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-3409781652-gov.caltech-edu.pp.ua/post/3409781652

  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-3409781652-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fcc97d7b163b1d',cH: '2CKOl6FAM0G2mFaIw2dKP8cp7KVc.N57lf2lLBRTH50-1739197721-1.2.1.1-Vt811rur42c3wwhg7UAFMVvMy9U9P4vuJnPLmqd8sq_FA0kweCbk7I0mGF.8IuWj',cUPMDTk: "\/post\/3409781652?__cf_chl_tk=apj1a64OALjoD8rSKRvSnGi9Sz8.7QVVR4IJH5BaHqw-1739197721-1.0.1.1-p4upIDRm5SnaKlzGtXpwTPesMqW3PeDPqvD9YyLkRS4",cFPWv: 'g',cITimeS: '1739197721',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/3409781652?__cf_chl_f_tk=apj1a64OALjoD8rSKRvSnGi9Sz8.7QVVR4IJH5BaHqw-1739197721-1.0.1.1-p4upIDRm5SnaKlzGtXpwTPesMqW3PeDPqvD9YyLkRS4",md: "X80gGOmCm3JjyF0qVNfqkGV_QX5emDbva72g2t4BqA8-1739197721-1.2.1.1-UZVVF7TSmwbkI0JZNaFll64iaHSFEgbBd4J4TDigOxSCRf6SJ691WEzl77sOkH5EXQYwFp1Iu099E.FDs_jrfjBCNvV0iawfqjwVKGKM9JpaHyVxwy_XzWDnB7R0_zBUbKTCP4Bjphu.daIucmdN8O9Sw1muIjDm_EPOi97jkINgxgAv0PLUnpQ0awAv0.hhiKqT1EEKzOH2gbxzRzN4EKbXF.HHj83UjyQnNqyU331CIxIT0YnuSewxcwn6Bv60AACZIPYJAQHSnhRwDMO51m1DWbjadSAPnriK24sllc.8hX81W1No966f.yOOIDlwpX3MWF.e_8YxLXwE6v8aN3Z1CBgUuZWf75IMAb7qXrKUYf6bFrnFwCpago1kSvLmpnKWgoe4oXCDvbCM8RFhNGyWYRloL0GyyvfQYqE5fPy0XLOoCoZXlyyYW9XC2b2spRTS._LYZxRm0FY47gIZyZcueXxB1qq.cmoKcaewpvuj77WGEb_zYzhSK7GP1L_VELAjpbMVTP5K.7cLQbi39imEKegi8JTgEY4bCgMUJJ8wi1RX1z2261Dap_IYaThngoysY9fmy67AFUTfx4VnVdx5dquW392ilqqh9xK794Bxse5SFGOnp.IfmzxODvjT9mR9PRkii4jUzEAn.O.zc8ZRtGgw4cX.RBpEB0NC0MLKl01.5RxDvrBLyyqvHueQ.9bBl8YxgU3M1SZSYbV.u_YLilCDfnK91.QqMeArv8nTi.8vashnHo8pcUYBZvvFL4Zm9kdElN.D4LSKsn3TolYGJ8FPacgXh0aXiTrnQAMnT5GKWJqi5CATD1FRR7915lPiBWRXQyNgOGZt_kVVnh_3mh.1zvI.TpGoqWGbUGzA3lKel38qeqDxW5SX5pGOCE74EYoWpsMMWi2F2QZKleIHmXU_AwMKMIoATFS.Ne._F009C8ayJxM9FFF09_ZymGnunNvqKFJ_STa1DPpPbs63GyysVVYFaZJ_9kpmWq6_RO5YpO3n2s54Wf2rPzG45jeDJHI2J7PXLBv7jBVZKc__sRsQsKgsTUKmqp.HDWOKLDWWVDEo2SVWT3kTTAZ1r5KtglamA9r1Pu2ZzyzEK3gum9f7pVOit8WvT3rxzx8EVXkGzOFWdJFEBeZrDsi3pq6aISOctBkXtgWzoqCSrSsNMwdojE1VnSp7slG3slb_b0i7N5f96OFyx3M0zbH83KIQjrAqqqaAUrSZEjyZX9ejs1T_1_2uaxjX6ZeATS6EkeY8rkP_8nvBnYmIm2Le3J7P2glQZzF8M4FBV9AtQZ64q1yTohmfcZD7LRXaFw0XyOFjL8xXEBUBQBnnsX5ntQ3XLTTXK_zwjvaHKeenPH45YnhoORKSbVZcNQ7b2C7ddjKFT2phZCwTtN3eBFiW6Y6FUy6vud.bZ1yQMKphfFvOs4lRmNNmEV5YJMgHM.NlcgquRVJql45a21GNFOhYB83X6L6jEqT_VDr89xfw.GdcVH5hY421b0P7knv_l119ls4G8z_W1ktAsLIUnuMj.L.KHtVUwklH0G4Zg4tCv6KZcLAaT3X85XxYw4rj3BZeYMUY1wwG_YgmZJXfgNgyE37h5wlE07qgqNVKWevD9KBFNmeCOSmwpZbTiq1LDucAlFUN1tpHKFUGP.oq3rbpRkDWH4We8XkuDlVRsqL7x5L08nCCBU.wgwvIXPFCumk0pnAUqw_Sb9KitMZRnnBnZm86q64xaZ.03e376rR1RlFkfSBy0dMCR1NGlmhKPA7wrCyPU.LlfZJWbAumBgsORJj1fb1_ATP4sjU2lImtQwaCoqI.GYPLc.sefeUgiMRkyJKZekRUxFjbGp1kY6LQOUCyEa5bcQ4TaXCph3HjIYvifoer9dsxdnGTT_ZP35xBTYeR.ye83yvm.eOEd.w4rGKjv3tBmhmVxiasYS.Oeh4WHmFxcNjGGnWjTMNBFtu9UP8U3EkOaD.E3F6bCFCo3gjifPSujKgAuNK1K7tkWUPW1n1E_fDjC9UIzBxM5G._hIIcQg3rRjO5FzN_iDAcXGU8ALMU1SxOFkp4SUOJuG4m_PQsl11rrUAVn0073q1_Xw.IBe.TGTFwl02ErIjBuDMobqoGtPaDHeZXh4Tcp_wnDyFRveEqrttPJAHJpXBGLk7CSymVQ3Z3ilGG52013MdvlVeJrZAA335e6IxmHIX3RNBakTVijEIUiQmhnsPmED2DHybyqUuVD44rtnhG4Pedx9gz5OOTN2cWsBMp2g",mdrd: "j.E_JkDAHHBEFdDc58YHHc_lSRWAT6ShNma_8q0KFq4-1739197721-1.2.1.1-rWybjnjbePiMFqCKhuzQtwzqiSaCEAJ7s13fbiOx6e8H1WC4JlgGybX4buPVsnfOulVgJrDvZnjcoVvM6ek6zlupa79ooNa_IhsNZF9DELjcYpkb2WOthXWt.NhzIwk82Z5EckE_foBXj9n7tsNOCaODr4E8KjGbgv05cc.jW.2PZs2FMOQQ0QxJuNeJ9MzzgbNLSbd7kj8nER_B1WK8BMuGYbXR_R_DgACP46lOhWlgp689UGbOxKQKNgie.2PQoDCdSRfohK.6ORQ4jllylI5SJZHoH3zTtafItM4JJnQrqJefsoCFrxcTnHrpgyi4xAfuu0Eclncjovx4oQRjEKiptpDwh7n0gB4xFJ7QCVzhV.gJvhdebE9uIa.u1pCjKkAHLLMZTktwIubQ7IZ1pDMgr9hIVHPtYGp.0GMH2v7RFriMIR613fWl0fQnAs3OXl6mfhl2679yJlVWVgZv9r1iLEdekBK4PouIzxXRv8POD2wO86We2n1y.WPaYQsuIVcD77wcw438Hxwgl86D5hBsXOlVW2xkZj5B_xk97kPOOCSEvD.4w0JHLDiRJgsFGyPLqlRizJR0X7fpyA3.Rj6L3J1DzNVV20aswrJErkQGitPFol4kaT3dCPUZJ2.AHOSLOWzbwiAMwP8KnbZfO.fdRV3dgNozu3s8ZEoRE1NH_Fxzhj37ybYWOYnzvGfu50ARbHHIoRVxp2BeScHTq6BVSSenQQ6zHh599VmXkEgiGipq8Q8cxr9KYpYsSJReD0ZrcSb2X0RxoLxn12zuR.vezrNcB0w4C2U.mjez3tEeBz3.ZHXTePgHgknAcb6bIGIB5WK.gcJshUFUfjHFbEj0VmC7ugnOWMyxVpOsPrwvpf7ey2TAEa6flSfVnCHJWHTjSftwCTAFkL_PvDPzYxZIAsnPzwwinykm5s5bt2wAmQXIhcr5pCoGoerhjrlFu98BAcO17q_yZ1vZ9DI6oTrYZGlAOZgC0cVBafN79l5SBVGjGy70V9gK16RPePQECvGlXAC4zOAEtk7Pbp5Biay2YQl5ZEwWkUdU5I1gdEtLn.Gw6ryA2nkvdBSxfuwQlj9tEpKAqkC8LKoSNwXBbqTpphit19PAhthCrdwlMZHh.CQTfyAAUfyV50.aL1UMxjKi9pchPmKRlJ9OkNykXDGpLPi_9am.0pyii3JzVSyD1ufSGCU5WbzSS0cjYGo9Ns7rDIYlF72xvFm34CAPhJMGQo7KScqKCvq.J5Xg9ha26AYBnzsg_AEK1XnMBXzB6yPiUpZfckeF6P3jqrtbKrpzq0oMWitvf9Iff8G2cyVdYQ9PX7HQ4UPq1sktYoVLQJaHdp7H24cyBTj8HJ7CMII9NBpVW85_0CMY8PUzugw_Jge1Ganpo50HkepWkGDmiCqwKKm2jMcWScjrf9H4Fkf4KGdwpxhArdVj8_H.Py0CQdRT_Bpe.V6pSzzA8wn0fgKhTKqThdh.CqNezsbx4Ct0hNw1e5j9GQ1s6ISv2EAVfnBGH.5vO8y3cPfkQCJDQsFVKA7EsoG2Yi208qUGm6yFE92m.iOQ9F2gEKmUJAgskt_djrpsJqxs.vw6BLtpRv78VKOhuZZBrqqt0bLBqS4XOiL.RMBsBrAYY.HeoFUVA2M4fUx3x3tR20h90KnjWBlbtledWui4ioynIhb0WJvHTjuPvKH1dFraySb1AHVUvXP_hMb3d7rlpJoFt8RtMXT0O8KzGmhem06_vJxZMMN7IsQD1iWUCe4wC3CMkgll3dvhp8ZPe4V6GbKtvHBnPTq3xSQLom1VWQx_9byXT9..wljMg7UBAbK8j3JMKOfKNaBjgEG4Uggs5dhrAQ5h"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fcc97d7b163b1d';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\/3409781652?__cf_chl_rt_tk=apj1a64OALjoD8rSKRvSnGi9Sz8.7QVVR4IJH5BaHqw-1739197721-1.0.1.1-p4upIDRm5SnaKlzGtXpwTPesMqW3PeDPqvD9YyLkRS4" + 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