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-3914267058-gov.caltech-edu.pp.ua/post/520674229097

  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-3914267058-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fd7960baa5d6c1',cH: 'F5z.d6oMBl35.PueOjd2eaRYqTbTM6zX0M3h8CcuJ1Y-1739204925-1.2.1.1-HKVtdGPcW7bdJaHFZ4Ti.AVPpBcdIab8STUYz.Rvg.daSVNgTudf1.jQrfDACX0d',cUPMDTk: "\/post\/520674229097?__cf_chl_tk=irPhYpVIlFoWXhotEC1TPKAlsN6zdJaCvUoZgUQ4SZM-1739204925-1.0.1.1-QwwSDgwfZVD0_l32ph.Rv.scsygZszBirMMHe0NSqmc",cFPWv: 'g',cITimeS: '1739204925',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/520674229097?__cf_chl_f_tk=irPhYpVIlFoWXhotEC1TPKAlsN6zdJaCvUoZgUQ4SZM-1739204925-1.0.1.1-QwwSDgwfZVD0_l32ph.Rv.scsygZszBirMMHe0NSqmc",md: "fZBQtgLD3ixwtftPVBW4tHw2klfsHMKNvvKctrB76yA-1739204925-1.2.1.1-Br6IwNU7TWlAgLWK0ejpbddzybN2AojEEVqCa0f3hH.oRxLGXBLugOgjBlEhZt7ECQouHIK1FzUNdkcyszc.06kwKhMueFjHk_ohtSxmbPTESJbCTAxQ448uweZYAdsABkmwcGRVYIAOsPE29Yf3NWfPRDPGEWEsstsDmypUCaJ0oY0xDlzjs4pjqsL3.BLYQcenB8B5tO0xk6L.zit4.WGB_AYyp_baXUNTLm_mupzdIgJpYUQ8wlq1Dc2MwMwtaERZDVxVmKXgp6WqunPvHJzvwdvilQZYP7JM.p1mVCYIkk5fTmYzX2kCrksd8poRf.FRngv0UbDvh24iskm3BXgd0UWld0VfegplQkjSf2B6brww14w91EuJYktsjYRgS5q_fMWM5qGcbzhFlbzyljMhT1z2ZyN4o2STVymSJOF4SsYic8AQZ4RceUhjdjPFezSW8C7X0Ig6hEGS50OpR58WxzVnyGXpvyvuu53QHuh15NWJiDFl41QitIeVn.PiQ92IouKR_bSo.pIi4ICMFLfdMi5hJ95mTPoeV_hC0zFxdyXbXvWMLqT7LLLIkCkKMEak0VDnUY.kF9RjvboDUtBvfGNdMLrY6WedBYGcLED7leFbGbKN3Rd0bbPlFZbrysq8JjSa.TmQdNDWk_cneej1.mxDw8w7qRccIRFGjQOgFZ4dIDm9n_ctaTrz4XjvHPCOpVoxiHtQVoSpB0v8beWlb9SC4VikQ4mwyd8oXp.ci653235wzr6sT50fhgojR4L_wCPMqTq_GGKwUHq6lD7zjwQKonCLKp5EyLftJ8Yk4JOi.73hXLZSQVckVxIazwLdUMkjyuIDN.9YHh_rO.i7omwHcrOTO3WxuUTHenl2AfTmU4hpNY36okRmkOHQxG9wO5jK6UeRbwvLrfoFrO1z6gSbpJUexpwLM0OMfkhq6PAyuZ9I4d_xsJWX6XzuEalPxbJcroL6GA4b.F2y4HufbzLZBaMqDM4AtlCch_080Y6DghKJLbKSIl7yTx5SDoIWe0pW0U_FtcnGBCWipsOxYXzEyuHDV9Lt4XrcUSwianvxLOIipQF01yhMPnJjA4qzhWr0aBZ7KArXWhXfmjHbkKp687CdbIlX5Z04Mb38T1lrRWE1NSgMLLhvHHUmUi5Rs5.hZyswON1Dzzm8ARld2RmM_VKFvE4lFpqNKW40rPEESjpxhqZapYJdF4q8gmfRrP5tAvh13PscJsX6qigcL67ASGbKIXX6XqPBar6y5o1DAgGpkROqGjg2blnRpSCn2LXRWdYK1wTEAYkkWUNhRbHjcWH_U2tTxpytR.ejpSCjeEwTrCapq5ClISH34S.e2rTK.B4.y9TYUGjNL9JI232e9Q.MCaiOoSsxsHU7PpJLUUDPaE1y0xlffflyhBlDvESk4pa9tj3NAdjQlWuuNZLuApByW1VADERWjs7tTbDUCSBAcbZH3vhVkJnhjKrXx3aNAilPBb_HVBhSgYKFIfohrnE3lSF6z4xL_tOvkGmT8LO85l1Ri2nHYA_GsjZ159xQ36Rs6m5t3hCbiQs_Vh8LVXKzzsen4i27t3SwZUvRhfCo4tEtQZtLf9qvLI0ttbaEXiDiIIX70376a_lICrvP0XvWT8cfNVKUqrIBqB89LLiSfnDSMLkrRZWd6s.Py1LnIToDEJue20P6idBQ3asNhBxNhGBYoIMPnMINxYaGwI_u1sBFVS4UiJu3.rx.m7xmuTbUEGMRECZ0UPT39aE7VG8y4WTxw8xdpi7v80dhRKwbJyANVSltfxKuOx3GqhTxUnYga4kC46xf8u77L0STQG9kdnqEg6FBPw9a3GqmmEa7J