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-8029635471-gov.caltech-edu.pp.ua/post/8029635471

  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-8029635471-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9107abc1390dc59e',cH: '4tDieULVQkDRKImHMdqauJRQxMVFQLaH.SEiwS_ZWmI-1739311846-1.2.1.1-YbvLwOFibNAnWWPkZmOOielD_OL1kcMV1dfedR2iYwZNfSk4l8MPqWeQiQ2eOWVx',cUPMDTk: "\/post\/8029635471?__cf_chl_tk=Dg_XXxVE2Gc0Tz0Nu1xRyHlt7nvReWNqsgQ25PQgmCw-1739311846-1.0.1.1-A14FHp_cRkCcCmYhFRrnSGd7SPOwasswgWkWZ8x6vws",cFPWv: 'g',cITimeS: '1739311846',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/8029635471?__cf_chl_f_tk=Dg_XXxVE2Gc0Tz0Nu1xRyHlt7nvReWNqsgQ25PQgmCw-1739311846-1.0.1.1-A14FHp_cRkCcCmYhFRrnSGd7SPOwasswgWkWZ8x6vws",md: "doSdvmofu8.tiuDwyREcuQtoq1WTztt6HWSaq6PxQh4-1739311846-1.2.1.1-0PLdHA0FBTQkCPvdLzbDaBPVeHbppq2GvStq6viAtG_05Ngxq0YlDsdSnj.vSKlJ08xUowoX.b0qvKoEdmPu7ePWPYxlWclzRWVFGLFgxdI37CHNlLBZj4Af1nXG5CjLT1efaMGNmjWzQH0YICXSFiQ9CncDRspvK_8kCPloqjUdgb5DsPlNL.tD2wLacb1RcKRgkedbW5SamHhfno7XvSZlcILdpyreWqr7nNz9HkxHBTL16BxjLFGoMQoD4s.OfI6tpVBCpATndvNyaDaHD.qUcxshyNEx987i8Pdhycq82OGRNc7g.jCXrTSKOiYKuuc1AlqIdq._xVRkIXhjO1wEvxcx0HONbRA3WrkQ4vDziGATAByqqu9TFqm_JDuUcWZXoB0XVpOtHiFe7x35gHSMK79exXvymDhQ42wsrkZmd4A4D8Q5a3BDArsQBTMxzbIICxwokfxy7wxb5pFAyYNnsuWB7SwWzvXAnc7ZYAozBpB2j.GHXIV4J7IJbMuVKQp2iC0oqwYmGBRDQb4EkDsvDGwlqT9rSFMI3FHk2LSFO9oXOceQ0H9Yq1n3L0B05QCGruCe63fw0QtbO1tsnjQ_hRAwrdl8wgMozwDR8L8FGvF75jDij7fVMin7ZpFfJubtoC2.blW4A4DvFLGkrjYxAffaL5A_QPfzrgXFsFZRv2NiZpKbksZ_D97QKk260n5F4k0fWaU9JBMwVcFXdO9II8g80jN0CB3yXxZ6mPL3M3vLdt_kWab.aUdMfPIEcOn.01FTRaWLhCkKAMYkIj06KEKdvOBWrxm7nm.L6HS0e0ABftAHLMiJF_hqS4ISLyR7tT7lAUksWF0SXI3J_QjPFhhBFeJLczLkyA1d8tzkS9MQbcdlzYraMS8hIz17x5JMdjc9Yz5lA1LUNoIHaHyNkbV_zN_31_7m2F7quIUp2Ord_63s8GUuccg6uoH.