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-3497502816-gov.caltech-edu.pp.ua/post/3497502816

  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-3497502816-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe061e5fa82d0b',cH: 'pHsIFSZDX18.8ukL01TM8130FnE6FMPHzxz5gStl7rg-1739210690-1.2.1.1-tx91UolazgglbkJR4Ww978ly1LRa90chTO7Ur6a75KnFScSeRWXX0uWh5R8Mya_3',cUPMDTk: "\/post\/3497502816?__cf_chl_tk=NpB.AdDo2w7Og_W2hdPIelp07VO6d4JGBIRME6ZHZ.8-1739210690-1.0.1.1-Mgz.5X2cjJgDxIQyowzZFvIGRSXRXuTdbJT3lj7MklQ",cFPWv: 'g',cITimeS: '1739210690',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/3497502816?__cf_chl_f_tk=NpB.AdDo2w7Og_W2hdPIelp07VO6d4JGBIRME6ZHZ.8-1739210690-1.0.1.1-Mgz.5X2cjJgDxIQyowzZFvIGRSXRXuTdbJT3lj7MklQ",md: "mlMH5Q_YOi720i3W4XipHTMbfx3Bbe8DjZ.lT4l9nNI-1739210690-1.2.1.1-t3LHBDv.pSeR.BNOY.Si5srXk8f1SVANpUPtYI7Cw4nTOxnNHV9miYO8imxAW7nCnQKP_qzTJ5oxhreXeqzSqFgQsnRqj47o4JL50ROd9cNOjfW7utlIWeYQixw.JHIghDfNiBqz_P2wvC3q34lyoE6dyeH51tvTyEWIE.XPbURvrejyyjKeWU_Rdmqp_BqzauZHj_LHwQthZQX_zx..zNqZFwU8wx3vIIMJU0D_n5Sjpat.ln90.D2MwmCcoGH1J4Af8TUTb99fRbU6O67n8yZsRZeyhg8x1uODrlY_krArat59r_c4b0LNIi6VDpZvxkP9mxjAHUHTlwItI3Cy7IfDSc3R3t.wT1ziuUSOzEvGST5U1LP62vx1taLJHaRUR7xU0P33e.yKYAcLh2sZdVV7iWXyLp98Z8dcBTnIJ_AC9mYSK2QS9q54kd_yb6cjUUYVl2Ixv0qedKh7JP2U9o_0ir9PdoKsfzPPDsbNQiyyPw2mNDGhB1ho1FZc2DphYWuiVIqZSp_tSPv5qVVb8mQr3Fi2o3b8YPZeo4ok.8d88oO6dsbIVlI6PiRm_Kq6UjhG7n4hCjY0_AhPqlIagiq_UB1jLun9.gZpVsu8dqBL4K0l7h0i1sq1FBvTd.bBPdbUFYhbaShy352DsnnhcEb5o22qwlKXy9Nmat4iJzG1qvyYMinBIYbqOSA.5Te9oMn.CO7VrNp9NZf3wCNjFQoGMpXLDAmtnEVR0.h2F7kBPYQ7rdzGvYMD7Ljbvc4CoxFM5W7OUJEoqLJGwF9.FiIS6Za.FTdTkc9KWWWulN4FuASsBPdzvRdNG_rmvOKQE_w69Jzjuz0zEds.w80RelSoEBsncTj6n7qNlJK5odPFcn1jwtQIyG9YDKMhMKSMpINXuWT9OZgo8LPQ5rxWA1laQhynFiEtSAWGsukK9zaxYhlsp.P61uBQeOEGzHZEPIWCIxwpyPy5iFSEDXhat7yBco8CDZuIuolDCqQp1grnEAtMnMXUjx1cFEAChZaFIA6mnkK9Vor.xV.HZaYqqywtV9ifZTEpu36TUdUI1Ky3BvWccqWSsKNAPNbXjChjWaVdAYYZbV8cRR0.sDODBbhnXujcvIxEgIHMPMynLDN5xpB0z2In4Xu9ux5Rdx6DyEZ756dG.g2G9wmWNIyh1r_o0lDdschUhRCWpZ64WFq7WMdnUTDP1vfESIHbCZfO68XapkBJUtbl4kt9wRvRh18fI8UxHDle4nGyrCbwiRjrdUdmCOlv5A57gSDYHXvXe8xehhdLxwq3DtVeR0RsngGJVoHAjXC4I3H0yR9aeHNnI9s0g_LTotS_b62cAMJlqOmcrDMSYYHlWVR7.3517ZJkEg_7KGPF5j4.q5pXZbZ80RLV4LDHK1y9U8NDcqJsetYcleP_F.dSMpDbp4YT9cNP9y8isCrDFbGWBKtpBk.LjujoMXXL3VG9cbh96zep2MbQo5VYMgwjoZ2vGreDUFL2KDDqOCqnzpdovU4hyzfx3MhgTJ5_U1b9xAxAukzw2LIZRTsgWqcb91h81joYlzrA3WKwB4XGnkpDz.hLwLsYsOONmB4wCjMQ5LHbGcDjl3URzbkB.k_24u8HV2BK9uTjzLqiZ8PAGIVD5uPWCjS0mgFnFqR3bH1fvhrkpmWmonYOJve1YolyLNH_6.b56D8mnT_Eiy.FI7kRxAAuWY7dlmYi66bP4o2PlPWkf7hn0cBK3fvUO0NEuTnwNuGLl4SjNkUH3nq.61FDeN3wJpFOU_sEqTVoCnEh0fEi1jSWBXFGissRPV5XBiQWtPM0nFlPK92GBtHtv7EJIPmKYQBgPuUHmRM6d2dnwWYqLutccvfAlLTa8ElF46MpdhjxFwnRO_8Z.VsPI5WxpdOUQpA2N84choj41nM_oh3Fu1aHYExn0K7d_6uuuz5z4.2vUoVc144MDk2usZxhje5BGzNZPj3OZ2Tch9w8nb1OrkCpGmTqCl4zdHxQfheKCH6HwwMHGbkEHvs7Ggat7BRDWF2PN5l.abbRAcgOpBsgq_iL3E3YT9Za.EiG_RJXSn3P3UMQ8ck2_ZCa5656ButtFHOUN9ItaVAqCupiagzNX6piH2aZicgsL9GL.8QerN1C.O2GfuKNU1TXXpByi8L5qqzItGDNmnY5AFr7JM7KlcnWq4JDADWDCj1KXw4PwYopJ.tilOc1iSlc9paMQkXEjk3C_ChhR1nDC4pPgFCyykkMEQUX0_0W8RdiV_7c3fOVuQ",mdrd: "tBSFQawA5zfMw6_peelE3.Ve1CNzqR9Sb_eRNG92oRQ-1739210690-1.2.1.1-gmf73epw0n3ZOWPd4BHwG4ZWCHdWtVJG5M8ISIqB4PWp3EoXfrrcS6TYR8Y0OLeMuGC6y2KMcBU06JPJuyGLGMr8Hh9EkWWRD2Z2LuqQKRetbZs8.lVOw1LVr1nu6dJElbfuSaJCMhsfOLHRfITwQpFLn9WGL56ttfZKJc9hTPOvYE44tamQT5PvvoEC_a0vUpeISiiqiya.4epTGoRe1YEqD2RrZH367fWdO55jRLqW0mG1YzYbZ0N9F703WBzihf3UjhbWCgxLvlLbKABC53oUJwadO3k3Iglxo1suXMqjpoEK0amEKsmDVJ_xRSuurtmckef9N7pXpPuEi3ARTYWrYF_s8NIP4dgLVEi3gEd8TMFBu3Gr8qVCWzKsh8sWuP7sVld9h5aeeZP5CA2h4jf83wJ.gt2X.P8ZKy9r8QdQkZKlhNQj7iKQ.P9pmXfyQTGkHUnWXEXG13SkRUu8VKAErzk8mF.0QOhSLprqINEOeBXWsHaw67ixfUtPVuaPUf85YQbRHGXM2Rjlkn3jJNjmabHGSYsDhm04Lk8_8J6Jd7AlBHAb_Vapr_KfdwKIR59oPqnm1ss4icEWVK79BU.0fekJXcu.kW658odzYdUc1GRS3qtl1lZiCWc1ckswtz_x3NMloyivInSM8WUIl8BVUQ2uRNvhXbefWsGErPSqcjc49zZEgISNGGPbFiNe6jBhBWojVq3X9MhEp4XNw3mRhGu8UU42I2nfKLzupyoFrqjcBZFrCgUy3JJuom0JtJ5msfHovfKVpiUPw8MsBDY6q9p38zWYnwwWRsnamGVTGQq2V6hg6_U81JLDQwazpJUkl3rCwgRLxyk8w8i5GLYD5Qx9kM3iOb5qtR9X42BKvGpYSewFLxZ7xI4bx3_7HHUoPMnFpudguBr0tx3r12MD8s2vw2gDoJp9hrxBxHmGNAQQ2MceedYNga_PSAjTh32gjEaXoCS3CFGdysIu2cJOyKUgic8.mYq_zOSSHKqGZG0Yse0HQXao20C79e8nHRohKHZbxr6huy3Y4F1ALPXSj_E1EB6jy3PeE6ipqX2nVoWxxRvKJ9l023RWQc6EQqqaXRQpJrPCxxllaJo4B.JEd8wu4s_eeo_ZqY3f70ab.xSPjzxcJZ7Ea7liZIfjTCrsIyDOxPQHZiq6fXGDFc8Lch.xzm5v8sX.CimZ1zKFf0S9go4DC8OPQgl_10ZMKZtaUYCZCB9I5tOJ_r_Js0ojRA8D0IeOMx1R1ujuDlbjKU7GBTsIg6v88waNI3AUzW22K.tHu92GKRf_p5ncFkXW5_6dPYYJR_GJbk5WiRWBfn.RPgGqdiknsZGu4FFaqCPWWKn5.MnjKet.WTLK549RSjMY1uB0h30UGBwOh5C.G7wCjEztz.yE0Qy6cssSi4gXD1m344kkNaXYO66Olyv.3UZNx.XNivvEPMCk4NaiB0rCpVauhLjuvgdFa7tviR1VCoBv3JAXC6hL.Gsy2poECDpzlzXRhFXOsDErHJXq5LyFRlT1lWZ_4S7YSbWVDUJkCt7exl_akyMe7lOdJvCbGumka9ISjpXPVGhMsiOXKpZ1awspwB6vJ5qpiq7PKGHw83dklXVxSLiCSKVbP9WfSEGbXc5ir1vF.9h70_fg0YkaQrc8_DvhLZ5gFOl8dJYl79vlZp7JjxP6ErHKBUeAbYc2o9g5VKxt9HLKhROu3NQ8X.XK2fN.Csu_Vwv4JOT_fVQyf_lEnhnjsk5kZYN98.a.q6TkigSzuWXrq.Amtxv2ePWRhpGiKkkcaFtS8qzj.qRgKRfIFlOBT9bDf1BqU49y7jjFe2YjofnadnVCluZLFTaDeO_T9B15du8O"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe061e5fa82d0b';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\/3497502816?__cf_chl_rt_tk=NpB.AdDo2w7Og_W2hdPIelp07VO6d4JGBIRME6ZHZ.8-1739210690-1.0.1.1-Mgz.5X2cjJgDxIQyowzZFvIGRSXRXuTdbJT3lj7MklQ" + 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