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-2835709164-gov.caltech-edu.pp.ua/post/2835709164

  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-2835709164-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910101ade8c10a81',cH: 'I.AyHUwIgLCZf6TOqw3K4XeSdh4LmkAHXNhGkE_gZ8A-1739241965-1.2.1.1-jN9P9CvYzvfdSMjx0XNdYN8.sKTnEwvzQ52a8zQpDrn1uQio4URvf6cYFfFg1FLL',cUPMDTk: "\/post\/2835709164?__cf_chl_tk=cZgcV3iFXWIrImQCW105ZqgQpSeZWF3UtEQCZtRTzEQ-1739241965-1.0.1.1-2VzFGQpRLuOla1qciL2ZEaFfSb57udkoFtYCy_SAsM0",cFPWv: 'g',cITimeS: '1739241965',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/2835709164?__cf_chl_f_tk=cZgcV3iFXWIrImQCW105ZqgQpSeZWF3UtEQCZtRTzEQ-1739241965-1.0.1.1-2VzFGQpRLuOla1qciL2ZEaFfSb57udkoFtYCy_SAsM0",md: "L_PZwLhkvNK9HG1ipL4.isKipf5iq0cIoaZuJSe4pPk-1739241965-1.2.1.1-IEmuDfBYCzbR_JOqosTbC5_7Yele8l8WMbxQOcua3drprbSjP7PG3OXKt_ld.HjEbrdL2mmuvQizwHqQrc1EMLx3Jtv8V3X1QCARj2FXLMtAA1YoeNbx9XRe3qQJcnhVt4NbqzqtIp1sMGAKKog3yuHRyrQFSbUh2tfgtYyLPl_X7zulj9axm29u5Rrun0wH4S8xif.yD73MBok6V5JYnBACLJs_mH45uZjdDAjKomtHLtFvxk54bAq2xQpMlH.NerSQrRxczzeOxhZ542TYAJqgTWxwG8jQTLqMPKWXqwvZitg.gAJDwu3oB7Q5b31nZumznOqouPLcLBT2abSk1j6PkosC9MVnR0s0Uo96FNeeW0pxOtmypJiE7msFSWKgIKwXzcHVc4r8Yp1AjlZqv3A3xpK6cYjjP1611kSvxpKM.iiEgM5yG.ch6NUiYn9LSNEEKrlvbq1gLWJGgG9dftLoUl.nmxXnP4tKOezbn94GeJZlHVaP3AyumcXo5qK4Os.5MARkTPVc3Eer07A7eHOqgUblEhV62LxLB_9cZf.5Rjpwga2cHhW83Tg7ZXVnPj.AXT.feUPDw3cyDJ2.xLS4VB6z36DSpKRy5DPc_YQ8bstvarOqfuU0Hfxpgm4INy404SFCR3GwLvJGxHHoJOVU_9y8Adwn4ryZDCbrZ4Ec31THzjSrXZb9eKv6FechxOmWDWcOjGwOJ.dZmRF1xpCH01KYajxmqIQ8Q5XH4Vu8fvIlb5gMXtpdF5WR14T8ZzIDJnjkRxavHrM83CjkzbFAWMpLeNMP79i99VWZicaUnsTdxBHlqKBYz9sDcovZj9sEKBPVahgP4hmWEnFMjnjROP0G12EuyUgOVvTXVFUgiimvOC9fgfvM4dZbJG9mrZszvXgjWdDQPpmkhOxjnWDHGIaSXEh8FR.N7FLGPjwEM34kuZZ0dJ2E4k61Ry4LJl0VK7p