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-8372156049-gov.caltech-edu.pp.ua/post/0865971324

  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-8372156049-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe3f03ed68c971',cH: 'jYndQu_6BxsDxb.TUexOIM8rdsWj4tBOPA0Uf8JR.NI-1739213020-1.2.1.1-.RRMDCLcHGVCfyszaxLApJNA_aBZ0IwhL4wgUizzzkB7GDLiDVDRgd.CbisQogkq',cUPMDTk: "\/post\/0865971324?__cf_chl_tk=zSWkn7uCYWj_VbfapVjBXw8WhIJWbXKuM2vB9AWxfQM-1739213020-1.0.1.1-g4uUdk3PWbVQYw2U79O1KVk.Pp7PO7HzJEBMzT2lLjM",cFPWv: 'g',cITimeS: '1739213020',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/0865971324?__cf_chl_f_tk=zSWkn7uCYWj_VbfapVjBXw8WhIJWbXKuM2vB9AWxfQM-1739213020-1.0.1.1-g4uUdk3PWbVQYw2U79O1KVk.Pp7PO7HzJEBMzT2lLjM",md: "Bw7tVAiURomhRg4xyfJmzPfItEroFEAvV6uNVlEJ54s-1739213020-1.2.1.1-_K.18CIZz.FkZvrF3bc9YNpvERTc0MsWictsKq.fWhaxPHXpQbWGg.p6G40QMyVCOVPFFr2zJo5bfwTqhhwa5qjMoWI7czn.pYxmDEaforVtrACtkCGOQDRE382O_O7z7nCM9N_ri2TYsJ5aNy3fZ63stx_xqVddTnTrgKjDFNcaO3uaIoXXjJ07UYdi3nBiprksBk3_RVbPafurDy0mZtd9aPghcL_2a_b6OeTkFp.QNq10DlLt7FPtJEojJND.2l3N0cIdn9NPieWfc3CqmjGthQuoOo6E.pcg9XP8IS2cEg5FF6Kt37q0Suunn7d7n_6WzQgqoeI7lWH.cSTqGUikQa4669KejiI.mzJunymCuPuOt_XJFjY88qknorh7pJVowVcmGjLc0FeGGQKXIg74LxQ57GkJunVqGjU6ZEUDRaYQw8GhbHCHzp2RbgBMm5FNs_NvHrBLTUSbZnm_TkU.DBKcV.ci6sK7PxsQh0vnu3Lpy4rQFQvxKS_t75G4pbI3oyXF214k0P6HF4atq9mVhbtrl0_ZFlqA.D6Gk8HkgPB8.oo5Nu33FSyDtmIg7tKwDOpPKfLlcYHli4Km85G_cCmVLXVHeJZiDwbtgxFjb9UlqxC52qjnlzD0dCh0sUAFpyzNYHgNcppQPpqbfLgJ406m62MeGU5zEI.X2IG23jQ0n_V02UpGR6POJD_EVeTgATj8sgeUWSMJLd_1n99ENqYMDhYGxtJWumde.dsiXcIXeFPBbYhdKC7qRftUiH7qZ.DU.LYg3DswdIDS9JkgF1LgqS7qK3ZjYByGcy7V0bH_eg1742eAqD9dD8dbi_F6TrWD745mpREBQt8PZwi8.WFnFu7jRQXe78jvO4LGMhwjj6CvOfpCtpLbpC15arBVMyPx3fRkPAgyIvpoGfGnceP_zhO3G9lDPr357Vgl0R1.UapfBna5kWFk4brMnXKp47zT3dOPM9Y9E3rZTMPx8.EtMjq1ABORncqYavmRCloIl3JnBvavNkix06SLLwoF1PC2GxZtGBgu_MNf8BY5sHk68DEN_pAJkMJaQ.lSUWdTVSY78W1l9ZTS5YMjVApDANQ17HboqQ1mNdK4DeLzHgX2umkT2o8xAWGkPEhopPqfJ0wBAikCOK4ml30dAdapq7beMZXwzSC8.aK.HB0p_jcZ6BhmeclD2mQpwSuwCR68bfflvYKf9QaQ1VnBghUwTrKiwVgAx8ghcECulyBwXlpLMHRq01dlhuD77duVLV4rGoFlxM..PH_Nl0Id4U0JT1l2LDMH8BXcu8lugOfKFnBHXngPbaba6gQ72AhP.ZIcI9FoPdZXaoXpK4ysG5xFG0zLTiXCRHT4Cq9DlXBfLKTq2Jr09aNoMtZsvxx5QnLSEd0ljx9h11hXrbHm5O__1wCFhyMbM3DUWNhCPpdDcgpce0bbyKZjHWgZ7k2B9pT39J17HtXeQdQxZjFOPyUernow96oHkg33Hg7Vb429LS7JdyXH8TPL0uaD.UPlgg_keUcd_4_NJ1BZi4wotejDHrs0o2IUtrZpCPX2PtM3_hdgXiGaCcH_3Vy22IOjoVL3ydxHGAdD40p6KdTA2UuKATIKugzQHqrcCDjoiviYx_d7RAYMgwAhKtRrgEcwUu8V6hsuc9PhpHDTvQO7w6byKSy944Pg4K728hcd8g4cD7DRAQH2DJo3XGmqjJKiWVq8XUpZ50K2VQ9jnq_jvWE_LFv2IPJiGZCAynkHqWwhXTvOMGEHFoQqgsCCWR_1JoBhDi_WtHnIxIHML6_iaBGOU36fWMT.HipByIHRPJOOdxylREtgtHcQfloQc8k03gGh1qQmoXtMDuTvNyEZ3RgJcyI2M0styVA3mOmEGo8YwOA3pcgRH1unrvlTm896m5fpkpX0ffIzxkxzSe8IchI3jEmX8k8u4vRq9oNM8E.Uv.FoCRkrTPyNXFCexynCg915oLjZycogsURy3yk3q67EpkJcf7AnIrh1JwbrIgRQO8PqhKW7UJmr.0ot6WyfIjiTEcQpiOfSZ0y1v3MNzalFCujsDAPIjrUETCQ9PI53sPCT2.kkK1IJFZL5nz4bYOpEk4T.GEWLchp1T7S0mKdICGTvg_rQCXYbqPFTbCwV2JxUge0So1ThnMf7mERR.KgjTzpVoIN43iqng7POMySABumEELM.cDgRNekUfSQtbUVcm0KL4KMp_6cREmvWYig9hiF7926V.J.41bbtLeLgtHlH1Iulzh3hHbxR3g",mdrd: "ESqYsLq7.X82c50aCBbQBBJ3Fm8MdpPVwSdQ_HnTIPw-1739213020-1.2.1.1-uo0mKWVlFxDTlTS2tqXjE1bmFYnXbubATNgFAEA2NeeP1kRwR2aw_kmfjRPryLRh8lBbT.gcD6F7taQ2HLQ9RT16RZHM1trpQayjmz83n04yufYgHSjsc.l20bFvi458hAAyALTcP7pUcnEjkL7.JAto_dh4ow_eiKNwVIFqftHUXx9HDXDHnDLV79w4KReRu5stIy069xx5.edA1OrJIWqZKRgT2KkGpIia868fnbbjoAgmBB3J0xBRpoYQTwQgDX27oIOw8aCvdcJ0.5pXSlz8B.PVY6qPR2Wq9Ze2hgQAX3Q2sXRWusBd89.69rmkb2A4FSRjRcuVOkaItA2Ox9qiY127NIUYAm5LIQq1NLYcIwXwik9lmQrCEFCdk00wREw9FWpCjQMfiX9pWm64J9uwhl85oTJkky4QSOu.Yj7biLpMhsyUPMuZtOmFfroJbUfYdgiUdSv81cj3jVkjq14nFpz3MkXna.ruN8rXQFo37pCSR455yaf3S.6ouEhi9Kd.EnNDXHYzpDVGFo543qhdQzwG2w8oYN5Gg6DSlPqOqEC5j52vCBwQpSmhwPcZHqLdYsjz9s75gIlN3AsSZh71ykt2TZKovxM58mDyeEOwF5e5UNsVGGKMooJhRb1YPfmOR2jYhSsT6Qbi6txf2_59axjvC9jktzIv4CI4NaWlKOQvCdGsRqex0JajREeKDkfTmkbMLZP2E812xNoFVdZlyweU4Zi.ECdP06_la1miJhwrwCsWXCc8iYKyL2u0q_gPeY5xfw4uqfz8zaQ2krSEtY_dg.o0TUZJOTPZO41zgQV7GbGtr0Vcjwx_oICtnsWchvf0fVBUldU_ISpPOc6ZU8BfO1HkdV_xh2b5Zf8_U19OpORcIwIxr762MC4trnI.UIndVdtTSldagAjcj1z7wrqCCynPo6SiAlBwiTXxhhnci.KaBQu4fX43Z5uMas43C7NBV3RpGC3IehJ74UAQ4SrTE5rgrZKRJpDa0FEdmDgwzC.BkB5qH6It4q84tit3odBf8o.QPfBwn0hi1ESgazE2HOmdEw41MkFR4M53Apin9pQJtCwjPEg7QUU2SG4_Z2f22R26kzBStn6i4MldGC58SdHcbuU6raMtaXkWPcGNn.Z0ekcqQNik.spsvi_LlMdK4d.rz08otxC02Pns6Ik7GTw53gefmhTjZ4Pc69k5pRY6wCgeKsqEyPT80ucLrVYvm9Ya7aIWQGSMTvEz4HYW49b4ZPveU7xfRx1_6iIFpv73avvL6t48v7MrggTJToi_YeutV6LLRTcFA4uNYpHnOR_86JTo.Ly_1AGT_mJ1xcJXx5Zi_3dVzbeCYm3BuHtGrJ2eOx1XnnMu7sI.gv8NvjyVlJGGV7AM90DwwXdaIhzgJDcfy6ANTXHx4sh4.7bXIje70I2q2zIbb2uesYCqbnKvpisNNZjuL8wZsZ_xRnFQ5kJVC0DqmmDDbZ.z93NbIKkkOTxOx2CqrJQ1UAm_72ttxe2szhSzQ7Uwoje8.TTRLNHy91XLVYSlAQJBFua_if.KlpDiO3x_9m56dkGLGU2q7JxCl8GvMGXI33bywKciau92AcwmTEx3wZHnhk4s3.Myms_61lHd9ydeFP57lyQALhK60PQvrObcn18zMxfuthQi0pYl1Q8ibfaF3M6H.jYseX9H2.nksvi8LpBpwSeB14SCqf4APOlMqy1mPooPq9pimYbolUPHIAzMZnkb4Bt7fy_pkl6V00mXyfeEJynFz9O91vdPTG6son7tam26l63_fNgWlnPz9.0C3F2ZIZ0SrvrG_cFNwPjVM8kCb7RpcqH2MX50A7nB7R61FLIPdGrAM5G5hKDn"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe3f03ed68c971';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\/0865971324?__cf_chl_rt_tk=zSWkn7uCYWj_VbfapVjBXw8WhIJWbXKuM2vB9AWxfQM-1739213020-1.0.1.1-g4uUdk3PWbVQYw2U79O1KVk.Pp7PO7HzJEBMzT2lLjM" + 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