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-2917035648-gov.caltech-edu.pp.ua/post/010617425129

  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-2917035648-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ff8947ac0ad6f5',cH: 'NpWE4SQ6pNrtF0bzVbQwNwV_E5qvMg6YQm92_SnoNn8-1739226548-1.2.1.1-SoBkvyAh5.79uaVARTDQx2qfYci0xLgC9zhiWg9xU3xIRX10gwpesH3uCLHa5VUt',cUPMDTk: "\/post\/010617425129?__cf_chl_tk=3Pio9DqJf19I2MdZg7NNhrHJVETNstKwUYJ_GScBOB4-1739226548-1.0.1.1-9L6YcjL0xww.yK9nNVz2UEDkJAubJzEsJQI_wfsYoWI",cFPWv: 'g',cITimeS: '1739226548',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/010617425129?__cf_chl_f_tk=3Pio9DqJf19I2MdZg7NNhrHJVETNstKwUYJ_GScBOB4-1739226548-1.0.1.1-9L6YcjL0xww.yK9nNVz2UEDkJAubJzEsJQI_wfsYoWI",md: "P3.RxfWHtjiTB1gMd_5JTOmD93nYM4AYEXJkaO1iAjA-1739226548-1.2.1.1-yhmWnIEeTSlx15h2f5MvH.QVptsPpomqG5b8zoV1q0YiFnAcl2gBdSaLOlOK.clFn0u7csLrSyxXm6Bv3wjX7sfbFBw__F3SEYNvX1Jfj7v5xEnzAeUdyHeGTtrOD5oTptJVgpXiENThD0VtmdIVVTwAYMWtYibfJTSoek6EW2LK5VI_my3KIeMnLKd86BmOO2Uoy6H4qJS38krGwxSq2q_EeQxKPEUP.abN7q00.Tl.e_dVKgKKBeR6MWW7Zf0diVhWNcV983EiNETz5XJOeIGek2rNALuekwtU_cJarCFbrb3Wtd9yfFUos7sAKA.F515ee5qvpjLdMWIfW1kkl0RGmbwfJg3NpJOJckg9A8JesCbLq1OcgUmHvniWSuEj.NpeNEhp4zR6w3ePxj5p0D4T1jXes9G7zcef5Vg6RsJBKIwRf2hksJwSSlDDoTKLK7YZNy8IT5EVoZjE83G5j6PZF1Z4lefNeGXeLOS082BHF.LiM9d7zK0g3sMpthGZoqAcnzHO575Ho5dunfC0MSU01d1_VtTTQxb_IK8t6pPxnGKvNOEovpJWIsh8PAPI_tcRQQtxGTg0Nu2oNOOvTN6SUJfvYi79cjvZWYBVeCXik1a53gxZuE395P6PIRuu3TgFB4Ae0PPUtjnExauVA4qlNEQo8f2AidmjaWTief6jrtsRR13XuePePwFH7pyRUHOCgPppmZ1c8xMyOP1Ih_Rtko09Tmu6o3m4pjuNNS5z.krARQRGQCeYxJqQHAhSPQyMxGD0y.vgCn22or4GkF_GUyuLcDINYIj2IByGIIFy2ab3fYuiMUjeP1bAtX2l_OpB3CjqW55zvKqzrzUvtffEP9m7ke81DedfRlWWJAZLlhPzudaeLbYGjzlnUQp6b5eFI1jdn25Q8b9nqHZWlrBuFi7XFB3WKhs4AxzGOn4pMkjvdQgU8hUr0TMk_Wkt4QLY1m0YA1JgBgaSuKy7PQx6TsC_5Kow0JbxFad6Wk4j6WF3w7T7JWaBAFejNyY70F0SH0p6DL_I0N4si59rOVNxNR4zkCfl1AM9FkDeRLnWQtbhFQnwxLgOvu.8lGOc_W7F6XoPLNR17txXObNATxDnL2jCasO_.avojfwEGLj.qAtvSLncaTJNr_EZOBADsuF7_2eI.o2xIfhpiAjXQkpyTE5m334d5RMuKaJNzbeG1UGrlOkZiZdI3thCt_5400AOtIokrZsMCKCg5muwerRwBZCQwSaaeYYUgV6ckynZhNhBodISrmQ9oX7fZi.KQV3v8.yGCESd7G1hl8rO0MDyhXfghbM7LP3DDXphlNTz__3uhrAoWZab1rUce8Bhb64x0WT.KU9YjjvRkW_B7gVgFBDSP1JkeW_RDX41.eCrokt_WL.4xFs9cuA.gTP6Egbm.gnQXnGP1swCzQTNKOp5HsX4PS6QRAZUdOr7SS_UEREmrUc7PCbm0MePHtcSRqsRXRZ9DEkg_taCXEuMJQHeL3MRFWexlIXfye52cC__eLNxKq1nENzkw4ZyugIwJuZYsWWlVwf0QzW2CdgQTYFuJxxDJKZbhlkHi8xWguVVsXtYkMmP3dWAzyHhpH684eEQ0pFDBYWLLXH8oKab05OuPptS5BmLZUrP2pcCcE77Sl8igcbSgdgpiswGJdaYr2oGmZYdlLNMqMsspTimXjrlNrnz3DqqEwg3X3vZ5psQGC808txhkQcrIeN.mLxYZmLUGL0Qv2Hwg4pBQ5wZ2talqDbK0DRDzW_vv3w9WSzpPoz10RR_Ym.V6UgZyXTviGqRiK8k8_gpB2qXBK4NBXmqhU7smBxC9jnJsk1u1b0FCfs3UAjDghUdZtMxuLxDDX1kGbsqV8FXt34DqZA7D7uoF9HEoGimwsTaF5OVUekT_F7PBugQhEA.bl4OvkmiP.019fSKpPGb.93ysjL2.3WYe.TiB0e0.MDCecu2o7.GBVRTkTa.z.1l68APjegR8mVn27hK2Ud54REzlikA2t4.5iPpVucorYvFORxLlMsz85DnyBHTkRgSusBMaylQmJprSZ1p2R0QYQkT8lKyA.Ju0lYK1X2sJsRlbZHaVlwREPoGmcXKt0YAcxKuDNIrIyTnJh78YZa2aG_FjXgFOBo_7REgABiLNoIeG4gRCTxtgPoV_GNT7Bpc6cK1FCY5iDH2Xs0F0L_rLHPfbOTc3agNBpFsQC8XdtleqWzffsT9MbA32XLq2KiURpZMqPyp0fp.kz_vcK4PBq.b5qFREw",mdrd: "rnUkrjIk.jWrp_3YSvaOlmYvxkevSjESZm4PHMUGTwo-1739226548-1.2.1.1-bHy5vEDqeVvG8re6v4.bhgXQ9j6n4l4qPRU_xOkqPLt5VObhyRo.fhTORbB6neeuyY6KQQ_7y2bmPwAJOUuTRLa2R4oKW_rjQDPFZaCeV1CBVQrJw_gbbg15scnl_dBIHys15M7wRY_gee0pHbdhHQ_1wSE7nHRJ6Se5hXD3OzSXNSPuqNgFjTIpBwB5Hp96lL_Zzw_mhuRUM6kSOKC2WfWbSutgLkd_C12lTKfN0XF.GloThO8zvXVVbk4Wh9Lhza87KUIsShXK7FA9Rl0fDJBCS3GLll_vsEjklqwE8AfJVAb7V42T0uSxvCCZev6ZeeCmjpcxDRAF1.kW73HUG1TIDfUE.l3BJoE9iC9NtB1oqBfpxxLICMwnnO003aQ91lp20WOFVcQvzZMdEb7o8U3rXFN.vnbLy8JL0AmGsE7s.5.ajxt2EywbT74UiVx3OJNHIuzvEth0w290Zj5F01sEPODN1ATPFam8F9DBQ6M6DUGAjlsY8RvW5sY1vOWnAG0kvXhg3fmt81s75uis7ts8wRrtAX89cR.W7o9lCA487gf.MnYkkHv5VefS8Gi3OiEedx7rhSFLQBBTbPKSYp_gVNHK4.9k.ywMkoW_bpe_S3BifwqIrVxo8VDAAuoGa8h_JulHTyTAt3relJ7lq7calc42oH.4zdC4WVx_3gmVZlHLmEWFuHNVNv4Ys0Kq43ZDX2n.zqRi_R5hBC_kGpXzFxSiKbrAnv5jAfVrORouo7vW_iUxbI54KVk9AOTglcNHK1INgxMmQ1.yxlQAiqs69w4NbIZags2zXQicMlKeUSgRltO.ZmM9Yu22kFVosFazbrS9UQ5XbhzInMg1IjyU2nR.c1agfLlP6MN6E23v2Wgp4g7nrHe9QVrDnTcdHMnX6YbgPn00VZ7qdn_f5pqSDtbiMmjKIe7BTYiRRBguh.AHilQDCB3EoHvKTryRSHpx0zjEdRCt6ogcfUbZAwrHKTZg9bee7ho0uzT4t7Dv03C9VJK8x.U.IPMHt4ligmpZZLWSMVPcbrTIe_KvKTjp4a9SCFha0tlHx.Hg0gD8wWkWut1FydnUIUrcqgb4zkdjixTKexPn3iGYfalVhkOiK5iQi2AuJWVknz4ZiicTJZWiDm.BShon85xOK4av_YDxX9LI7_vmPLJIazqEIX.Rftdfoo5beEFSmVbEzfe1lshLrsnvf.E0Ht5UGzcNsPih3XlV_FUXcLa5miXApSSMZ.fS7xu6fXfhrYrQ9T57XpxCYGOclgWzE_CsjglIw7sQmFyV6Pmo1Z7aHW.VYv929hxq9OLmbP7f20vbADgTxRgdzP49rXp7fmecMhSXa5roUUNw5RkavxuunvK_HOSII8HDA4Wd4B69xM3I_Et05KRRqxZGPFw_R63kyXo.2_k2eKEN_7ni0tL3Gol6XoWhVkzkDG4_GrBdknv4ZDX43J63TSW6TWtDzDR4G2dAfqoOGAQzKBvCdYKVx4tI23PjMBM378.s9MEVZcg3Kll84_9vENy.EI2Fu4oU5ER8gvyS3Uei3RYrH00UQtrhnFB3j6GSaIsaTzrdiEuSyi7y06WM.DQvOnkeARavG3iN2zW09xZPGjSACCbqTVXWAHrEKZrFPpjDsyPYX7s5sSDD4hk.UKNrFkEYljHxtPInu4CBthVvNHRqPuonQPHIUul2KRKoNc0diDFL_Pyy7fTOoQNrFXGflvrVPKGZZWheG85OUdvR9n1npFqhgbKs7feohf.Cutfi5d4nB8jBcduTlLujaxO5yNWlcbm4fEtO4Q9.6T0I5MculRj.LmoBe8n3ZFHiT6udM7IZ6szEhP21gGad1jwHNNc8SeaiiO7v"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ff8947ac0ad6f5';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\/010617425129?__cf_chl_rt_tk=3Pio9DqJf19I2MdZg7NNhrHJVETNstKwUYJ_GScBOB4-1739226548-1.0.1.1-9L6YcjL0xww.yK9nNVz2UEDkJAubJzEsJQI_wfsYoWI" + 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