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-0748931256-gov.caltech-edu.pp.ua/post/2046913587

  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-0748931256-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe0fbb49a53b96',cH: 'oRI2GAE1fAQjXlBKRl9qiGPoU1VgU_vD5mS.vJdHdvI-1739211084-1.2.1.1-7YMfWhQFkJj5.JdbzJb7ToFD1T7BAqAan0FGH.1grBYA5slinBTyKH54EfCCV2vY',cUPMDTk: "\/post\/2046913587?__cf_chl_tk=DYvNdB1RmaQJAzPxnGtFIyrRWfB9gU_D_IPFAFeaY34-1739211084-1.0.1.1-E7XEGBnkxmnKINo5qoqguzi4k2HH41nmFMR20Q4qSmw",cFPWv: 'g',cITimeS: '1739211084',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/2046913587?__cf_chl_f_tk=DYvNdB1RmaQJAzPxnGtFIyrRWfB9gU_D_IPFAFeaY34-1739211084-1.0.1.1-E7XEGBnkxmnKINo5qoqguzi4k2HH41nmFMR20Q4qSmw",md: "X0skaVQoKtw7wM6gxscrSEiwIfN9GWy2KRcqQZBSbnU-1739211084-1.2.1.1-hmyAt_wPMNF4Sivp0HfImRBUZqSYyvJOMXluvS9e18zDZPEqn5cBhjwxh0Trid7_qBgK0IffISWLCb3rLl934GZptoEpQkYpTJv_B53MnFFkp0C.oGWGK1.jCnt.9prwSra6.jU6lPTJDx6O2GmtlPyofYHWl_tEJ8.bwQ3HG1.HrYTZJTxaBCGcFafPK7nOxtFc.Qu1t_rYSn92YAlcUniXxGRnHk9pVmExqqQpdSGTxWnNb4ezUD1fJ5Y7HfBlB3y0ZHM2iM_qntlpz4_YQMQBmxxachW3dCDzanSgwPQnRO68H0tV6UWUh37qEwavu0XByCuYZ0Yj9Ig_n9VVoRVIwWkdW.yvxiqehkYwuPx0pCZ3Oto8JTRP1W6bE5lyuGVuV7_KDQTa3FUU8suGquy_wviHrefZrFvQnHTVJrEdQsf.Q7EvjrDyEd8PpHbShRTSrz6WGLizLMRdqzfZxD84jvpJdPXrCRYK3yCqeFQA4p0mwEr2TDbhh6eFOBYq0HCzXUyusSnhxB.Mi9vWa_rP8hYkPUYUHyUxRuIjN34aoZptPCIFsZr5PHUM8JFfbaPRpwhBFvOXLYKPsfzcoDVsqH2qEh6soXyBKmxzSoeoBYnByO7fw9IUrHP6wBNgHukXLJpSTmAkrf0Tc6OmLiOsQaYYjBzqyfetHPqzltaAALWEjcRyrn9nTQfkiiYV7GBTcX.eVbxA8X72bJq6K4EzStjlzTn56wOC6ZrJlhFWBnqFUXmDC1EOt10K9jPvCJ965Km0nbMoq5oJVlm.n.0rUCONvD1y46XCXBSRWZ1mA1SqEs4KmsOc6tlq6wWfxsrpdQBCWoEACrHHi9KOQ0nvV_QnlkrUDrSUWnfV4qhvuWOQyuJZw0w9W.rkY2D5SVRfzYo7x6bO1YhTz5nAXomxVztfLayM0RqJYLNPvI5XIFCAcYC7RJ8uJaWk836.rcGUtDBAofA1hwq67.5kbotrK29lWWmz8HKXd5DI3iMB7wENnjqK3jsTUufPv1TtnI1IQfm.6jwyVwg42Zje8eK5vqPHJ2IBIz_X55AqYgHkfn5nb6jcmAQdYe.XDIvVwq4IVQdKhLCABRsPSlvaY8DURDipmZ641ZTItDyYBQ5lApzhDfAoyFaSlS..nFOSqYqm6_TVPS.AEdsUYobRKn5dNW7_bXv2L11c1DZfkdhYO23ucHAch7BbvnAeZPHJaVWY_MGdMsyu3X_c01HzkIOX7U1TnI47K._Wv37XZ024XsxjWbqQLjr47304WqqpWoQPknyxTCVwWwG2umdOhFtlPCSafreUQxYwjTDUQP99riBHepYWFhgLwujl1GbMVSxFUObjx8VWZLeriXaC1_ciKpAs6lmf1atcL0CWrIUplfhWljPu10lsSSKRiDIZHr3hfh0ZjVnDC4HPeWFcPWhYhyoIU9Fsw5hdfahVGiLcgWCkf2SemvokhnsdI3WcJcUwTtX5kNOBwboKQtoXCCWkffzKgpry0ABZq41Io6kBjcYPzzndHyCwAn8PpXY6QuJALjVCIsDuAZRH48P_njApCH6ycfVxEDtWwdffq_FyNCzOcQqVgexMij0oiBF1gO0C9Q8.ars5YacC4_JNMnFAXBsrJVknVICetW4nqBn4Zpkv4Rn4qRIEN4Dbh2hn7B8UnGvrBG.q934mDMhTCnHj0Y1WaccckIQZgYw2xHNLMwQI6gnjYYZjsvQ82dld1dYgJFkGYWDpY7.sXevFG0Fpxm4NxVIx4ny_6fe.mtcnJzdlT_NR1tJ602yuAagUkQCv_SlIqCF_dQbIR7qLHgxBJth7tL4o8k4DXn17BmExkEplZRgaKXuEqwvjAnm9jMEg2vO0KqJDvm87msQUzi3x.rC99YHRE.B7FjyMtvfjtE9svUi9QLo9wKRgcxiZu5w_EddEYmsRQin5LFrpm.NKmgoDWebtY3RpCXzzQbCalzcfvWf7zy.RyUhYLnuL3wpi78FefbKsqW26dXRIgzT2gwD53X5yC4zVnFXQHq4JHUq6lnv2uxfyLmDD.h3WN8GYdI0WHfBD.psrdgku9.PNaKgGdon_tcnPBZ2sH1ksgdtgAiLhOlLph.hqg_292ZRPFlwlgAkJn6ZZiDSOQQP49u47NolLaFzV9n8ehkKuw1cemwBPeKdESf3pbqpnC4VrCkqgCYYJdLsLVS7ImJ6WDIn9NmqZgq8O96ZqVbhP4bg5gxxiut5URO078SjAUsd3Zp3eA0YF5fvdm2fKMg",mdrd: "V6oETnWxdcPUEeZkUv_qBQk7M67N4IK.byuy9muDTHs-1739211084-1.2.1.1-AxTAy6AkoXxnuqliCWaNx4uZKYUnkAXrfX1s_q_WOP18zAERYqLkNsxUt25R_QBFjB41t4EG7KNPPAmfg.7mbZUTLS0tA31.nxKJuoxTyMhG5orGrqWbHDp8oByvJCIjpuqaZnSsGoYN_n8HTx1Nn_U7TelGsk52thgqWXWctmnOzm_6utrkbaMTha5ghyA8jMTS5cHQ7A_NBCt.R._B0Vlu0yBknE5y_uNuP9i3cblWX3keMb261LcHy9HELujuehWiN0djib5IXnwDli4WjBE6DrZfSk7cWU5bSFsX0U6mrNCihhAtfsgFXlnu6jMpZ5HvClN32OlyLyLNqcKROVLTH1sRBKl5kjbHDhdmvxsBkaf4EWj1j3gthglllbQ0L46hU0Wx5IqGsrbXHThaNofDVYbMg8wZefUtdZ9vQFADYgYbxQBgZ4hIi1sSNExGq49V_2eYws1Bpv3snxEt7YUPXb95SEJXA5rtwx9O1m2l63lvYmXpmvRbqccvwxSJ1Aejk.WVTXOklyxR7EyRDqKgpl1YdE7ke7.GFBlLUPvG.f1uoL.MzdQv4K2q56ingwq25SLOGEZYLlBbn3p0wmiWfX7O6dpaHsfEzXq3PAHoRW5bXZCizpo4Odb28RdTGfQo_yKQAJw3jme67jyMOL6bDJNhZUkelvgCFkiNBat3NvkDrcwsoEOqpAGIHE4FW13W9hHHjcPJ1ECb8RGBSiH89EibMD09jNCsNCZY3GyudWqLYyWwKn6noQbGNSNQB4TL7VFDqc9ghfVvN1f81OL2qdG4vEHXIcxRwyvp_ZC6r98DFTZf0iXr6B1VBZUNZ0NLAhYHDog1kiJwuu2s.1cckJOfsWhNEmKFhHZWVTupdahpkUT5FM2UHKd7ObsinX_M.fxFYOe48oWzy6uu0VqsD49suDKDEmgaaOvw4OWWQ_qrr5Jl0JBm1AJ6Ek62H_mqwhoAd44vvU2EcGZuY8M03fz5N1uPNqnz8h0ZLxOyJj.zREHOgdGHb45WQhVJl4DqCRPiHgjqZVkZQSuJmY6KeHnhoBEGIF7Tw4t.CDGFiJnRPRKApMolmVYaDxrpfR89dKdIAe3wxz4UJF_0BaZ1CVmMeu1wCMr3b1ndgjhr166eGNZQeZ0u7T0heOkpYjBKJCIEftcTwLH3AYj4y_VmeCNLs1MCBO8b9nYmvE7HVQ9pqaaNatFcUL7r.hgFj7.PZHAqcHzoPPpKoqNlIR6fFZlJp5sm.yODGYoeWmnHscYTC.3k0UsnHAhr.8j2AfuxKo6E8DOMnNBuVgjIPMMphqJWtyLoMdIi81_cgzSqwVu0xgXTztPwFwoAD00b5UffwgLQKr3Vl0VmCEu5m_SJoddFPgXNXycFvZNamhXAg5fCR0jWT.geqvV14sdcc_WLb3i6kScpg4azfPcqD5dsJlyo_d9_MTH.83yGnQFu8O9ewbW_R3acXYzNFVhCfxkF2y2tLmZZne7WG0EuRmiL0xCoLiU0I6xv5RIEgHisjBEViN76PP75EAFAiEHQecUYGxI1y001Yr5MzLwFpP9Yd3IxgcApriX4W9PfpdOQ2WXisKi93X0U5FUiQDm6YUstFAv1YfFPqISyUJqWwUeJnSsYtYkGKZNajW6.6r.T18d03aW_9_zKAmJc5aBFwhIrfxAAW6u4IqxI.vIyce65s7oKL_tsL8zM1aLzk0c5ZU.4zNvhljUgs_LsOE2RlPjV7pEtLktWoUjQQO9qLv_1JPiDso.ADfKZOFqqjm1Ea.iIcvxBvDDvwLSKFMpSmeCOD6m0Hvk6YV52flcNsq4e2WllJqoyIQWAiFDcDu5izr4G66nSgGWjTLUFL9v4"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe0fbb49a53b96';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\/2046913587?__cf_chl_rt_tk=DYvNdB1RmaQJAzPxnGtFIyrRWfB9gU_D_IPFAFeaY34-1739211084-1.0.1.1-E7XEGBnkxmnKINo5qoqguzi4k2HH41nmFMR20Q4qSmw" + 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