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-6359127840-gov.caltech-edu.pp.ua/post/6359127840

  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-6359127840-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910f88edde64f5bb',cH: 'YQnqsrPy7EVt7JLunicTONQSprHF63KZLXcXVbPvZv4-1739394306-1.2.1.1-4bjnMrWKD_NDYIyLBb8CcuY.M7AAUdz3HyZ4vrK9yGLXRysGFiDY5jw0_2IttGPq',cUPMDTk: "\/post\/6359127840?__cf_chl_tk=E2r_picuGojU4sndHkGCfsFpPKqpY07vR6ieeieVjI8-1739394306-1.0.1.1-Rv25LGPndygMH2DH0kLU82xDzbw3WUUQDBLIv3uAj0I",cFPWv: 'b',cITimeS: '1739394306',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/6359127840?__cf_chl_f_tk=E2r_picuGojU4sndHkGCfsFpPKqpY07vR6ieeieVjI8-1739394306-1.0.1.1-Rv25LGPndygMH2DH0kLU82xDzbw3WUUQDBLIv3uAj0I",md: "GEnM3vuY2nsvCPlBOcVjv.gKwa.JYlAnFdRIgsj3HRk-1739394306-1.2.1.1-tZ_sIMkh2rgqNhMnOUPS6nfjyx8kA6c22XdaLk_2t4p1.hBG8jz8f3B9P73YaugyPctY6eUjZrBoOZORFMV9Pbe44IWoJXS4Bq46JgNNIXVv4SAqcRjXPsDSwJcZx_JVtFhsCc7k4_ZZMZ5jaiFO7xut89izDbJhCRDoWNGbZW1WVOLXm16b6K2QOwkBcALxMPjT8fph.YLeFX3mWe4PkPQ.z0g236G.f_y9WdYB.72zn6TOcVniR5NoAFdY2Io2ITtS1AylmCIF.Pa9TvTLsPAQ3Q.XWXIlZA8RZwUFS..qZKXVFvD0.pAyUfF0_._nCj4T6fdDkPO2wS3aeArJXDHavwa610hyaB_YawNwOku0Kfxqd30u0y7iR0pCHu04yHC6CzkFcBCVuDGA5NtMRo9u2NeRVFDAxhrWUEj4zHSYP9IpJMymSR0aaGSCwniNt9drWajnodgaR1peQeJhr_3jhenlmV7FCe2LvZxRs5._G1UzQFCjuRGF_mPcu9ccT_algS80kihLDYbuWj9YZMsY5LLeEPBCh0_xWCn7WMgB9ngUh2iR_mTot_r4Rd0bsH4e6W4LIw7tNIfF_WshYX9sHX5IgPWSJUWrVCKOTTOt299TyR06HD03rAlnLo51M3ZqMYT2d40jqGxETfyVjpIJ56xTvDRqJIKt8QrwBS0tilwguPE1KAU27mBDtUThwxopUuwFIomeHN5eZi4Vvn2CxhqrwHCqPvrTwbidCWLVURxXvc5Ds.XOmj58VcE.UuQD_h2FKtuW6JpzTJjv.H5qt8..y6qH4wHXirgIiYcpXkkewAQMWtjpavn72Ltg18BKccwx3TmdmpLfJorQcQoztmY6ltOndiJLtz16qzF3rTYonNXzoPQS3c4myJUJdHLZGQAsrzn8PBHSoWWKLxK.5rGH0yaU4BLAN4xKUV.Uijkx1aowx.Ioa7JUBfpYfok1WUtEwLG.27m8MqruMRU6q_OWhmW.u_j103Pm5pGB8v3s4SsZL_rqXOErBlvqx5DKIMmjdNAdVqcFveoiBmrAk9rStc7ejDHBJjGnXH40zdzWxLPRgAKBvBxl0orajWJHf7L.zCVf6TSXiY9EDa3H6uY7Ke03ejGr3UuUWyCuwT204HrdH_jiaXD0eqonI6oE6a.iRf2_3x1R1VCpC_5SY3gMq1mDs0UchYU.a8b0_DGcW8Iepp2.gyh6NeWWR5mVvVNvAGYPyWzLtRgJYcZzgYv33a5p3FF06mlY9HOiYWzjhTzFj2B8wPL380P52__FRF9pCbSjHZY3I.wthm3XpEa38YD4U0u50tapuEIa4zQwlCcdjSHM6VZ.0Fk.1ATrRFswOtnigxemEjvoNyyQk_xGPX16rA8.SE6QpfpWNh.XwvpLPVWVW28EIgiRrLhK7sJunzboJcm.Xd2VfD.fLytqQN2anbOS.QrLjdzvSuqtO7BmjyYdz_quN_vR8e3F2h9aZkkhXGzbXjHc9hJJfzXpD9pKUEN86s2TQQqyfmR6E.J9eeDyUyqX_jG0AvLMKVxK5Am.I9Msm8cnxDiyGa7Cfnn0AEGkBfd7LB5rCTwqcCSoHqzqHzdjnEWGDtAs3Kv..gie_KH7C5Leh5tg4c6ne8NEQVP8ZLHDAaJaPRPuKzwy.ow1DTwqVuuU3SGpnGXw7EqZRMDxFlYa0q1vWEAANpPNRWVQ88Fzs4rMmdw6zmkZ5eHvDMC0xY8jdlqpkHs3VwyvpXax6Rh91fu2XRdIs6THgeTKymdDl349nJaoiUSjWpKrsGnoNW_CWI6NalRZMQ7K0JUULD3Fp91Wxei5UmncHmsyfuUebI07DqWMtYkHv.DcSpXDnRx0FxQ4zLHsFfAcuqbRr6WKghkhmQ_hY4IGfwbxSvv._Pr1SZ2ALI8U6l_GHV_YUYxAYqm1D5Ccg2XrtOvRGdFnR82l0E7E9l.NK0yeMCKUPhZc2a1NyZgiSybSFDhrkhDhN1Ineurk4ez34zxoyKQ3QE3HPeKVuqFvJnVwPqPODvZxBxjwM9VfBpDTDrUgWwZMcmLepGeHsrYq1T8lcZDDOUnFhda16s4OoaSMpobjddusNMIHVOKKqlHIfr_fEuTNvOgrQMsgdqMX5avqE3uGKK3LvFO9PHU2CkXn9ENylDdk_MlfDponOpj_YVasCfP.RL0dJjkv8g9zHSYrwRfN7z8nSxJsdmx9..8FOFUFV.vgWZA.2WwAVNGHVfEbBIU5xFqLcnM5UZ2YEu5OzpOvMA",mdrd: "wvzoacyHJoF1Iw6E2biG_kQ6Cxf.RFYaSO2ERlyjNMM-1739394306-1.2.1.1-TrEB_7RwD4zRFnkn26g8JCdAXe6XL2rW9qLfyFKRAT45gfh.afg_uHY11kkJsRTd2cL7pFA95uZn3rh8LlTG9hOSdzf5BOCgQIZb8QVaEHaXJIpRaHAt4TYh9yxVTw_4coD4rhTVGiCOE1R.r.odRbSPhq1WEf0tT0i2d7MI6vPkVKZVEpJPYFC7AEdIkkiPUrq_hX5vKU3CZKblIXWPkx5Buos01OV.aKJdDinaxUY3fUhjtKAD8.VvgnXbOil65rJCHSJEGwm9Q9_sQHYLUQTXSE6A1qfVUAZ6QCyPFbH6jk4QeNlanylKFGn7lU.AU.e1Z75cnwQkDYVtt8jk0JkvW0wiCQ5XFX7okutClMLZaGjkv1uZjR6I04E3rYmNqhPFGwodQL_uUMqinDPU6VPO9w7DRGct3El5KoTPTEzUNTQhqG5ZTq7.fRLr3HqJWgPxaEBOQmGlekgp13zRFYejuDtGoIdcx69Yahysgl9hyi919XX515wviUzQhi4rWW4WRw4K9MgSZQTg8zdk7VmB1EK1mJLapoV9iM2K25dFXWr3Pwq0Hp0TGTJgM1V_8M8WZb_ULC8ZVeIOiWM45WKjzKsuA1Aui._LDYODM_3MnnE.3xsYNz1_0cpq93LaHdGlN7eCqqqqjeWh.QypjRyNgFtRYcF1ssT6oenYzr9xt9FbG.WLVehKA2uT4_4c19QldQ6InFiJHOQ.4p2FtElM15vEIMhOnuTjDbL3afU.eL7iAalpIfSEF0.EIj.0mWrIIZhkKv21t3dV2dZxLFYfHeP1trlq4HcnfSr8NjC5c8K1.DjKtdIRFGAakY9DLtdNGoYgkuyearYBXV.iY7956Xx1mnbEeq.bQH6U_tRYWRasiutP0wo4_O5JV97La0xqpZtREXtQxIfz.1kVOvCvk1crM2csLwya8VArIbvHlqivt_lIfAg4hNVaDkWcH5afISosItae_9KTfPJVKKVRrs4.H2QhXDATsKsnBGJcFCMzy13_FsM4SOU43NhudXBDSoofOIeUkxxKFc5WxkLRIdotblyzMDw0YD7sVem2rNkpUzuNPlJ7krbBb5EYIA5xMAxfRAyq8KfNZUcSLB_002Fnpw9Fh_D31jSdtql0F_dAmUwOp4mm5pHV1a5PV5pxNv_Zid6cvkiFasr6KovZ6R8rp5nE.QrQOg7.Q.PUijYMVAS7BH_yoN00.o.26bf7ivKUbz0ZpR8ZT6lgKAJbZvAYWTLcZkmtYJazzjoir2rWGj_3x4v8RohVFuZ.8LMAiY7l8h6F2vH82_tKnsir.cGK8oGoS8_wqBkpR5EJMZRYjpbqIgrL2IUH1hEM0locIQX5Sg33IzeqWq.4x3o7DUh3Rm8tOfjl_ehk9vw33hq7Wa.dqCdSimxmikBcHEhQACDjMg1sfQ0Q77dosVKASRqXZXbv8jxNIgt5IDhWP8GJDIbb96kFNL2BM7ztjbandrOmBeNr7XTPjdXn6OmjXknEaYyGxBSYlTyb1.tUagrYEgJzxxfctXv4an2CPGfYGP5jo9C2L8NtSkips7PP0k81gnLy0swQeEXaYGrpipaC9HrRttPXatnkU2a253aSRqxQIHKpmrqJ.0cejWBpf2q8PIiESsoaAijdVgmrTn92F0F6mucS2dH_lpXJWc7SHvi62HK.ZKVbeOVkSBo57sHWb19ZXr2HS0pD26wtCR2NBukRI2k4u4SdHO6ktBYYraI.M.eg5vP1ctxZxoCdkCgfr_NNBsddnqlvU7dSdPRafue7pmn9OFLIzKGhhAMd7TDKyjIIviSBEHXz7OitrPuCqGx99cxTMtqAiC0"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=910f88edde64f5bb';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\/6359127840?__cf_chl_rt_tk=E2r_picuGojU4sndHkGCfsFpPKqpY07vR6ieeieVjI8-1739394306-1.0.1.1-Rv25LGPndygMH2DH0kLU82xDzbw3WUUQDBLIv3uAj0I" + 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