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-5980726314-gov.caltech-edu.pp.ua/post/165051980425

  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-5980726314-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '91012727fba31fdf',cH: 'xGDiPdpn.nm8Vy.MGFqxM_1fcD11jURXtFbw13a_qtk-1739243500-1.2.1.1-YPHvm7EcK1Tw9YJ3cUmhFFpm29zHiWnZn4nY9dMLNB1dNKAxbWErkosA.W9pQ7Le',cUPMDTk: "\/post\/165051980425?__cf_chl_tk=5WWWUFYwupdy6eoGzNKY1mWV.AX7JE0hGr31YEPmoeI-1739243500-1.0.1.1-UTvPeHI_jVF5Th7uYf5exVseFrWvkehQLcpHhyW5rAc",cFPWv: 'g',cITimeS: '1739243500',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/165051980425?__cf_chl_f_tk=5WWWUFYwupdy6eoGzNKY1mWV.AX7JE0hGr31YEPmoeI-1739243500-1.0.1.1-UTvPeHI_jVF5Th7uYf5exVseFrWvkehQLcpHhyW5rAc",md: "NJDJyeBCfCKVl6GdJNQpnDrulgFBnOmOus42SSB6.9s-1739243500-1.2.1.1-uumkE59LQt5ynbf9NSAz7OZVV8FTs4_tf6fRkb_MDVRuyEGx.PioEyntHv0uh.dbhDnoNNtMTS37otLls0s7OeqjNPiIAjDQeV_mbB3fpxtB.rYNk1fOdKnjcAqp1R5YSQ1ukeEQoVgm_.DUa9MMUbn1VJOztxwQi8qMu6H2nlJuUFbNdcRIzeqPiSUEC3hGoGwTNtS1h.4JvH0v.1rGqHQeOgzbKen5hkE3jqGPXfxVgd0Oso66Ygpc8RD5mfFNzQsCy2ERw3tkLh7yjn8RTNPgIW.EW.M8qJqhYCS3EC05XeRmiR8KueF_OaALaOi7N2VSHotqgK5.btS7Phn8Qm0zs8jy0hYoh.DdoBW0GrGWrrIeYyrc5sZ7aU5P2.1cKV6lGkqLIxZsXF0QbMWxbGLjb2qYt9.cdSeJgmh6DqB_XfrBO1_M1N.A9OGmgCClbgbIP6IMolfchTgWICdvP9E_8SNSkYBRQvEEFO23OXXmA64.IKp6cG2xvcwfToJcAbUJ7QBHfIBkfzSRUY3oeeD8oC45SoIMoPemGI3jX.dw5_xFx8MZ1AUmLVsWZrLnsvqWnMmExfsLCItqdyfjomFBNkhIEgpcq1mYlaKO5FLSe.LIGEBFIFAqExGrnu903s2QZLeqqNnu_zvqsSfVYKkX7IvyaAL5K74s4n8MXHsRMeSbvSnCgxpw0jezLcPlylzIdZhGYdy6u1nr6Rzjlxk3a1ycl.0h.QVqF43EhFEjWkv7kDOkBFJDFABnGuZegdPaHpjem1F2na2S8m1TA1gEfof36G44N8zISYwwDF8UJ3UE9gbRfz8BDsSQIYlCJoH1pRloHRE.97oNU7qySOCu1Gls8qO8gcdPDr0DNO7gbtp6MBK2U2MyJhIyIEXrE.30ZMAjwmvVm18aKQ88Elv.75JmyutrNLibhYrX2SaMMcqW5IsI20b3EzznctIXWZ2gGiuxh46gtwqFLCJaezalFfz2X_DIRf5OHkSLb2Xc9Qur7rESlIrBtvFgfGdbPRTy7fx700F.UI8uO_UoJvuLli.98feQq5i9QLf8.HbpCKw3Y7Cn.r5V72kpOMI1z9jDknhpn_qbVpe2aKxsSxrtJS22lwg5aAo6OFC4NrcU.tNgQCJyyZgtzmsZke.f6WL4TZ3_G8908C7ZAzulSlSi0jL3d5Djr05zD1kpa7_aYFLIDF7W85_Dnq7kWtqccDkGmjEIk.P8jC2VN66Ub6w9Ooc8jc4VN7cW6ko57Ne.CSIbvcnc1MpHFTXc6xoaSwsUz4B3gBS7AvIKYt2jEtGCuXBZBbLVQtybd0NAowxg37poYgLJPBQo6gCRQbROxGYZ9epel9fZOuyTCcNzFsSP5xa8qCIpVWPKRJNYkI3drpsQEcthKoOGjUFZ8FrXTIPZZ32cMxSC8uGziHso_z7liTBga8oUowvL1.NBEyPAkI0IT1zkhQHbhA3aXbkkLcDgc2XeqQ2.u8Mjx49mKgiTpc.3sHJhV9m92xV1NJ9Lx8wmMMz3PX9H4rdL4Kp_zCwYMxQ3LVyENLvqX09L_Bdh4bDfWKZ6zrTgy57J_R3_TlxisdBPflcxqkcH7zQ6u4v0x0b6ONAkgfI2csPQE8KdLnMeWW0FmBe77hcgFk77HoECcu.ER3VgelsHfX.M5WjcVgeORuBmFHA4M8C9jS2QASODpwFCoH7wkFhilcjOT0XJdAp8GrnXbn0uYnIuNzs1gH5qTcPz7qGX8pYUr_xczgjltOBdWgJN2y9a_tsaOw8Xmyb_MUwze4KK86v4HpKc4wUruWq1ILD8AY7dsrFxOn6jw6DHNn6hxldFS5uahEL0ogKRgBCdSfaRc2bfF5YvNC0Ix4WRBnbmNfD5pFsPIeVSmO97O.3NAYEorQFUybDj3o_DSTh6a9k8CMv6FSdaJS6mXQw39dm1ZY4hbnRrg2cfFVnaMq7jP1atjtUsP4O0wi6cORlj0MGYuyOj9VTu61DXtO6r0gjRtiHpHFXp7htgVh8jo6E9LE34igUcRa.dBm3vmbYXTWTtmLo70s09X9yHVOT7DNthQ6xHeilD_XsmZKOFkV4izPAuZ0XI5i5brnIpOB0ypJShZjjWrU7RgSVoJIuGLlzaNTIXTUjY5zk5LLvFidiZGYk7lQSVOjFMWUHz5_wCaGGNfmus5TK.sbpzG8KK466rYtIziqq2bZj2JDPn.QQLqN4_d3QXfIU1v3eYsl12jnaxvLjv5X5drh0WuNaxEqv7BOmCuQ",mdrd: "bcQW8VyD5z9wjdzVyofDjsdVdExJvZEOxs0mPQEUq.M-1739243500-1.2.1.1-VFH73tvjVr7EYQwkqjypXKI1ItYbVHjIUEzEddd5LpGsp8F5AlNLrOVoNAzzH3ClouIJjIDKGNvpRFWXPeWrbJ.B0Z5YM91Qpg7yrCFoHxdB2Gs8yeIdQud15shHi1bd5c8hsFdh1jH10sv5321n01pcwPo7ryi33TBTtyRt.wmDMUL6e6aGA.mqLRKzrje9wfdHm6ylKq2bPkOyy.LAf.ahI5Bl7l9CZkHHYAMzu5nxwKXUVh1UzmldYsZ2I6pGhjaAVNDoQDCEqpGmN7eqIJa6npzfzaiZtLE_sxTGGdGyXQRbYwWH.j6WzjSTQl59dvTFW9Bi9xcNVc_at8eIrn2eu3rkI_3qIJ9bUdALEVc4b7uTD0eGW2tMMhors1IAIs4zwA.eN_0LZDhgzoIrN_xIWdxcKyKW2CJbXKeVdqIKJHSRquOfgAaATQ82BTuZk2dGZYnURPpbgbl987Gg1PJe.9hqqESSSTNa25O74YzFRrK29ShPwhUTE56kOTFzqmm6jBm2M9Cq_ur6tcOGEq3psNlPm1xn4wdWbOcIY6eFN4C5i2dxZbs02mIhyLMm_P81RjwPd0UGkl8cAvZ9En9m9nKN3lAR36Vr3YgVzh2QQxr3HsV.ER0VaCnxjSecxcFZ1GTZN1DB4hDvrm7UHH0dn1EGcjjF2rmExqqG5QdRXYwXnhNP4iFWenQge6Gp3aq_QRIvYxCep3XzJhwjnUWWtr59Ge2b616FMUdJd5ZlHiECZ_LkHLelBF_7cLSR9_6iled6fcytGn4KDJwYB3iCfxXYl__6pm9XSB_6MLIgO4.WI6weY.GI6KzlBCgcI25CfMO3kN.R3PiMNpHevi.zJtZPM.c7cD1uaD3kFwkasQuJmRRYHNvCcbsHEz588ymr4cwJgAfjHkmtHL2CajCZX6Oa1w58Wbr_5eHlrVw6H9rmLTgu.zbmF7fK_yLCKjKi2RnUNHFFXuwGre6Sgy0keSyWp0MMQtYJv7e4hy0HYhxPgKSinpbUjHSrbfRlSMZpVGjbYEbu0nYQuUfVlR12AhdGUv0vCz6xjRLquUVQJvGU6er8wCqxYfiqKkplVI2ZmGnqOge1BaVfJkzBCh1a_XdTLjE3H8DEs_sS_4dBH.v0G6zgH60N.2yTGoFan06shV7RHDkvZVCSgWxGGNX22iHJHju0O7jIbiWy5YTsqn2dcf0DLFBBeQH.Xcb_bE_50palZB7lhbN_7cgfF1HRQlcAwnAPugyrBn9cSb_Uuw5LVUmkNEtHf4E0VM1lDAcRlqgFoNldPSmm1yJLvpyZOi4fXw2LPhUk3rHQvJZG8Pi_4Srq3OzzudM7AlvGcP2Zg03XKknWd9f8CcgdmUDPrUALmcuRJcVJ8CluPM2Fau6KDj01uKk6hP1c14.NjFPCPlp7j_TUlWViF3T_JSIcHv.005nyxrHe0gvQW9XhWYHo..lzxVJl.XtDospSnMrO4hjblUsqIdmFzwWf.rWlKZ_mehlPDvhwZ5ldWgfhUILmaGnU4g.qoqKpdBMBjyuaVWZ25937VbpJ5fNSEw29BPZ02Mp7TGKd61_tpy3Qu9InfqInZI8gcdq8PL.0.FNkKObIZyzrVD7KRLBpBG4pnQg59PEq3Y.d6tA3_mPdz6vfEtnNC_DC0JSO3_F.opwfDIUz_W5G3T13d5soTZMVkvFZaOWs8GlHKB0Nty89mC8dFuCvP34cTWIxJEDEToctP8vu0JEj.wxTfCt4QNtUBnskT2FyPzDK8Z.PVA7lvXDEDmGcP3MtcsQNGCIW9dj4kghicoWNFsU3iKnXScke1RCFHIBNEsJvFrlJEuQgHQ2tgsfmAj_LXpRAe8aT"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91012727fba31fdf';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\/165051980425?__cf_chl_rt_tk=5WWWUFYwupdy6eoGzNKY1mWV.AX7JE0hGr31YEPmoeI-1739243500-1.0.1.1-UTvPeHI_jVF5Th7uYf5exVseFrWvkehQLcpHhyW5rAc" + 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