.Ls5JGXIotdlskarrE0RjLLyQdatt1zhGsi5PSVhG29_eD1ArJ9KjeavBCMgGEzsZLeWfhBKW4Scq5Q2NRt4O_f6660.qBs6e0PNh0vVzjCQUQ7IYknnbnh227MSwpsGfOtCsXAI9vyVy68cgX284_775rUT7hQ_5rVyWPC9OFFZRCi4VwB.De_ebzyTSKaIf8rZv2j_B.il.HPVvhR7ERlXKwLZmJ4K68D6BVHg6rpoej142m1SH1u95hoKdelcq_99_4vBQIGlGhjWulMFYexYZVg0tNRbOSu_lPh_fmjWQ.HAFoZJZxKZDs7LVACJ3m4WDKiDm7pqdwBgP2sLZGyGJUgXANpbeQPgbTVGzPSoZDrAbUriSMa2c1qEdVM6jEROdbvf6ySlGeTcsiz2LfNuhinRlx2mQ",mdrd: "zhZcpwcN_b_lN8lXkAz.bifBfDvLweVj4AiGwqR0n18-1739204925-1.2.1.1-st1HWMGMyk6qD6VvOYw.cz8aLg8jbAHRCgB1o0MJB4SkTwgaAbJclYQrde2r6CspsVODFPTpvzwR3id5Lgs.ll2Ir3bqq.Nib1cQexvZh6HjBqPXKW_qZlhxNp064zgt_YD_4EjWNRDwv.sL3OX9i1ik3ZtrlwF61y9s0TjXyb1Qso5UrfL2jkrgIwK1Z1dkHjwxCXmRkTqVhuVHAhHfUMjADSllRcMRG8lY2pwlSxLP01zrjSXN5KMDuii5CWGZ8d6bPHAyrOhtCPojnsVKhytSPQhDHG2YXdxMQt0Qt7kh02kzlmBJskC3JjeSlNUnKXB0rAOBjoVifk4OG08R3KUZCqHNaMIo_oDz17RNV.gVTTI5G3wH5PG4hq3uJWg7bH_OI_fFhxVvzX6u1EMg1k02kBhUx5Nvg6vnk1E1JpH01lezTHUbCRHecSwrgCjyyfLZk6ejkVRbT3HfJpNBC51lgTiVxJwnZEM1K5apBWFWu08hs3yWiGN8UkVLeUmfIaOeorSe5KDY_mzf9IH8PX2WjjxbX6B6mRfQr.ADJ2XzWt0DBZ4UTLfek85lNsrrSaFLwiWGIJoSG9G5FbACh5qtZFYAYas8jG_v3DTOZnNJPOfhPo68_3AjEnyd5lOfPCQfJNXdv48yZUlrKw4_KxYa7wSM1rslPcCwef6pJD66FSxpysy9uZ.aKB3CewWQJceDuVTyS3RPWmVwt41mGlG0abC73.ooZPnwIbqzT9kXENpQBsjwL3ERuRF5HgyAdyCdCJMZYu77g6z0ByfeJi.XCOnpoudvnWU_IdwdM3fHiL2uD006e3kMGVpz5GPHGDp8H8ms9_NjrwFzImF3qZltBPet2m9qZTSk6Cp.p4dnG10BYt4jGkrCfUr4gS2p7uFf_WgddSkIm_WJPC4wmPW9R9ISzGr4nuvsMufnHuD4X5ZDkFeZmWyl8vQwPlDMb_V1cSQuqP8ZUFTtPEBe8dXfgF0YkKSCw8DjViT9xDVNMJY.g7bD0PQX.f45kNZkLl1fwv_BE9ERrogS6PygKf67mhCbSoJu0Rj4N_kpxd5bROiF4wnMQIDJpb.mFrcyoDAIowmSELitHDZHgte.AeNUxPnqViNCHaMe5QWJRiqFbykRAoctTTaU5BAhBq.8A6rnSc7oUT_nNtMbUtikbjXkgl788zU7omiXEg7Vnjzkte6VjSBGw7HEsErHx1QVXgqfREigaSkybvwaEL.B.ONtT4SDHe3SlVTsF_12uGHKm9ObZHWNqqk6jAljF.v8rQKFgBsUGoOaw8xgUMLBzj5KbEAH.L1iJiu0B73PWhwGz3zfsEhN6ixGyecb0FDgptSQ_8O6eqa0aWZAWCuJrRnYE0l.dvxLq1rFggN_vPusT3iuvFJqM1H93MBsjXDTrxX0EBJhqhAbXFZGKdSIV9fG8K5EhW9rZHp4hre3G6Y4t.nJIjff9Ab8i5PIYDzO6aEtBhekSZuVel_M03wCpY59Qy5VR0pBJgxjyZ0f9MIjns7z6q3zBRdnIUWdoibN1kSaCGyts2BuISTym8ngq3x..ptdZtGyqIIrqYklYDbpKNG6VyyuJ1Ge07KEgxuaNR5TtVZW0IsrF1MQ6UD7_Wk5T9eoWZPj60DwGhFVbPYeNR._VbxtwKQzNMp0upiGp4Ypm9IevMKqqh4vwQAdca0hZwGJ32aSBN4z6nQkypCfHl0AAUvt7bHl80fV9jsT09tUKPPN.ZcT2LdCEG9BBlkmq8ZYFwfNTw3yx7T538yi2p7a8_xLUB836T_MuhZixBaDPWwh79lTeEqLSAAjpk_JSpube.rfC.6jPbLZolbh2GVSUFHZeXI0pBmBsFq2"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fd7960baa5d6c1';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\/520674229097?__cf_chl_rt_tk=irPhYpVIlFoWXhotEC1TPKAlsN6zdJaCvUoZgUQ4SZM-1739204925-1.0.1.1-QwwSDgwfZVD0_l32ph.Rv.scsygZszBirMMHe0NSqmc" + 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