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-0425691738-gov.caltech-edu.pp.ua/post/0425691738

  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-0425691738-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910ded85ac7c200f',cH: '8s.hWlvnNgYRrVJTTyUY162vOvIN5eh3wEx7.8isx3Q-1739377454-1.2.1.1-ncNzdAVmzOcEEErTRx8nPuW2Afht.eXHjWOBxVNHpHrYQrkS3RSmUTsobUs7HP1e',cUPMDTk: "\/post\/0425691738?__cf_chl_tk=3fbGoK.zfQFSB.vv1cw.v22NRP_.eiWh8ztP44A4.FY-1739377454-1.0.1.1-ayZ_YGbAmkL1LtMyrp9mfkEp_77c3Qkbzw6FvoG73IA",cFPWv: 'g',cITimeS: '1739377454',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/0425691738?__cf_chl_f_tk=3fbGoK.zfQFSB.vv1cw.v22NRP_.eiWh8ztP44A4.FY-1739377454-1.0.1.1-ayZ_YGbAmkL1LtMyrp9mfkEp_77c3Qkbzw6FvoG73IA",md: "Xcy0U0cn9Ky_1JF7qahtVjl4GAJwPMwtG7pTFcUy_Ts-1739377454-1.2.1.1-qHizw_dpxeaUil_sve1Z9VoLZMDzY87ADoi6XkP88DvPppDh.V9.2w8XIy4yJmgejrr_PIz0HgzxumDrIz5uygjaP2LJ_vBF0qcl7BQQMU2HyJTMA0DTWXraGH2.Prt0VvILO2R6wuUDT95tKoG_shW6nG0Ej5xDdj1oeN7ed9Tt761M7asb6h51cK0nwul26ie_s13ffWP6Payg1LMs9S8O0LDmn8HfFTykEMx0cW3m53e_cYeMDbJ0RZ65qMr_9cN9n9EiFVD0Uy3H9SP8m4dmfA3miaI5k6fYJ0O_Xks4JR9sfY9j.yn9fwjXG6CWojcPTY9Qx6mrWDHNPCSpqzzSipfOwNnUO8.1V678nC_P2CDLysOSufZUnb8z7SdowohxX8Iyqr534TsX1rhdB9x9L2691JI_WAw_nP5UqVKT0x8wd_RKCGMLcJ9Rys1_nhSc0IR0VTAKlPFdJ020.rersxk7tBGI5UeR9FiScm1tW6zXtmi_XuqCkS3vmSssxe5z_.VKRcMnWDqwTGpSc4y9ZBp3Yu3JpnQ3oLdZhud.qUTJsyT4hNJjwVgtY3b5RwbcvtXF7pX8ZvaEiGxodybSY19TnTd7nRWFWtsXZ.p2xdxWgONtSUIamODCozIka4MWvTq0JoG8eDOuPrQcKLtcZtRIzWv39Da_dNWKFJ0IpgAxO5ypbLsGh5PUG8.iHDw1jyDTDoO5Chtqh9B47JbIlt5Izp_G67JMgyzPTHyHolDD5ih9UdButILDYmQidoDGMFOO6nk43PmYFZ1ctMEYppdvWxJp_1jWst_5R033gDFf35bidz9CZf6IiTV.szgnp53fY4y8Cs9JwA24KsfL7Nib_wv80pnvXT15MkmI.5yLjSbPYxlIglDd3Ze49MTlrX..wicAVeDzoRRskFhMiwuyZHaxUkWL6KxPC_buUEceZ4aneSb5_o9pKW6ry