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-7254108396-gov.caltech-edu.pp.ua/post/7254108396

  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-7254108396-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9110008b194581c3',cH: 'IQuQ8kKzPGITDHvcvaPiODlN46pEEvhIpSiX6Zb1o04-1739399205-1.2.1.1-as_PKxetW5kALvZLo5lp4X4Y_SSHIoVmmPyvuXbEYB0rktzkvuXHRQj.5K.N.WG_',cUPMDTk: "\/post\/7254108396?__cf_chl_tk=SF4zunxwNA9ojFN5ZTa8bb2pVgkqUMX7erCQxyKaD1g-1739399205-1.0.1.1-U6T_SUjRo_CJ9gCc9jVhqLQ0i.a15HXAWfyOHDafidk",cFPWv: 'b',cITimeS: '1739399205',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/7254108396?__cf_chl_f_tk=SF4zunxwNA9ojFN5ZTa8bb2pVgkqUMX7erCQxyKaD1g-1739399205-1.0.1.1-U6T_SUjRo_CJ9gCc9jVhqLQ0i.a15HXAWfyOHDafidk",md: "WIIxoyM3spFW4Sb6Lm9cbtcLm9FL7KZ.56okt3xCDSs-1739399205-1.2.1.1-B5zgIxrzKI63SgsIyGJExLzabaAIJIdOHE8MCL8UYmaEVIBEM8hGHh5k4xhpNTUgNJFcTLih7mN7MTY.Bxi54s1cw1rTFGJelWtUdzb8HAfWzdOwSXxcSteuAoNdqK3MgDkUBd4vCnTRJdLFX4RSl7xiJbmmm5DRrhmsQZmyCqZ6bk3WoHaQYPiSIeVFJJWz_1e_renb.gcjy2akSvnRIiSiF6HxlMtnyCMofZF.jh.LWV3Nler.NE0CaOAvEoW5760o0Hht5wJ0lCb0zOlM9gv9GzXVIMjGfv03dmegkbRSVyvRlawgfM06zsKSwfzvKnwv110psv.qssGLMkGCw89d0Fv8zLT396VxsphBPaU7vTB9DvPk5D.5raIrMOp4EFLgcWlKWZaGV5K14smOJe_74JSfx02zrkfURCiQPhhIHxRrxiBRhYjzGv9sxzwhRYtIitMxG.qaLCekMoTrB5eOBiigseLOJCby_F0FXU7EpXKXzwCrFKp0YKYE4oXPED6M89IgNGac5pOMoRfpTXEDSl9WjufVYU_nhUdZhkpJM5YQWZ6uEjE1EB1UT_BMj9tdxgnUBIl_w4OhCsTdTNJHCBvNSm.vZO889o7pJsbSrkIbDmqRDfEx37njc4obSsIc4cRhCGuHOtssrX6mFR2SLpE50aEFI1KuqoghmFjWYRsfeVSuDNG9g1SDcyoEPcbaZvWJ5FpN5n9Vpaiz0o2C8ZJzJstSN_eri9UcG264zP3qxdUPL08xt2x1Qk5JjXHiGfifyBeWWF4yHmPYSSZ5kFxJMENZrqXgtPBfjVvn38wC0iFIvosxHPIiug2UmbF9CkpEIprJspHHrEKC5_VaLuSTLP7Ge83EHscsHZfRmUtYbLYZ1jFj5wAILtIo4pS4bzi.2_laki5Efsmg3VjEr7QU9fkzf0_BMf4rxXMUaUPYsmAeONhltjL.LJlGo5TUBV7O0zLOTJ7iAr546rVXaZzh6r1OJzhkI0NRglqoM6yeJxv9HHBq5wBZ0_29TqFeDmFacTs9FnTYGGUo_D_fzKNeSIqNX1MAHxyjWSvR8UkAHmWQB36tbwX9iRdPhnE_cVac5GBNIiMdHOJP2Why9495yJLGfmy8CTbilmu1nF9fIgDXbCutmCB1o9vZ5Am7Y8lWPAE3scmU5gU5_L1.sB_qk8OXOVKQnY4CO2d6Mv7HRYyayGSQSAlTCn5EziKS4Ze4PdTPy6BKTIMX7HvZrn_y8JZqpDNxEKNycovcEXE8cATSewyk.w6HEBENwjVcB8M1WfUf4KHc.IqC7f42YQIetKt95Qb.lgPb..Q5E0uIWS3B7sOqc6n8lEcb72xXRaD8T3WDP15nKYNSnbOeFVCC9kNhLYEdKJZPaIQHowlIcneFYxr98_1Mv5pdzjquitQGwP1tRAIt0s6dyWSCtIrloLdq26UOSs3eJ3YzxTlT2KR1Yygw1LnBsc7k21K3Zamo3JU55dgQmqvBi.ilgTppV5YhOUO1Ayiy7meKaV5RxEqKHc3VTUHdlxW4YIbdJTCkIkA27rjn0Xd.uuVP2AklOMI0Md_5mGylZJOVY7NG7dCpMSZKEi91RU30N993UrQqkny.LJODz8KFu8AREWj1p3IUaN0ZQ.YUzxLjVwkv_3CId7o4rxW8uNBIjxJsC0ANlS97qIYTpDgYBePUmEJ7P6vbwWavA55NSNCRbv0kDKPCsLtr0wTfuaZ8d2HaNdGVBWDiSYlGEiPhk2Z0Gar1IYyWQ5gHOulh2_x44ubP40qpLPahjkpoUrPnUCFXPvfZlx1O750rO.wdEGPBi4tnc0VkjApuIcbz8idgs9xm1toBDnYfA20NoS6JpMNivpxqf2NJqetqM6lUY7TwCQ7WgNpldaN6LnNWcJuszGZ7DomjFkw0YL4lP6NvbYHeeY790KfgJ0rl8.2gFHuMJxePlDBr75E7xYnVw1V3afk_AAS3HryaDvypX93HArV6jBgsJh8cMBimKjMhZEMz0ZFLvzI6dB1ujZbKpU_whutU2ZydWqZxIYP8JQnImjSqPp4Kxm7V001szT2.DTn5jKHW5sINqRYOB6YRuko36TNZWvXvsTGWj4ef7O34VJj.U5esEkvA7vHh61BZXXDMrc7Nb_7D1wl5IvKkHKvNtOdw8ISP8_S9FtaMTIu6xJObOEFKnnrnrHO.9dDB7p4G4d9lfn9ilJuKJCKtmkZJ.6bU9LcLUekEObQnZEZgHUAjv2shauHXWJhmou_mDQ",mdrd: "ifdxyGRWc7GionWUR.NECLgb22n.exeJvFAp14DQWxQ-1739399205-1.2.1.1-ytBiRe2DTnPFmY9Z7cLwnCidtyhldYL6Bqnm50fh9l6CjIp4okBySFDPlGcu_y93wRIGE2IzUL5PCSMBbYHo8V16gO7jNkBmyAXu_DalzYKbpCVnpTlv3wBPck8zlde2MOweNCiMqbkvWJMKsEm_OIxNELlfqRjG24O1SQ.UjW2.Es2FFDQ5.ysnVmVgNmJMCGnOB65xOIfW0l658HnLHAP6qxrUFd8NRYYgqD0CyE3LcNG58KC8j9NFQ4a0lKTuKBijrZCIqspbvEXyLffbYNXm4jRttMiU_6zrXd9.y16prqUv03Og1cJl_acXPbT3extgCH0e8lNmiot9_JkyOZngPYx1l9S6nbcqDsAEbglxMbElWUM9wW2.tg4ELcW8vga7RkA6H_oA7PlukCi2BDcUwNmeAJpkoM7FdvYrRk8VOWuhJhjOGc4L66HfwQJp2.HPHCly0GHWcvdYDsRg1LU2szR6G3yTjpFUhoJNSw6TlaoijZk6jh_a5qWgV1FHrQZZzubpALWuJtlWJPPMW5GQF.nCG2gdtS9tLwJmNFnN7xLh0hB_d_FflmMlRydcg0oUg3aOEWW2wo9PvLhKlYbeBmBvqgKK8sJCneQJLeylH_hHZflBJo4AymFvwSBZjILMNu9A5dKiRrNtRvuJr7wi2yK5q9uogPUQGYqn.B5IIgJ6PYKr8dE64B6tT32i1NnB..UM_k8TUYdCsAaQwuTj3TXzbGvimu2oMIEs6627bCBCGawveHogo9bK3DbQFNgGE3P2DkjQl7hWzIR0QZOSrK8HpLbE0aOv6jGDb.xOm6NFAQxIZIw7KkT09MrHnagoX8VxHmXP3rJ3vSsRNSlQwTVX1E5UrGw1ofgMzSjcKPVM68nP2MEf13Q9xbL7dq3UT_7z.xZmAXmlzbD6CJbqEuVpu0kJBCRO8mLYXAgVDRaLJe6ezBOlokYXz23fBlWad9mKd4ss1KBQBu62gntiKzlaOUwG9uXGrQF1KsPho9KthjFvBL1KvDKGjc.YUq2FTs.Xyv_58_28G91.x5cYfnPMsZZWZJuvSh25SS2EZidAtOgVFo8QcOhX9RRtzAsZtYqFCFwO5kcAc_T_lPHcQEZJ3IVPseBMfnANih4qjdSuxfdwrG0DdiUsu7H_hAd.xp32uevX0gy_aAoXhmfFvEIaJRseTmv9Aw3tGbF91HU_WaB9eew2fRE0pcjLFzRog34mDda21mJiwXVCP2.g94LiVJmhivmvr.WXZPT0t0pxeYQJb4p3iuBaDPI0sb71TiwCMHlgr5a0gQDKFwGL_6CaAAAWeLAn2Iw4M2FtSctxTJH5iRx3hQPamFN22quosrjv.JhktQu9sa3YARtePKX9w1edLo_i4h6FQyGxyIijTXqCJhS2Ep.W8V42517i75El6IQ2SzHYVlf8zjRGLZkEXi5trF9r7dAkYmHQkpxGKAbmH.6wNXbZJHZuTtpe37m0l5h1zOepPVwzSwOP7gYqH74LpOS9WrHS6yo39y07OzqdJJdpiaJgiZUQ0J.mXZ9x0ZRsI28v5GMdUrLLesAKUFb85IckxOj4i6sedncuZxFFJ3jX8zvg.3B..C9UDYqj69LCvlf8AgmyQZfcdpZboqzpKDYsQWM.TMI5drkFTA47HJ6uyifFs6QJDNyIpy5b1htUSxHr0XDt9v.CGfYqzt57grquSc9GamQvsR1JytjWRFegI2nWzYd4YWzGYb6T4vNRyceVYqvfyfqREw1pju22FcFvcleXdpVvJrfX4DE8N0hK4UIDuA0uAR4J5ddYVHw1FAERknZhSbrwpyj5WBweMUB2OvzHUjp._mPg32sI3syaWgXqfcXs"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9110008b194581c3';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\/7254108396?__cf_chl_rt_tk=SF4zunxwNA9ojFN5ZTa8bb2pVgkqUMX7erCQxyKaD1g-1739399205-1.0.1.1-U6T_SUjRo_CJ9gCc9jVhqLQ0i.a15HXAWfyOHDafidk" + 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