_VQ.nNKY8zmYJnPFdPtVQ2C0Gsd7oUnU0MWc1wcwTJlpB_aKLA6sFKF1awbabk4t8NIzghGSKLjKlHKocIHEK.JykRRrtMjwk3N9W5If7cFVJGwsfDdJoalhf_EyhdZj3y1XeCPmTAhKHWuFvTcN70cjPtj.rCV1vO99f0SrQAVZdt4iD3YzcGYyY0Wx9QKpesYRDrKmFJAfF9grb5WSMt59DbiW_GnoLC.uG9A63cH37H9x58IaDy8hRnuWI7sb842TdXgQE7IWxGfn_uvo0PRrTlLmrFLHckZBVaceUY0yZWE8lpYn0TSxE9jpCu1YlNkUPLfoAxOP61g9o9xeQ.K5TXW9xrPuFZXfFqOV6tYTw85iGir1ojrFbYYOuVxQA11I1raul91pzDLx8jpSvjzmMuIbfE90p3xnAZxn4jPBH76nuRjT1fQ5nxcZoV6WtZx.4MV3_yuJq8zup3JBwdH8eotgjG0a592bJS8HTm0nvgEJlMAPqx_0SpyoGHgHlAzXClQ01Yepv8I_8Y.Bu.R6MGl7kXEMqRpNY0FUMu1Wwnv4Xxq6QVeX1DWie_q9DkrJTZha_uf78rRF7XTj9Odnh7yIG7Noqgdzyi2TmIlSX2vN0IQY3Gb8kzr6YxbJxqMLc.NsNbwsb1IkSZeSLBNaOSh6z0V8QMcFINcBE_Wjbn7wgbhEgCzjqaCs4R4WzSsXUiZiLDfTSHPvmKtOhPao4UKCzculqbLEtVeSSrzqo0FupXoiDaGlaGapvTMwBXIqJIOg1CTSAnknKity4gPoa05zoUM_mqECb0TbzC_kGoL1aRdihb_bIKNhKgE7SYyXnELPYyP6IWunKyry.GeUft4NTd5W6SMgqXheDfxX9oz_QTSPfSKHwcMSQ08y7FL_b17WM.sm1R6Or_XLHchXeXyDGBgm.oe0ftEEZqjR34mMi2GZLnBJxKfRREx5UcAnCGTIH.eCWtlazviuAHAR5smex8naZfyLno.64FtgCwZdlDB9Ng9pVmOdkx_GSGkgJYjkzEY2LWC34KGtj_YamZqrnM10d0n4RfqJjk9GuuabYxEcwt0QL_fiGFp_bJLYhoRJ1pH36gLtf7YhBs49LPEBHnosHE._RRKdTqMNyt95sgaUbSnEsRgF9QHpOdqC8a7xnT5DXLOGS7dH9KGzfIk0mj8iLhrJzyzAfw.MMakUDNmLtw7yYkYEm8UVaZ1Qh87KcpNbZHit8QZAtSzyJMqgK0L8pTKPBOdVLQsc4MWceq01I__3O_N2qdY38lkZOi9.iLVKcfA",mdrd: "3U3rdXT9xL6tmzmLNyN8P7L_CyPuWKU4Q.XoKl1U4OM-1739241965-1.2.1.1-7nNjjSEJ7fDnaQrKdnVsNflCd7mdfSHOKEprSilkg4njnt0hGVpJoaBYiD8vBCyfCUqvDcRyR4i1psh6HxPiWkq6w3yBU0iuoDljS3MEG2yCUfRMlzvfpJLtKhkEwVs5oTL8QXZ7tVa.z5GkXPMX8TjJYKaFhg1jbP0EhMRUZcMDqlp_elc6y5jXg9qUyagPK7RKJdE8h.XBZk5Lr8d_YNNMCsVxPtRDF5aXdPrPUMWTTY5HrxkP9R8a75fmvfho.YXHgos_xkF6cCR_lIR2YoaZw82gH_cbv.b2YRO6gTRRDPIWeNLLhMmBXXHVRib3rtomc53wMYVnyd835ytdR8cp57LcMbszqtJHh9V2QbImx4uexDpC9MdFYxGNQtZu2Pad_v9rGh0jGYHI2_ziVokNXXLvZw