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-3948527106-gov.caltech-edu.pp.ua/post/138539804187

  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-3948527106-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100cc1e49050658',cH: '5_X.VFPK5fjjDUal2NAZ7BtFW7jt8FUsIX1RUQIpt5M-1739239771-1.2.1.1-QK8t6XH4QTracPZOTjTWIo0NRx2vvuNObCb7vU_KLXx6dZV7wInSoIgkOqSB7Nwj',cUPMDTk: "\/post\/138539804187?__cf_chl_tk=wfu00NS4JfC2kL1oOwBp4ZuMZ2HyyRW.iZrf7PhRHQM-1739239771-1.0.1.1-gtOseoGhLEgUWDixIdcYl_RnyrCH7NBQbClh9v5SIfY",cFPWv: 'g',cITimeS: '1739239771',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/138539804187?__cf_chl_f_tk=wfu00NS4JfC2kL1oOwBp4ZuMZ2HyyRW.iZrf7PhRHQM-1739239771-1.0.1.1-gtOseoGhLEgUWDixIdcYl_RnyrCH7NBQbClh9v5SIfY",md: "y9FMgQ8_fvLiEl1_TG9KOKzVjU_NlFzcvLYCcPSutzQ-1739239771-1.2.1.1-xeCmVSVXeMW2Byj93gvmP_gBJ9hxXJGux8B1R.9GWjAQymXyAdvVMdmHoGEDvhsADnk.ZrBEEnWCWCQulSDT0Yn8ZiyaclnSqgbJpYrydPRQsfUD2AtZ8gxWwizLWRG8QkOyl2vonVwBc1r6gEM.4qqzZycAujIZhhwRHwdHr89r7G8mT1qdmjNZOsD8nGwbk3kzope8Kjjau3MR19KsyzvCagNFXed__hGKhp299ue4HQ9CXt35RtnWlZzAWPZZxlzXTMn3UBW2CkaynznJhHTXdSpQi1eXV.amOc5HBTL.TzAifvzDmzYejM9j7JFFMqC3fLOAWeT9ui6EE5SO0WLpCGeu0Oz0jjoxNiPwijhvOmHH4Bx3nRUgd4wJsueAgz0E0nl5gcdQGMqiiMhXCzh7uAUjv8yDI0WfEmihD0r3qf4lXjHHiTJiBxzGsszvBqUFqfYxJQ1ZmgxlB.DaLlvx6RihYFO66jOAVYDWnX1csaDHgvV9gDkaCjBkP5NHru_MgHb5RO5cgsNvoGyEZe7PUtz2iKarz0MmWqDx0.olgjaXXV9ZlPSpX9U3cph3LOXgIcG0wFmq4AYxUHRKp3nyLxKjh_XcnCPPaQvCxRLqWLebxMpa3J3md8t3TbQucvonbYtvcBwtDTIq1PxNwy.puiTfF7PMMBKNBlGWvgdlJ6F2UwpXNETZZdhR.wmzUs.JgMWPonMJkyqmVo_.xEgtWLHuSb8jH9.4WlctlpIGZOs8wuqlVEeGbnMwNHemzU6IUOnqiFX855k_GQmSbAQVUTpqJ9qJBzZqZP8C40lRGqWBeYa12S6dzHMat5NuhtH2SfTDHldsp1XO8JkK0g182U.BbrQmV8E12idJ.mQZ0sDys2PS76bkFJEUq0MLPvhMholcPnkLkShLJMoiq.YlAwQt1yukxzMI2YAQwxHnPcCWzJy.jbREO0azq_yexPB.ZalI7QXiXbl62I1CUmIL0BCZAcGhDBIGdgXLRgiedYVC8riM.RD9ftuHlLfJTeuAyBY1NI3u3pp2krkKgXHpnnsYuP4HtYynJE9rkUHLsyolGpiF4E5MKPBFUbKZBMBhFtKOR_ajBhEEJSwb6qew56J2Zf5KfAC3kyPhcoHIEhGhK26OueHkxQgwvLKOX0dKK0OOs6nBjmmPBIEVYT8WcrG1SDLXANYmsk.djB2AbnzH7y2vuW3tuBWCh46MPZrwZcik4TOlewjLLafqETbI4D12IQ2qHCRPWOMCceRQsFDy3pBkDppXQDWfKLloSL5nQg7dT_ZFaIl26hvRmflRdWpnbbsvQv9FT1bYl2Yeua4HE8Dt7rptKezwCDYdzjH3TRosPsn2hRtigirR17LANovkb5tc7HTRvXr_z36kgPcHEiquoCkcsx5L45J1Sn8HEsV7xmXW5YUo2lynA3pFYriBg7krVieBC.0eVE5NtvHxtsmVOPpPGJ7z44yElfRZvAVCqoFcZ.pg22IbuKqnWXFPvQ7tCyOA4bNvd06dmCgqroWas0ayCkqIn9b4vO3c1R9R26gkrMrul269bFfn9vZFbxoCsMcjJbSvQsJKU93RBLsP5A4mQZXder7LlQ8HtyBkWXpyQv0Iq4LibRW7eW9v.savEEjYgKLnUi8tJsD1OrOAAGHpClY6xSJN.qfv.9OV7pNUJBVZIZ7WiI9R9_7M2pidVKUcKr_3IHpog.BAkzL4ruMumlm3my1XQmdZlyPYDUnVe1ZP3T2s8RW0nOrGqUv4wfzJu9Fhql64WU0Qc0xMR8Ndhx0xzVs3_EImMSdYDH994L1AXubc_ramfQOF72pMst8vwyFyJSWliiBhUV5s5askkmP5PkaW1jx5qZgnbyKS1NscmLwVReBAHYczbe0gBhyYqa9IoWPCqimjATtXAc6oMwxCtgxqj0uGKws9R1Ph77nUVYpJnzTdwsJ1deyA_srS7TviAetBkYY.M7brJx3tg.5YP.eMNFINtzVdZI2kUcZXQwy94uk2C3uHcTB4SvjEiDb1MfYvBayU8vWpf.kn1gb4GqFCmi.rNrLbzEC70b7Ubz0iVHS5F23SGBkLxOHXsysyE8hC24C9.3zk3GZb1XPhTKTwm26qfQgLD6cHRyvWOED5A50E9K6mxqcwlvYFwjvQR2uFb.8.nFNsb5ftTery4WD0hIeNp54pdm63F3BtlaZ1dPSs6CClBl7AQWi3uiWVbweXV_.4S1kZgEjuquBNaZ.QT9xSeO4WYzSwYp9VnnXnYw",mdrd: "Zr5.DMRrvsPWTkVCLBMfheAHcjB_Fum_Q.ZsUmCxW3c-1739239771-1.2.1.1-BNUsUHc5AKXRiDI0o_Vitb0zZ1l2EUqqdWSwHJAYHkn_qmspkQr9hfFb_.3blBZKgW2x87SfGEcJ9FqIHbHYQlw4ifooffIubzihqkG_3i01KtdoaA6JdW8PLW8Rpopw.ENJCD6TglcFkP5mFBKHUzJJWU_YHTjI8qzUy3zyz3easXQGHmNzeBA8iz489NrY5zzpRaTS7_V.Rx_5.Gq5d3anyv88yGAgTZfc39cSSCsBk5gWEjAAMuUCf34wDOZJ.JU.H9ZbqfDBw8fp0Bb3d55VaAqgU4nD9fCbuEQLjCrmnly4NjzrYFLplRwy13tQ0AvVxaxEPUKQ3xty67eDnnBdOGK4WpZduH3DHK25L7hx5pPGhRxi6rxMTYhEPAr1jgU1BgD1ubt_78z1lhRsdBJ5BWKVYCkzom1jOCcOtuG2xoukyX9J3fJwyTFOocV7ICNfix6OtbLGgoznHWOXJiFfLmG3EmBV0ZNjVr.nqyyjedus1SyP3H5miV9opb4WzITt28f0fjuOg6IlTmY9w.X7bDb0O7eiyd.xhXKlzwiPVsUYxlFQuWumU.Nblh2j4.EE5RdxcvjBN6Gxavfdv1NE1vSshUuVes93FfSZonii04MZZFjuYJ50dYsSeNKvvOnXLhfJH5ZRcX7liY0dablBU88kzT9U4KgvlooE8gAaPWXjvn107_ow1WpZaGulXxuvBVsWCaZh3fzFv3vXXa3tL6cM0z_k0lQ1qLpvROZ3ZDqCvnBrWSQBTsQTvvXqN4oSOSjCS3t_LVcl6gjgIJdl7vC9k1U5ZvvdPWvV0HZvKb.oKYR051STgVMujpN_Oycde0rcGm.D5M0DHO3St1wmG.eTKJ3umTlHrCND3MppvGV3szxuANYunWSV7PMCcqeiDIjOLMuUQp8NShN9rI06BYLBHo17lTFlgMZ4omN9UWndYrreDo60SxgwGOR1Rmvi9Iei3CSyH5TvZXNdZc2Y9CVpAEBUHkM7s20mVeqR6YVu6HK.3qQBr8AyGxUOn47mAnIPAKfTFjBEH3CHXzOXd5Ys2GkUQPO329hc8UJtDAPdAmDOhPf09bMtfwYqPfO7qGdr7xL5xCCbZbrLmh5lBQf7zeb5F1xOWoDf0dI3y6rjJEEWUrctcYdglPS68bUZ7lMN5beERdww4IM9rFdgosaMkhL8wiNgniEwrBeER0ftq20sEAPrVM_7UfPqFzMh2OjjhWlG05HzMDAjOPqfbM6lpMLKnpPd_c7sZ8N_VDodiBqao_ShVhKRGhwBK3.F9sI7XwUsRjhdQFi5.7n.ccZ199UaGS91hNnMCzJfjYU8q35nM1uq1kG581Xfi073S01VuA9Ni4kDop9NkeYTjYowlnLEWjoW5xvhUcjr8UvreEWRIvzaHsmTGnPrFnGwoehCA029rfAI6.ffe8KdZ6MNKr6_vAFgyns351CWQSIoPdwY6Sp648V2I4C7lN0cbfG0sAQaj6tql_M6HQEMqYC4pqv93WxBYfE5F7GqiaeGzxVqKdMntfmVyg8qmiH3OMMZ9MH5gQlD1oKJH44dIWwepziwWI5s2aj5oVyP3pbaJLBRK4_B6.SRRh0X31GyCd5Rv2CHa45Ljnmiu8M2o1XSkYipE7yKdKPaBVtGt_2lyZLQxlJdDweCqMynSxxbiWBAwx0TG16pRATmevp9AdW1pSnMp..vWIqun8cr086rtz.8pupdPSr5yLQHciKgKrUWMr4W1piXoc5SAPbL9qXlxn6R4Tb6cKVRCur1hVYtv_P0Ow6FoB1VsgK.523.ClGeX_1nS5Oy9NHbiCL9xaUd0z3AmaBT_AIDIp01qtOY3Mo97YGEZS5KELp6ERm71jJJFWn5egQvvIJoWQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100cc1e49050658';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\/138539804187?__cf_chl_rt_tk=wfu00NS4JfC2kL1oOwBp4ZuMZ2HyyRW.iZrf7PhRHQM-1739239771-1.0.1.1-gtOseoGhLEgUWDixIdcYl_RnyrCH7NBQbClh9v5SIfY" + 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