5fghHqwZjWik.TcE8d59P0ye6hf0_Hizj2xhuvhkgfnc5pV9m7gbJxAd3Zj1Pf6T2xoLoHZ6Q0QTG4ppmFnf_KAYf6v5x_LmANyXXtc4Ya9NMZs1wqruQFvUTpO4V5T0J9MXdwugweUeJeEzMgLSiakTzhpfI6TLW7eTHJ3g9eZqjh7xxDY9xbdjmz65aAHBGttJszIHN.U3UytlXMESTTL6mvpPLIZi5KsBzoWcdgFXxTyNLpp0pVCbYDg.OBH5NRW5.j.vEFbmpZtFhT7sQS_9QD2zbmn2IKE71HAN9fxYoWmF9tgIVBqIGFEVmg2dOo3GT1wgOHfYjDNTa7JuMGqckuMQ4_V8jKC0.BfbUMsYR3cLaHDP3jNVgfXOHghMLMVjrxwluF_vYhUMgvcn9HznXozsti.PtvPUcAtdgomIfwNXeM9AG2pgiUp3PB91dapRgpFb86mRGthvlh4TJ1dEBDBqa6kqrcjw4bezPeO1LRrZ.VZxaHPbeBsfqcnglpYj5NaYrhHfaxvqVET.KatRbhg9eIL70pdPEU44D7UZ1qehXkNdQFpQzkuOCKtl7STbdF7pUkiwcqCN2nFGfoEo5LRpDPY3OcHCqveMcPkZ.EJDEEoykUeVnGL2_OrDPzuUTUfoETIVYX_bOrC3MWLDse5OmRR2J5wXVxXaBK0WCB2fA2nhZHIAjkbCIaKerQEqN9pYHX9ZScxGdI8Tb3xu9vvZr8by1CVhaOBWtTmKNOa6eau_0PfX.M8ibVI64PZVV_AmjPRJ7FEBgVbQzsN8MmTuIqmSNQ2XE1OJmdUx88IxsW4m7J5PBXWrMy36U8PwQ2obhcgC5ISwzReVPrkudIyhTYJKbJilqr1O3cYHOfkWB8_67g6y5rh.91bt8CCpWbQ.7lE0VqNnYA.p3hWEHtDUSrsdLIJcapIz__VXo56q2Ep5pAtwKL2o.OENfoFsnjhMc5uC6V5UdLzgw4xhsQ_gdZvpgo6ijKc2P5Y1HlvyZ51ungd3PwFUQI9q8Z4SUWxtAqwklgfluJt9oT_cftTh.D2zn4GVIZnsl.MH2rH_T_dfd.xgm.0Wz_N2hGkYH.jSS_tLACvp02kLvONgjqdbWVpx8obwJ1Eh7mMFfVZpAksvVU_CVkTu7BlojzKFzRfJW9CeBlRpSUHeLCV4oJALN1ZTQVHgIG1GPyCL44T3olQlfMzGDMjBTT4Ocd7G35RtB8tMRNjK5jIW6j4HBaey7Fsj67Sy7O0iazo5sxvAv8.UpfxuaBQ8uAZg_Tde7khVw5i7jh4cQrMuQ",mdrd: "tPbV_w9516JjhEPPMKvT22A.aBpDmxBiJ9KRKKV_.C0-1739377454-1.2.1.1-LBJz97YXaSlNTW9FjKxroChsr1sSgHwq.lEUZCC_MeFQffeol6hxh9BQK8tYaBRXNEDBzDYlhaV.D7NMTSPSFm7j.E4UnQXBrbix1wPnStYV3C2HQQYcr05jGr2OelpiFCLbpn7.GOn6vudZGKUB6gkmLKMDF5WahN2H6yXvOlsMi23pp3gWI2cssEeEfvEX3rojDK0HTGD25r1ojqj3mxfmmGXATWI6bdI8NGz9kVJ1xRcdagHLb1w7zAUnJZzTAQ74T4PWiK2GBwKfEbhWFNEXw..5CQNffqdszT6LOT.CM4.Pd_xJDTdv.FPb.htB4czzi2RDstSP.Z8XovqdM2j9MZcOJqoN93IIOaGN43Dl62jxEJrAQaC2t2x3nr6mRc9AtQRZnT0KsmxaUXeFpW52GONg6SEfdzI31VbwUCfjPYcuLEw.o5GLXDDEm_A.Y23Na4v7ZaHjDeaElxS62nwnvIQZcMz.fWFzBxUOmJEc473sSugpGl7FFm6D8oH0xdHakG5gG9fjR42OIpvrd9SajJIkx8jlJ1RR.lgrkHK37Orw2xSvpqM0Ke_FwMhTrjgn_.MdU6IMEusqNeW3Qe4o1rY1wgYJZ5M4U_QHGMx1EAeA_RcXlo8Z2BA49HiVJ5lnlxunU0Df4y_CQOvsGpNdCKzTb91FCoGUXu2jSggzUzsZNbyK9nL5AK7MYFUZmu8SPo0fjF19QxE.LIwA9x1Euv.UF3dtkCzir3JW4.Xp.JqIycRwbbiim8u3fZgKDqI1xCVBqsfAFsNutwI8HGLL39QEed.IaQRqQHum5U0j592rSNpxqoqInv4lG8R9xTjwCuPfYwqnSbHHAzvANKlCmtGfWv9cNkIEQ1mQU3Jc4AglWkVbE5tvi8IFvhNaZyAJjTZVShM_.OZKDpppy_AmOHBwZW5B8Uzxbh89.X9XKwnsHBzLqZ.oXUI.4R8ZJyZJW4ELimBpakawPfWiDZo.vrZq2Zv8KGRMmVUqrPE0iIdV7sJlpFCy_Xs9ipK81eiLXoWVnScE_4mTMkzPg1MrExpxjaYUAuRdMEhr3GuX949EZgx30oeh9LeKkAwlsoeBygjosGthvYAqEAHvplq60C1Nd.NWCXQrWGxQ90IdGtfUrOL6KRXS1HyDL88luwD7UZpuBRMgiRhrUx3qx6P_9hJdNVSBSC4N3mHPzUosp9ns6wDMmLj_v36X3yQmGoEpCy5FzK2Kl2rZJiZswHSxX16cBL5juy_quTt9BMYF320QMO39VTukgWITWBI5Ho2__5q_gWySuHc1BrCFXtKWld5TVsT9bhLWeA6zhbXHRPxZobIz95SIK3rLkvkGE3oFzKRRzdhKsz9UBbmCWMjIEhraROpKzW8I_Xl81AS1BMKwp6TCxaQIbd95Inwtphg9peFvpb012WX0L9Lptiv2Wd.FMiTJht8zSpfLjjEemsRzjS37GJKLBQZ142f73JBHo1hwHCPawkJGt7Ca7vw314KDe0ZZBBmxmUwbeU_fPBhr0JnxoXfoW8jBwAGGqdyN4bD.Zyn8Lqy2ca_pjRyAMCvsiExRJFVUXhEny_N00LWIvhqP45sGTWIwx4yEPQT0e1jUNy07B0j8z89QQWClBBMt0H1sSLzgbdNNLTGPPb2aDW67VVzCCNnoJZUJh8F7R9EfRBBaUGC97cGNOPxUglqIo7jqEYs7bDK7eWZGpSMLkYY0.GDsaxDOyNZqgOHCU1K9z0RlxWNdS8Yr4tFe8BCOSsy.HsmgxWUKTwe02P.Jy1rdYZzauMCXhbIXv603uHoxidy8KhvL_kcmusQyBF4Wb.gdEP2kaxLUwmV6hjK0n0OOG4WKYQlxAspA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=910ded85ac7c200f';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\/0425691738?__cf_chl_rt_tk=3fbGoK.zfQFSB.vv1cw.v22NRP_.eiWh8ztP44A4.FY-1739377454-1.0.1.1-ayZ_YGbAmkL1LtMyrp9mfkEp_77c3Qkbzw6FvoG73IA" + 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