ps_Hq1yTOEJsnwS71xuQCaccTO_IlX_cOmLqQDO_fIWi.UkJwRxTAoF7zLMBOCIvzwyhsBMCMo0oEoK4aLQLMfbwOzzYWy3c_XTQqS4mUYoZx4gRDAEJFdKCnOFeX58Bd8qqZDqdYE1jx.ONy3dau195d9ontIKamr5VDNJ9jExkeaz6e2hWjUqaUvclRYjPzfvzxnZ_WRocQvA8SmBqItE4yd2dSpMGrtUGkRsmcM4x4fF.8cfwVe8lKU8h9Z85bsJCY5lBUFjxot2Cl73826Q5WmzlITUX5Ytry2P_kkHSxI71KFuiPIk4tpQLwdl0lHAAF63pCWzw.64uEsAGFN_T0dfcBHmsEfxSryMGejc57R1ipg.KUZO3YuDaOTFK8sEU3aw7gcfe.Xd3WLPTgKsg8dp3.GEbBoQvV0r9jz6X4SkFK.xuQIiidC9gbHsnLOXpmO4yqkT47M3g0I09ZEz80ZAQp57PXR_YzBMsP1x1LWLZSiycGd6NQHDejDxwToFPdPPVIHsHmr23PDFkvtOVHoQ_n_Pe_ale5HGyrcmwMK8r0D859KF152p00xBJERVNGzgW5Lpb2x4XdLaCF3G_rTn.MxhoEuVUzZkQ.1Uup_WUUd3_NFgn5vHdIc56JuB.13PARiARaopvBjbyLxey4ttkt_f4oVlVXgZdJG6VFj4ksbCKCl7bGARqZhgdP29bgD3n03yvC2NmBjrbiOIcUjaSKpQuPEqEr9fze1ZkibXFyKrDq3l6nLlkfMguKCayTU.hX3tAfFc0kJUyutL7ae0bwh5DvG0p6oSYEMZmG3WWWW.CCGXbBErjrrtAnh75kzF3vowngfnF0y_8JYr00ZumyXuV_n4unA8Uns_dditoszhiSowhkMSxseeXGeScvp6foL2QTLzEV1x_EJXFcHkuqKtgk6zHu81_TCssQw8uvWn5jY0Sv3aaqmVWK9P8W9hKlzUfDhC7lmNbhjESnYqLBWcpy6.F1A0cw3v63LWlrq6RzMUNbA8CXe1T1cGScfKGuncta7IQmKmDj_Ln2oNImTy6bbqyY7By6gfoBK1NtQpHfhFgpM_P4CxGPFtITDRlJLLZWSpp365LNELNTHqS_tGQcIW.ns1cXBjcxeLJARKJAhPI_NGar.T1rRJyatkeE.ViOT2BJ0_EFjM78QDLRbNGVCPzCQd0oEJaHrv5IOoXABGM.i5cDxNmXQKGrjaHLT4eIV5wAPf0OBkeu5JGsMPO.DHRrnahEEk_xd69QS_AhT00dlo.Tn6.kPgjB47gNKagk3KoGf3pDQ",mdrd: "g5nI.fOk61nD67dd6AfswuTb1QX.VExfn_yFdI1FOuc-1739311846-1.2.1.1-2POF3XKYGpTJVskDp7crjBWsEEq538h7krHpaxZxvU5oDyY9v09OieT9_tABlBCcoNUg9Xy.btQVKPAJRBuLBeQPErv5JGZDhZrd8RVnsqtYv.Ua_w69DDDPtQB3q78xow4TnXfBxmWf6mSqx_Q.OWtEJtWh11I_OA_FHotw_7FnPZtaRl4IEKDpHClvot55UBNtyTfPtxcBLH3Fp4zqt9cEz1NbIlrZx3WDHRbBwKCNva7MxTpEV2mP7pGCS_1GJJ7yK1aE.l7OARxJD11qcBBAaVRjL0SVwj_8esnobscMKMDBK.7BHQySQE_kSkmvwAA65ZAPiM6hGopj3Q_wJmgwP3ws6X9pq6gFg_YWfV23y2G9p3NkLhLsr_4Z0VO.kZHvSDM3.rEap7ozY6W1PWEMS1xlEeWv9GADNm.VPb8T6NjwxaYyGn_Wo0QA5gjR_5NGeI0co_IdpzVTJN9779xD2rtnpQpePXzqWBd8ly6incvg_iqtIDrjafijuHaasSD4OSbv6nEi5YRl.RKu5QRJM2zZAehLt.vF7OBxbG5NZYfHIVwxlocqU6xbre4s4fUdAb9AL1y8G8OLnyDCYcugEFr4WMD2tQbBYwlforZPXy9IOwsMFWFPTbYaPgCTKwZ6L5LBJi7HswSO6Xmmrxw.HTTKJOZc1ZbTMHNkdWP9.McsZ9dLjOE5tW4ehr_wyMnFGX0lWhz3wcrn75hpGwQOuS7pcWbRtz7UHNDQKP.0Pmw5nTPktBvAMqeVPhQQIJ2IyF6ax5D1rvsb.4A4xemb0jw.Jt34YsIHlElMTlO0rV2q5rqQwrN6bPiqFTgaUxZMhaP4UOW7PAp0KdNEmFYXkUrmiV3eoY_lXUbO_N4YrPfa.fIbZQtiO3b8t0_.QNL3rqOGTBZCYLEckSXw_dzpmNh2YRaQ6rU8N5y.mLNXX90XZJYDArzonZ2HYq8XteIIUHcBfK3i2Y2V3Ezx.M3Zae..pFz1938EHf6sRl6NbR4C.Af3Mp8nVB0JbaLwCBN6tI5yBMtNiE1kMz7ctuiGaFOBrtk6vHAEfQgzc2uO5Tc9Pfac5fgGC73pI9KzNfou454r0CGnkQEPyyCI7Muo1vqK0S8tfb3wVqj2B8YTRucvCdBL_KuX7c8s5RnLXIAfnH2_lbssNdzq1a0NfgDHSLuL9Qc8aaBNhvVCet9JvUJwdXYGkemTRki0gjPxZFbOYtWO29W7QbL3XiUI1C8rpAtbsoRhVIzt.C6IT1kD8k_w4PzS2bBvYAaSQwAtCOICRlBUXxgGrw9vE0ofu6POQprns.ty0TxkgGqVlm4AO8gtXUJySvknM5.aw6urXYuYKOmggnlAltq6gVd.3K6rNO_bPmlKPJcC.a1eV_EutjJfvzT.yfqR6qrzF7CoxfvJAa3gS7tVV8GlN2r2g099rePXJJpCs8WJH7Fk82jOv8VLVoHCFuO5GgVE8w6isvmxbsy.lbQhdGLGTeEPGLcQM6CTH_JIoDbuPipjlIvHmvY5qAvfjtyYB8PCaVnYjQ0g5OuktQYoPug31JBedmCCXrNIz4r4A2lRPxqdHp6BrUnrf9KlCUBr2eY6sRRDjOzHgFcW1E8113ODJIKHYZMZbeq4SZ2iZLl8kKpTl.ZAg9yDx2vRakPT0Ubb5_7MBGE.ZOiUSriuGW5Ig6rj0QXuzbtAxBs6QpS4L3Vp2lGeD9leDXQF7FaIGkwHUhdXTzFtg3QEKH6dIXN9BnmYk.a2gpt1xr_7X1_rkaaN7iZFQDyC8CWxiWZDM9ZvRTGB7NFlBtQdK1cF_4rfN1q0YLRL3tpOEgwOufmdr2TFFLI1By5yX_tY60gVQOVlzAxg"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9107abc1390dc59e';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\/8029635471?__cf_chl_rt_tk=Dg_XXxVE2Gc0Tz0Nu1xRyHlt7nvReWNqsgQ25PQgmCw-1739311846-1.0.1.1-A14FHp_cRkCcCmYhFRrnSGd7SPOwasswgWkWZ8x6vws" + 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