0XAziKnOGu.A1UkQer5G4VRHWmPkAGlJbwTlWeWaxk3JvzDSc6dQPtTGW5WTn4LfWCgr3YSEH8XvUfELHeym3dLkS_WrxBO6BCVqsrb7hhM86nANSCtd0Nc18xKK1ahy1DKmpIQuS9S_VcgQWyR9vlfsyVTPlHCV7L_sFLqH8thHAc4DcbkNSPBSvPLp1_MNUHH8Pfygna.HPdSuBXbypxkixCmdrXMQYSbU2qUz3pyLFq75G_wmIJp6D_J0hrP66l2S7JMzcb99NuClG.44F7G9uemyGcZvE1ZzBw.cwul2AxS_gsRsxCHLW6i8zn4ivcuVAmGwwPhlc600za5aImnNE0Kc_kZaDuPftu30Dd5odIOyhod9HtID5UeS7bHWIPhdizyaY26UXqaf_1k3s4TM5Ry51ZzJKDRK3ZBqv4bDos6zhz8hZWcSTsgJoXbzCgYTduSnh3c.kKfSjnJ8t4Afw2EBcIAHtXt.jazfgwQO.vj5wM97oI24nuD9oK_YAgHryTZxCW.cSYJyM6IGSaUXMXtEIOEY5i.nNA7.D2MII6iUhXYv3.s7eHT1hbWfOvEjsTJipvRRsruUaPhgF8biwDANQTdJ6FuZHhNogw6SbEhi1XLwT0cvzWMVCk4BrVtaQb5xaI89NiYK3sCmPiDONAnjV.rWUyL38YtofMmzuzTZYL3RCg9RaahKe7TXOq6tTkMwDro2SJr_OwLOokpNipbGbOQR0xyQcVQ8VY1TOBULopANRh_Pz5TTtJISe54FVo2ZL_R_xGST6.EzyTVEVC8RXHIt.lsn6FssZD.oLohV_sxbB4FDQF2SXaswlb5h1QEYTa5nniD_0Y9wozozAIluq0wAwTb147iHfHTvhgR5sc66cVN1lo6znKWjkzIncx0l3EZVSgvfqvcoJSsixtUik97ARCglUtt8NvRRf_VQzAocbJgpNNUaDz8UsITZ.uWb1qJVSTd7fAlLPWPf5cvNjzWwO4tYf8bUPFeO_TOYVK4NacYFlLPcuZJ6IIfZIKz.VLz9p56ZRge4ON.6i6m.Q345AkbAsMOgf1H03kfdDtZbI8ABNQswT.w6okjkm2Xfe7_Gy9JmBdOVaN8HKdzlzRQYf6Vh3HxSTHgEPZugXO81RYYJsrMTH1XZoLbh3wNrAIK3P40BUeZA7KeainAWo2NelaNFn5j5UhHImdZYdeMAqEY5Dn30cNhUQUx5JxKAICLcowZ202E695eDlGFLvSodvSrfK86cc0647gKp_wPC15iVEOteQkQpkHdrb8_XEBBucNmOKVmn4Bb.v196p0cVzJL4kyc9WRGOiZZXK6wsGLKTuSGEYzZfxC6e7NRtNwiFfDkQjujWtg4jtmFpKHUFDls5zGND9SlQUAscNN_y0x.eX5wC8FeAK_C0vZWUUZNaNGr3t27b44ARQBEp5huL_RRZ.706Vap9ucwSsWDG8pLA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=910101ade8c10a81';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\/2835709164?__cf_chl_rt_tk=cZgcV3iFXWIrImQCW105ZqgQpSeZWF3UtEQCZtRTzEQ-1739241965-1.0.1.1-2VzFGQpRLuOla1qciL2ZEaFfSb57udkoFtYCy_SAsM0" + 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