb9aYejUffyB3k.aaKmik6V0eG9Pbb_8sfAE42NS03hIrCnktVk43CUjH5B9_t7PvfLCyFqHKEmquz.n5fyHudlpC62nV2Ofc_y0_IPYb2LLwTmdGLrWsUYXFtv_6tA5QMLMPNDCENURBYYgEzK2ciwRQuxtXdfkjiDgbPC3NtoAR6LXjBRs6YA2GJuF1wMM36GBm.df7oOHlQSZ_vpCpsBHqWV6PJt5VbOnQEkg0mwzSV1BpnUcx..4z5VCPU.qytIHinoNu9ypFw0JKWhIX_wjKIIkkh3bALOpSAfbvssJjFVAxjsiQob.zP8Bz0Fgr9Pocs4PoDSvswVucDPRPAVSnwmePSp2DVuPewu9fmvJGtyPxZt2qY25xV2o8PoEPcXjDKkA77l.gbog9IzTFviqsnO_T_rjCMi5nAN3zfugtUBq6FAcSu0gZrqEOVzZyuKiqBVkataR6GPXqnV_freixyyRI3PKWXU9tJzY9KYmSLIBNDTAY2M0v9X2dfE6Vf8HrosMhvjVNMNVOUDisxqdgnlKniw3cTFRJouhBQLLy2wsjTgIYUo0xYWQ_n9jQG.04mFmGYPBS5shSyHyw33cCPu1bIjf06sDT_gLcoUjuUzCJwRk7MZBro5FsJ7p2GTNVdMoJGHgc_MTXUFOylleDgXNNN6P332u15l8Tfzc5VoBWdyVaIE6s7FM4cCs1In6jZKPkeGrLecVtxzDDX7f3.amfUEU65Ms3vzdnEf_4rSTxXiONYDfG1g48RTxqtQnaCAR9C1iDBwSpuaq.86ivomMY.bDP2wUDX4Shntm_OUOP5Ck1o57GnmzRHwUFhACDn7ZL1k8COSo0q1afVLKe7nColbGdmiTql.IFuqXTujziJudeM.x3yVUlnAGka4AIXjacbbHn_.QYZgmrYxJHqrQWoI5dSIoESWYT1XGDMRrk.ZehJry_EEYZGTNpTRcCv.t3qGoKJ.mH4jh1_Y1Dooy7F2Dcj7Ov3bZIg652UHvwZVZMUM496digOQmbkJwvE5XF4caC2yxsHNKb3FQ7K5_3ik4qr6Tv8L8SgBOdRJth_ENyaUAz0w7XxZujoHoebqWYIEpCeXlcbSfQ01UXGUr.mXrezR5HoNjrCYQ8dLptcav8Txbx925LEJ6SclEQR8jPJV6OXqmbJqrWuWP8hhl3tIiRk8DZHfIM5LEBb1EJrbVRpTogSZx4KAsGf2QSFgiVoh3q_etz3gugzNUjgzcN1hyzvUo5M1hOJR_LeI4EZZUS_tT6LCR6glFKLZq6KV54r3PWjThMQI8CN45P2x4Oia4xAi_PqgnF.8D8LCZ_rVFh6DdjX_zMq2DPl4F138wrSw5MEbE7CyzDWIJgzjWEopdNtNL0ERSDzvW4HTJgW5PMSkGxC8TkrTLjXc6MsvteDBTVNMd3qxxPqTm6FuKgW8szbXqm6aMrRTPjbqvsJd.e9zVF4zpXAZt9ShL93uUUoiRpkkA94oEzwMxZEV9aqf0bpTks60kbe8eDthbOD7tTvkaDakoBz8ZNcMA91rrKuc66FuVcRIZ4SIzRdEJHPuqay5ILgGCsVMwZAx3s.k8lWUccYdCk8vnqmkAzeMSVVQrnPRUNt4DTzit0SH.GAdtSa05lP3dHiVncx1GulLbcHQCDmlxA0qk9_AJy7IPetQ6MnUthOevslTJC9ArjR9Oh6shLk1jyXPF88m8Fxe5l5HoWcM20A_D7S__BAvsMzXldfx8i5xaj6rpe9BwsfZw_mAfDRnMDK_RDVK1Se5DTQWUz0dGTX9ijEk.E21D913NxC0CvDmXNlU7TpAr4fK0xKoov8wf4Nyv_rY78.0d7yc_OaG0mEAJIgDvWzie3Ptm0DnZn3mpzyrcxaqAyDAU9QOBt0dvn95THKMaFQz8SmBlBWq0KPNQndTQ4AcrhXOr7ak2CnMB4oeebSKxCsd4oSvgEdHSzV4B_.ugawPEkbJEaqvb4tiWTjUyMs81ySh5BxxdHcUHyVcEhDUrloFNHBWF80rqlJe50BvMJ5o0srzsNvE1j2u8kIp_AOWedNwkMZERiyI.shH0jgmK2P8lcca2sCXg4tXeisTaRvIwvjV3oGMQE7fO5LrJYdCwbwcaQM_WRqruD7dODHG4BbRFyUngm8EoCw3B7GxRK32ucFjgE_zHAjBTHRQZKKPX_gtDBr4jpEyy4aVcVXzmRZEzFlyCj1XTf0ghNW7poTWNWg",mdrd: "0FIWNqR49uINl8nIJ3gJrYNUrRia4PZGWZN5FqV2PNU-1739222149-1.2.1.1-sRePIb4201xZYxYLJwPkr7xi9EZqOuSWMH642Y5P.6kZ21tb.wBgTCZHEwh17uOg270rBhrogMs_LJn2.M89RAoZgjYfVYV_aRjYy0FOWnwyPU4O3Rpbx0os1s2jNR_D2RC8oASy2LHCeTy6nDCSgHOi44wSliuMEGHo1X9uGCaz0OqiHJDBRYeIf38oc2tZwb.z9UHHqD9yx7IudqJyTDcOj1LfBD6EX4ZJHC_8GRMfRTOsz7eLGp8V5Dv5rO.fHrSJENH96Yi1Bh_eDmQnvNbJIujqIl5G2X6g9FW1QnPrNsmAkBZ32eR2BONU8ycCAkXsKlVpcMxPDv4v7zNqxzW1Wp0uSXkTaAopOM6cN96_Y2TZUiYd0KonEoBIDiYcBCoXjrOIGvcIDbxF65oBIaa5cJ9J94N4z4R4PdFT.kWBNrDOIh.6dAxGRq.2sQoKBExbnIlBSdL2n_ZiobUOxwiovOK54gwemOz_PeqvTALSORuANJP.njejBxjPRU4qREUi2puOLp6WgQ_JX.8OnnGN8nWWwIgXNGSc61PsLCDNLboRX738BGz1e.BiFPJP3GHeuUvGqcCK9CciQmosoAJaj278W1Poc6PEkMuL9mKPhR4UOf_pPl_Ww8EKdm7uJW4y12wneOEIPkzPVROZHNE4Juw_VtmLJTOrFjEUiBGmR6RxWagi4u1.lkgX60zYfvj00N8WhXjbq85NH85bFN8WSfv.w73U.SIxpB_KPb6RP58VDRH6buKX_2NI.uIPQlenQjek.M4RwbgY8vfb4fVHSuf6n9iPCJnieSIumBkOiCZomKtXdazPT02vKqGI2ucLU5zf4kdj9CagNCR8CVpu.L82FfB_UK8nGyBvOBHD4hyJvfcAjzLG.rbcFYhqqMFX2Hntyg.jLVOCbSv38dOh0Os.ksCn3bb7QPz3fmkCTUepBH0Fvw8rbD1a6kPOuVwgkcMlYGBJPbBfRSdQicc7t.FZP2NJZ4K7qmpEMcRwi3JZzXRltAbEbzWeX5HHJwdtefiAnPjtFXO0DgguCTtb62WkJhV.EOFeApq53JBaRC5qH3yhUcqGUlhCDTcc9PwqlQv4HRyCNd0S1X8DQxctz7k4XLfWac4e25QeTmvOd5RVxxYlG0kkGAPRzEmMzjLWHj4sxidf88rQU8dZvslmo0TX_P0nQ81DAHlcwK0JZEgfUguTDvrC.XP0.XOEcmcB1789n6J7mqZcHmzVIh3W5jm5Fzk.5aDBr_zgc6WewTWV2YJc4_qltaZx1.Bz30J9TdxchMbCBYU4IiUTbLSKGo8qLwdkbsbgDj8UQNsvjEUB60t8XNTE4lr4p3IiflF4VDOTwEhYJMWMIid8XdGAzBl1Kp4hAcI2vRLCSprd3jmLKWf71eVuABLoaa5ZRq4adp2Af64zWl5U027EVr58ie7L8Gct.oLojONl.ssjuyZiSxQokVbo_9MQ.LAZyql0BE12esQY4fiaYXY.n9F8fANnMA5FmTTy_BnAuv0Sl2so9xhVQGbhHM.gmvpwt7FEaLA4kjFIUIpYVkEpwSFvkXQhRP3UPWwSKEdgEo8q.xKecTXyG.hoswBXncFgUVEJqjA03VbmgDjhx9WQ3FQNFD5rjnusaEQfL0JGxDZQP_cnFyk6_rPfvF_kfY_3AO6d4pXfwGXjaiUqk2hj10gjvmAoKrevFT3s9SQs6OZ2dyh_dAIIN4rE6fY2HBjLwV9R1Q0VTsihqQAquhKWYDHpNZCYwTl9siQr7PeSrLIa2guQY6EX3z1IOg5uTbIUzQk8sBLC8nMOy3EoKm7YKy5Ror9k21wnYAa9uDKHY7x5GeJt45vZhvmpE.SYBWo9"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ff1de56f88f272';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\/2140769538?__cf_chl_rt_tk=9J.bvlxCZH0NZ2PuTYWb6lPbVimS84Y0hT5VnjwlOX4-1739222149-1.0.1.1-raDURb4FFJcBOHA9KX0L3CDkM9S1EMR_TCOjAzfWrRc" + 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