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-9815637420-gov.caltech-edu.pp.ua/post/467527603426

  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-9815637420-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe4e7b2c8f82fc',cH: '.sKxci9RAB6SmulwusNir0h18M7gwqZF4eMWuZYBiZY-1739213654-1.2.1.1-hKn4oJm65MRHDIy2pI3epZP1GGXGMWEA.pm3.jaxTjPFlRT.yrrW1gRHj7TGRiDE',cUPMDTk: "\/post\/467527603426?__cf_chl_tk=erZoIlFBcfIOLPcsD7gAO.8O5pflD_rssnaUL9LmVCs-1739213654-1.0.1.1-qCMNmHbmGEMTpfCbP5es3dYRrVojeoFummOP49b22i8",cFPWv: 'g',cITimeS: '1739213654',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/467527603426?__cf_chl_f_tk=erZoIlFBcfIOLPcsD7gAO.8O5pflD_rssnaUL9LmVCs-1739213654-1.0.1.1-qCMNmHbmGEMTpfCbP5es3dYRrVojeoFummOP49b22i8",md: "FQRxDuCr9h_Avj9zt_Fsm0VYvvsK2bTm5_yPeUeyKsI-1739213654-1.2.1.1-0WdSVBtKgjSSe9wkQ1OtW_XZofK8QzYIImLjXW8FU7vWxJyIMX2NfRS3wNWYeDA36hTBdTjiNoLwf78.xp4XHKbOu4.DsO0mUORBv59SMaIehwhdlG1BWLgKaJ6WqWg2DPzwQKzs0mAXdw2UxpDKabtlxk1ia_5rg4SoQDGvlQRODbAwIlOly29PCnr4i2kH8oL.l68DPTP.vOCgP9NvCNz4umVe3bFaHP4OKkrhC.VhlkF.WL5uDcluKuQuSBQ7DXR_Z8FDLyjjffLVT3mR2rnjoIyej8xbLrcDe4TpZRDMQvAMj0Yob_s67xlg1u2STXh2XQrkswi8u.DE3KuwVMWTfCGgrb_2CMwrP9jPd.04cHQz1aUbzuqg2AXYgE5OQSmAXZOibli1ZoILaEtfnzdtUruKDF7rZQHhFHf3TcDVaG7gTjxp9q13vMaZBoFY5Z.UDvJl9_BR4fPocjV6Wnongof0zsta5t29hEwxzxSTLOufel347yA4LZ5GtTreePLuOcp94lj8w4Ch5bPQ.cFOhbWQhLBi9zvcCVnZaFPkrZNQzbbkYeExxonhnC2_vwBbWCkwBy9tWM1WehgebSufr7jtif7xfXcYPD7wvBinFCXQrhpW2y6lHPU2u7IuBOMuSIlUXO72toxPuRle3pITzsqzShocIdq0CnYcy.H7NxGT4xXoyaeDcMkpAD8S.5TMG_88FlVr_n6i6u_9KblnojXwRe6Pb8HNKKY_wi0krlc8rWGo6tS.IP4_EwhRCwaPvN4cJzRC6CgLhaj2PkQjtxKmYU7xi5DOcpSa0RJbB_A9zgAtHd9wPF3zvT_iUnya56hf6Dk8TUzORttnHMXz0HZt28RbF4SoeShIbqIL6JWnfDeFR95gzDYR7LkwMlaWtCqaMCQy9WoRS4_pNCpR7FdhRefsCHIteNSYEOAwBklAA7aevlZQGtxFK.DAo4Pq.3Pj3M6lDbBLilgW0DvtIxCh_pDDyE1hE2YgZZONAXZSY9fuvT_6qUfKFqT9.5kKREQ5hbBFB0PGxwVNMevpktIYIUI39poDcqL1rHKWOwOyJMljdISvswGTsZ2UKKpizEs.7tdO3H0woO75I7tUxBB8Va25vfe2mJN_G45X5f5Y5S2o93AK.wVHeSh5p1h.Jv8Bs0UpKq9m5e5TVKA388jX0fAcFJs3NLbXAfs49VB_XYjCjlVceSjHoMsC300e10so6OXawijEGPApki7wWgQWAc2UKGtYSLM3ytltxlSEM1H5jj_jro2cGwHmVlgagKPOhm8hkv_MjMXzDn7lNHD2QcB.LdBu8oRbNhXhiDuxZfxprjPVxbIOLym_EgZ1iYW3CWykSfRDZYmW1vA7WaOlhUjGuJcNU3jRDINsMg.RsuauhsMIJu1dSPlRNuvL19_dtnELd88MK7Q6b.dLrYKmpXbzBi.qcoblh.D7yydkSNeiG.GusZ7KBZmPbe_fpBR7wdr6F_pH3j1NLRdmnMQACAp76POsrsMHAFRATIG6b06AzK95tmssswLx2oRnci961HMiDLMHStB_gA60Id5KRouzhIPl9jMEsdOfK68bewNHGlom9kJoqx3gFw_5uCaiqxd4s3_OMxF21Rn8dE4AW2YMGpFjSHiib30xPKkYow4GPTd3TXsyCsce3oANdZiVoXsAhWltDjnf1STT3rwWByh0RkGwlPXgAUhrYlNgM.agODP466TXj88EQFBZAkOGZxgPB9f_HcpLZAsnt..o0X3EcKPG2wpszXmIpIGm8jFNU8Qb1f3y0D5jpOErtmxMO2qLihnd3ew4JxhqYGgp788tQKAEDvLOrcH3Bm3hnL_4