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-3052196874-gov.caltech-edu.pp.ua/post/710130610325

  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-3052196874-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '91013460c931594a',cH: 'Ju0zStaHaeYLc5A5vBGJQNb8l7OSKKPVXcqLymXr30w-1739244042-1.2.1.1-MWO7mYLgrOGUfyV2pTJgMUPJTboCTtj3Q92pctZGfLgfbJD6d1aiF4WVu_gTTekk',cUPMDTk: "\/post\/710130610325?__cf_chl_tk=.3da.mX2X.9oeJrv6M9LuBNuvIAu8dQ3PLeMbQyCiyY-1739244042-1.0.1.1-FwnHhnY5zJ0PVZ8DNbzmcJdXQ8o58sSrVcLpfosoH70",cFPWv: 'g',cITimeS: '1739244042',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/710130610325?__cf_chl_f_tk=.3da.mX2X.9oeJrv6M9LuBNuvIAu8dQ3PLeMbQyCiyY-1739244042-1.0.1.1-FwnHhnY5zJ0PVZ8DNbzmcJdXQ8o58sSrVcLpfosoH70",md: "zBbVQtOWBpe_DcgsmjHw1VfUGjVHWRx4uRBaFG60P4M-1739244042-1.2.1.1-0Pn4S9lwn2NjvKhrp2VS1zJDD0OEiii3STXveUvdQefooCZyIkxnv_E10RSAJqcmJdI9CViUmbLb5p7HoifL.1662zpuHlTOlQULeIQQxWzLnEQb0_Z8xSN4JOToe4iAK9OthdPoYb3_YkNVpkWAQkKbVykr2e6224cFotPYo.rx4x4d6LYJ6KAzYBvQAyrep8r4oAxtcyvgdz1EURxqFpt1PWrpjBG7W77s9jmpPUegIKrtPNn1cRumS4pc8augF4gxR88ZAZFOGaBxpQOzpuc8Mag6ofUoVjnmMV9P1OstPX17pXze6bf8a23ySZnWygLvcmFQ544H6RRuJzz8JLs2MJW8pQ0aSuCIYxVIA3x7Re9FckjSlc_X.cQYmXGCsGYEb5Ybi5ITo_dHLf3kaqhKNKvTacnOGb_O1sKmJrHtdHwlc81XDdwLZVzfbMGT3yaQjngoFkxW4chjDO9201ffQige6FjdPfV8HsV6NuJYuj9vc7QyOEQPAq_zmvEwWBhVMj_fRR5WjgNl_1go6iswlRPWHzfXS4E3FJw_M2Pjhq18Vgdd0iP_kFpZjFvdvgP1TPqtDLEKAnuw1PKZZcZa2GORZ0JoCKb5OtEGR3Um3pMOv4K52.OPEeeufpxRvIpVpmPRtWCXXUExFEIMKy82SCF1PDvt9wIF82vEh0BGf3IYNhKK8vU4Oa4T50MfCT7lxOg3kBu97.xINU9rVzZ9c1q9NyEH_9zLj2vEl87MqNI7LxSU_HQReq5ok8T4e2kHW7Tx83mb_Qwez4FDIYmVgNMZBO5E8EKug11xd.CaIbL8HxE7bjg_FKejPLUfzJOFaUMUzf168nAVToOKMF23PQLnLsAmTU0Ifaw_w5YfxoFViW8CE4hg_VJ8ojtNeOtHvOr6HJWuCwZ1DRx1BaM80VJYuHIJrYrROrKYWnnUfqmaYcioyvXSx8JojDZiYLLMxF._uAARo0fJAV4_Bh2rVXFTsvCSdSSe_QA7dUsIvBuzvVzbmuLCDRBoycN7r1hSqNnJO1cf2rPvSPdkjJD5XgS7BEhNGj2qEid9PRfJW4yRxhJVrql1qkE_cCjc8fA8ODWDWk.xBn7ZInG_HvueyHVGYLG1azRg67QqdxwTX53LAXEf.c9UDthfiX6KpkyXTIDyGWZacXMS6tiapSwTElG3lq.R51TzIBlCoJZR5rhOH8LIAeNs7bJS0vWm23hrrJWhBGciOif49eQzeVycu7rd0RrzJnUb1EVn1pjX_kpd4zB6vEktHhJd7VzWp9sp4B8ocVQRz2YQyxDbg8EcAbvcmvB_UGeKd6bUjGehJKbkGyWNHd9QQdrTtibLsIrJ40bQ8Z_3DTFKR5p3OwXhMjRllTemiKCmXyQAg84PWKj4CqNwP5e31L2axTQ5Uyhi1r2zo7nMIKRBMGDvTjvvQoJf_wAa5F8jh_7k3ErR6RSf1_sem6sHSTFjtWKICl7ovVI5hyCloPqQs4LD9KBAFJlgbE6RV2dG2jtr0aMlc_.IDIf1BomdqB5OPHd8d7.XeRqwLSx54.EU5rjwFi28u3kdSSkWqYuLM.c0OtqoEyKuQoVy5omL6671h2A4sfnWQ4rZ.YABX.2DCNWdbNvP4k2rM.yGuUR7hGkM.wmmTBx4xbR6CSuc0V0p_fkM6LVEXpfs91veiHDkUoL9wOEqZRMLTRtLTz2Jh.2yPn.9QVgXkGj2crEGMUwn.HCnBwt1Gq9qOKg.SLnT1yAcgTr74F0m5ycqSo3wcfmmTgA4ZSCpzYmGinVRC9O8K8oDy6Ik026Oh14osItln9sKA.2ea6t3Rt0iQgba4Q4Yv0hCA.ZkP8e9tRomrBG2dslv0ZMU536qa5vxOH3AU1wf2rNeiLKAO1yQ8aFk5QpWaTZeHpRguBT0V5vt.e4uogLnzK6P3lJsgLHKYiUgz3pl_BVXNHgaUZWEyGsqL_6lqCrE9RrWKlakVC21EH1SPyjsO3GCw4BAJCwIqUWJQ9L1K7JdQYnMyhyRuEj.A0SrqZjdJWBRnyHpp9q5JcUvMswCYOLaoKJGPB1XW4K3AMzs9v2sw.VsCUaOFe9fj.ePQvmYNVS6HvfdrRKbZvFu9ewlIAX2KRHYsP9LTLaOIgKjJ87yLgc5AQ.ZpJCN1OebM2JEtp92RH4VVN.YfE7hzaBcDglunFJ97jGKj2vaFMUVXMeGq330u4VJQ.dNAK8Ydi45Od1Jnp.WOC1Bf.s5v350HYjzHNIUi2vfiHLGBUImVQ",mdrd: "kk1GUVVyaF86w1u3l1d2mUp_ROScAY8Hkc47.9jesPg-1739244042-1.2.1.1-6U_JaN7hEqtVx8mhEv6aqeZmpWEzg.5w56T1VAhraTzUkioa.vA5OZAOY_7aQbqmeGuXaZ5IsCaWCo229CzbRLlRXiZaQ8KqKjz9BHTJInZFBCjD66m8RJSYALBNNE1.wO4u_MVnrlLDwLjwg0zhcvUw9Lqar9Xv0.Ufd56fdtklaB791TaCEQFEGDWmD38bo_E9bh26iqJTTyuX601locXU4578CFEn3Sz6WG3eAUE.gRLG5aohS0UFauIfSILyU8Dj4EnF_VvNGqZIwaGvaRLrFZ3HEGl_ir4GA50g_gl_fJzz1jVxlK9MBylL7G_sBOvdgdLb7XyOD4XlViM..iGL5CbWvG71mUoSTsi8RU0A82DY2wwSvYy7VJmrNb5r7Lzf6oOzoS36nWWDLkCceYcx6cCwZLAZxjFJ.tI66zcci6ldsoO7.iyv9mM_F6LDYzGskeyqV1frflb1_xngNOw4epbN.MobTQ9PxSb6vs2p8Le9p7R0x9i1avPmw_YiIdRjw6Xtq6rbsXO8L15DdzBpbtNBnVcl0bnG2vW.TU2iCevPJZ3R4BNdRPiV22Gp.Nilmo3FTqYy2BWTUs2kcZ.drVTd8I194ZEYyw5swEmRYDREhLGGvgH9OwEP7VcoH99N6ILfLnctN3GEW7j0AL.BFpAbiP09T_I_kojx.xMLy.1GXAo8WiWL3Ds.3jc47Y9iq379oNK9LtuseuxZbf3L29t0kr_fH2POBZJ.zR.9NlW2VohNfS_NSfFKIB7m4CH7wasXzJmaBHk1rTwUIgtkCtjht5Kp3pho3jZzTf8YSNFbLeZoHoUSOVMne0NGvmsTYGkleaMIGfLqGUHsGGvf5E394.4oXxcepw1eGCLtt6wlHX59JayDyNUuLur9cldNpULyDCTjzWTstxTtWRG_nnJpTJDOkzZyiRa_abTSjYVdkeyaH.zrPATzYeeOh1vXKoUJVLSUtCNE0AYjeO3V4B0IA_705LyILnWnqHKMVKhpH1n3FgDsw58J5AyjH5SkM6iPuXo3Fp2Jy4wtsaJJ0JhhuCiD6JIqNHL77n4PrB1ZRR0eTJkclxZoFW50PXEbDYesUPlOeskBGQw.U0pownSW0TN.A8jF.fciWpCq4xFNfC_xQryE5zVftSpIt1QiTiNd8Wgw5d10rREvEsCFyMlxCAztSFe_VzUr9M34Fg2Qdf_k6cJhxQzJ2I0S7QncyeqbQAd6LVJTGRCqJ11PeZGpDfNZoxD_724N6P.wmIAzl0XlwURrpqH.qeS8OBGkAB4k9v7PahZ.oE1rnLYAkBhtiMAWKYx3YNKBFECz1WOLOhiLq9CxxhhAOqQWVQu8.W8oStSpQgL4pDBqdvA9S8lW5LwXYsUGYmmcWS8wtYvOAKh69mWNFxkpf37OH8vR314utF_1w8qjABHMUrQldYfNco8ySEjxaeK2rgV94P.4d0ZapoXLhg6w.8Gadt_7TM3Mi8tMs_MiLELicwDqwb9XigQN7inWRlJ0FwKmakIKte65YUCrIh_4_fZEv9RfFgfTmYaj8FhmZJduA3uxqffTrKm197PBbNjdF3aM9AZRjNX35cGmNQC4_k6cU9sxV.9Ug0dHjKsh.oxwZt1xWVu6.jBqMsq0uP0d10KMiD35NiRGoNXKNHUGHGwfa0V3vkR1v_LOwTBCPcIu3_4flmQn21gZzgw81IrzrgAot2tPkact1A.kQTHpeLz7nqru0jrHrVHz0y4oKWFXRBTHWw85AReU.dZi7GUpqbrcMmqkqU2lmKos_wfTsSnsLS0CjZYw9dnFyUT5EA1W9HnLNt3Ui2kY5qJdlOHyhtuSQW7svuv7icIOR_9f7b8F"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91013460c931594a';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\/710130610325?__cf_chl_rt_tk=.3da.mX2X.9oeJrv6M9LuBNuvIAu8dQ3PLeMbQyCiyY-1739244042-1.0.1.1-FwnHhnY5zJ0PVZ8DNbzmcJdXQ8o58sSrVcLpfosoH70" + 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