oO.oyw3WnGB0eED_4Kptg6ES_MD3qc9cFXJhJG7UmxM6TPImODbVgF_B5rH5o3ncs7KLMErcFPS.vwpFId9XXZPD0If3_3YJdLo9kWnxqXO.PomI_TkX2QczZ3GETw5TIsbQCCM.IG9m55XK38jzIENiiXQ.fLt7nmVfhp.F9CqS2MMjn33.tXAq4LOYgAChKsmYpEqQo2otOLoFBMDKKMjU2dOKgvKGefS71pR38oTLHjBx.LgQqrZzZ1vLlOz9w8lWxEk0ZVTVvudsZZFJm.6vpw_xbTAa9r5o2aZBhKGOyUVLMtYiTUFr1agW3q_w0ROno59AGbv5SVvvHgLQ3CskGsX7e_icbPqHxTD959WJLEzll1.qPRKkmq9vlIF5mhSiusKcY0ZUFPakG3P5dWsArvqjc6kQ6A",mdrd: "8bhTk7pq5CWB5mTijLleHRcpQq26Uqi9kBBiU81BkJY-1739213654-1.2.1.1-j2xR5JbwVPRvzLphMNS1qoBytxW7Xv0k6l0Ef_cXlR_JKwYwEUe.VvBFJBkNItFIRMNAJfCktXvLCITJBA50yLRixCMiRa2ob6cyIUB4VpZdLH7Zxi5zw2NzuOUuBGT3FD6xT1FSXovrn2zHpXaenzBlWfstV7GhiXRSoNwThBoG_oTgFBjX0aZCV.kAtr4ApybPzWv3hiXZIyW15i9qRrCZ7_a30L_bgeMhkcZFgqAmxYICCbwUVaOUTtNGUuUsC8Y3AXRgMuXES.3zvXBv.TO.8ucBekFBhvgGs_Yo_SusFV409H9BbVAi9V9cqBJjJll03LjGgqr6PFc5hpTxIDyfBstz3xdnLYSlxiVEvgfvkIDynzavhTPV2CDqN0GTpGvC0I65NGf_hGq.nAoyjWkmcO6UEczGT8_JadLk66.8T7qYtE4aczEUiCVE5ZGkdrGuWhKjZM2fUqU4eqBbmw5Qs57jTAkZLvtSPnLqtqpi7ATsHwFSfmqlGTrrLX04.DuX9YFAlRuR9xLpv9gEwRUD5Ogc03o3qpJariltp1g3t.FQZybXFAU7xE2SQh2mUDxEKF.OyIPzXTa.Fylp.g1PL8jFlgb7Jjy9ybpTiV0OP5QPJaAqKB8qn0JJLAgMbvHQyIPIvwuLE6SC3pfXU5EM0NaMJgDZJugaQ5Wyyp0fRkuYlZY_46D9FqjA8MBRD6VeDftt7_VwDMSmQY.5C.fKuX9Iaj5BerD_VyYhzyjl_jPqbV_755XIcCPCAZcKUj1fvCfsmRsBNKJdylBi1U2B0direHgs09vp16_j5wp5fRdsOUasCNDSwb2S7k35IwdaaOYe07qhPwzeeUSZ1IWZtCWPoDVErMv9.Jp1zV6gVO0SsioziuoRgPp.rVcEnI2uLrjL7mSIdjGHrvdxhJ9DAmFhj8q0uPWlq7rt3TJ1FQignqe8hWZmIxYG7dnL1WvKtCNB4msnJdLfwZ_HO9hvQFrdUaXP1ea.QgIhh1nBd6hvI2M_qSZUVeTSFQS6qBpvkxn6qh4oXJUr2ffxaStljsifrvTfZR1HivyDO8h4OOtb4oZCkeJ6KiVzDH_7rZ0lw9DMaiSedHhXpQ2zkQPGny.mBtSp1RmYbT8ToITLnKLPsL2xPAp.JhGYy7cbOcpWBGumSXgU6ArhpDc6LOQLQlfQpr6AJt._oPwbZ0p_QTBA0eubjegQYEAzYPe4p6yrUJPJrlDjBSsrtLAK5AqcDSaYzM79d87.8lxZVyUyF9uUf6kdtiyBXRED9eAj1EIPWYRqELNw8rcTe9WnnFsqcAmNeeFfBcxJGI9XKQeZMjtYegS8FML154mCQRAppdZv6bSQl0QwwDa0zpv1SMaFveo1c6KPxVivEqHsoMak.dntKr9QoVUdb8niG7vAUC0wZEC_2Hlb8U6CfuuyNJUJxHk8C5ynrtQAm38TYNZWOCt2jBPMPvEuMTOP9tT.bwLTUm5MeljIL1EwB6BfuVBvH6KaV6dnOxN3mmOx.8L1wCobGvbzEni4s4T6AhJQkdZi.Vf9gvBbJe5RmXE0SPIISl.u1xNEu3MdyMd82_vrfIpZ6mrIq.QwsV3Lqc7mj.mEBHVtoE8kLerYk8SM43BYIXfgJkDDWRWKpll5e0RIgyiOKlIikL5813_e8OPwO9_1_VvlVScKsL1MJg4rwN9eQ7is0GfvqybysKQ.FKe.yvQqIrXsY3bJ1Oh7PUYkdXD1_.UT9_AWRae6R18WkYb0K_dqhoEBVAw5rSesJKXk_N78NUHQqSfIdDXSg_ik7uh3YP4j83s41tmsjHo2T4In.TMxBajpmx.zloRFl.7_Upt5hlb..RR_ux_P.qk9"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe4e7b2c8f82fc';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\/467527603426?__cf_chl_rt_tk=erZoIlFBcfIOLPcsD7gAO.8O5pflD_rssnaUL9LmVCs-1739213654-1.0.1.1-qCMNmHbmGEMTpfCbP5es3dYRrVojeoFummOP49b22i8" + 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