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-2954701368-gov.caltech-edu.pp.ua/post/414990900171

  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-2954701368-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fee47b9cba820c',cH: 'bB9mdclpq7UpYeKiy4XmRXkiP6fNN4U1rJFHWZa.Ggg-1739219798-1.2.1.1-9Idf62Kv6qbyXjMIYgJf4JiwrkpSENFez6Vqxr0nk.RmY2ir4tTR2EnYB7iGfSlH',cUPMDTk: "\/post\/414990900171?__cf_chl_tk=M23JHomVAGvxxn75e.7RuAfkdbV_QzmSMMyx5qSZhBg-1739219798-1.0.1.1-ajFa4pcgrtmT.GIOlyvtTiT71EkirVign2F3cqUYEzE",cFPWv: 'g',cITimeS: '1739219798',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/414990900171?__cf_chl_f_tk=M23JHomVAGvxxn75e.7RuAfkdbV_QzmSMMyx5qSZhBg-1739219798-1.0.1.1-ajFa4pcgrtmT.GIOlyvtTiT71EkirVign2F3cqUYEzE",md: "QNiFcO5AYBeazDY63IH49B9CIo3o34uFHOO8bk0JCJ4-1739219798-1.2.1.1-gBfwiRKNw_Xmea3kyFtJWmmY4NKDBpKDS0BONujT2SP1OoiQUDqD43nvg68RvBAOThmlybDj8mt7zdsDfGe84xONjARJrz1TeUroIrRJ.6bi1gkn9XexUJb9tFEb1HHluLCFYAy_gAUiTiSi.KUnPsHR5vBukqYT0zrnO5fGfSZpq35JzVFyQzgXvJYUv7M0zsaVu_79IGASqY5aPPdOjOLDwhLo9_kMxgPxIwiYCk5F1SFGCC1u0kX3NqBI8HKVNzP_3ITLnaTiMXIMN5bJ85QPx800_Z7rFNYb7MjSkMS1ZNFifjJd5hIL9VjDrk6VC23CiP0R4aGMJzlyWNAnQOoEFnr9gcP7Jvahj0ICyJWa0Fs020IH8GAwtOFXEzQuiwKSCm9b4HVS6d.zsf7C8W7Ll2zMnkas8CSZJxOxym6uZ.l8uz1cM78kGZrq3ES2H3F0_WxZ_oCtrPNE6P9DyudqIJITaNbwkeAcNAFCW2q09DuENt2EYQSc80IESefvN3PVF6Fr.hIpiEoVZ5WdIC9n.N2gcxCTRKGGfsNjJyLwUkzM6Tjo85gE5cbuNUGvE8kC2pGiMRg2WYNjwCp6WvmePFLn5895jBZaPBXUg1wqbgCephq7EG5t0YlFKS_mTmmFQZOqYb4AKCKewvCtgCUKcpt9nYeo1NtfdJMFlLbhiwvjTY9wpBXIG5LxnftXGpxDc5y1ZEMECaoa9LbC5r569BSuu.gXXMBKjF396NUrkTJr.ttLcwKwVJ0aZ0nva_7T4XRdO2yHAxIAfmbad6jlSdZpaJ42ZSG6nERdhGOhK0xJzhoZmPIv..8BmzuzxnSDeNHLkGRZnZn2puFwYnncKZ4O3cWxSuLHiG.3b9mAIm2rYd1zCSrKVF_bQzn1WCi.oHeInqaAMmVmhPl5J0R_vHF.4AsKdFndOYFEqsMGsSKbOyfUQPnvA9BbBABBWvKIBpg0YsBidDCAQO9pUUZGuc8pzVfh1rolWMAG0kmbXHxXTzr28ViCpOdM5jLLxwzcWSwS6X9kDEpTDewx7E6mbtuzciXlVSCJRmxQk7aZUxjgYb_G9fRj3MiKM95GTbcjdNoQhuM9KxSO23g6e54koQOt0z1QaErk3WGu7JVTT_raBprVkMRo1jTyQNEUHPrOsngJAnPILEOb0in1owMN0Fp3yJEkJwkHGf9ghoZw8rH2EQDoBndAweKipTWn0Lmk5LDQDB4vDZA18uaogtUP4lioDfq0HMFjBGkwRJMr_Qvo0i2Fgsuez876fT5QmfG11Zo.UpSeZU0NJrAgyrCouN_O8RB4gGpOc4UbYSmb2cnrmwd5s9wVmYOIBN.w1eFEZrRq5lRxZ8LrK0qxJaUcgL3QJDU33gvaAMNdVhqP2n3f9f8nGdLvHZjoI.9c0UiRS9cBrZsTHK4VMgQ5L9BTH7Rlf3wv4YXUlaDAkb8kV.mYeb9uUlLfk1VqtYKh5hy9zxa5txIQMYRUfqiHN63aWIrazYI98CQj.EL14qPA8NNdJnl2ooLCvZu_O4b2Qp.V4ZfXofl500Dc3ZIGiawIcaJu45UM0AMtxJlU0Cz2HyEsbW2OSzRuvaaqEogi31E2UekAYn59ZDmPMV8dRGEseX4YjJPsbLLMP1VeN3vLELx_mziGEl4OOR_Vn44as6S1Cv1i_uJrwTC8OAzlEF6BCnfsVyJVxCOywuWudkmEdUhsAEs6pY0BzlgdyKZGSvdoULgYuZBZzEHbVcHqxzEC3M39KPfzCM4E9KXrg6RbnkJDmup2LelK.QySzwWB0vSAqrAFuV6Xl9Pgya4j4T7lUUIHLYLAlqx58d5jSVP6JQzVeZhVZN.fvXQ_xMJPKzEw7Wi5nSRQt5Dwoo7DQkLG2u5txBcHAA2xXARl14XnZwQpmQZ113PBzK.0XAANE8JrbOzJcx0wACniH2VQsRue9yfdA7kmNqyHlJYvYjGg0Yfzpual8DYy01u51f5tJI.MUm.nWKVoSHsXe5FrCx56YwbpYekl7owkg1W0xjuD76sjFH1EZi4DrQN_vuiVTU56fjpL63xe.pYfpUb5KX39Qb3JO4onyWrinCcUYLuFZuD7nqlGiNq.lNaqo5O1FUtV7zOZzqxT6GxpmYKqkJEBMDEaHDITgQXIpcRefD5xoiVLHt.pvlGO.3BLI1BHxUsI5o6H1WRA4notB9rzP9mqJTXyLz73tiOR9P71FCuApVIjubEHpCJHMBtuHW3941st7EB7znacrmAe73V2Bw",mdrd: "xD9.N61OKdCs3suD7X9uQTTkKmJwAiXixvIlM6qc7rE-1739219798-1.2.1.1-SU.HrPjQHWHNQ_RN4Whhr_msYSNKUnrgIbU6oyp95PS9QYkAGXg_ZmBLH.Znn4GPe7kyC74FumwTCDyowW7Wiz.lJwaltGR39WCZQZmk8zoiMurD35DdlP5QJgfSwzBvM2QjnhSe_iP2uX7fU47s19V3gTR_dnVGx7qYuMzVOASJFOzzb9wMYE4m37ti3atZ1aFksT939bnDUpC.JrCerYfVS3utOscfZs3P3FDL6lGYuv_F9b5AmPqoMVQS7k8_sjNf8DYmInbjvNfYC7fTfjW6HwqnrKY5vvFDGaMmK9e2.7k97g0crYdvy5MgirPkxu_tFAekixFQFjrJZdaiIROtw.ZikwW3Efu7xc49Nd.KRef.sBdv7FDpF7cCKM3vd62J8K41uaqr1pTBqC2frqxxP3pNTfat9RXKX4MIm7fsgc5BBobeLzttA23LkmCIT.kY57P3UQZKhAGUcuzFr2FDXgajHv9nwhWzPaQ_soFS._vcN5YB1VRGo0hHtUDRnnp9mmcKo5yhI2U.tJeLKHyGJBbIq8dQ_aVwK79WjD7YJEUpplx8kyPrEPqGX0oJHpBKZb1sqwltm4aSttNIgmXnrGePqwrvqTTxHy918.ApFf5uD0gJzp4zsWc6a2bBHr3ABwc62dmv_.rpFBUlbtERgWgBVmAymqPpbnocy719lGz9S3fZ1onYdtWJgt9w1ldNZuUnSmLyOcfGRMPKGbTGRaoXh.MKS1wjSxArANxs8Blo7oGPylIGDU4OiBJIKA7nzk2eWoUOao.4xNmuOruVxlTCAhixWRqD_9nblyIOhf.6toBQKht9nIJcjX9.KuT1pnZcNasLWujQfeu.b5qE4h6CtQuNu2H7GBNfQkK1n11nOQT4b7QccDm0s5IShsparPBP_hrlsyjhYxhMEoAmBn1hoNaSQc.tTFoEtc.ZQK3ZsEBLL7916HeW_zuijZhLczLzQb8Rp1N6VW.UkL.JmYrV9NJkxN.FiX1b5lBJBVcIu5P_EtYi.kI0mcIuFa5.P097Ozr_e64jszMyRxUAl4wHGWoKrWCFve4yqKMeaSluSL4LXQqB87a5rSlc_IaIloKkVODDTmbaEGDHdwX4RLYCMPPqdWiGrmcXmiUnv7qHp633ydnNXdkijNglc5VyMGreHwCwCTi46TQ8PFg.0GWN9TzLWYZ8nuVi_p950yTbAYi1sV3o3Gg.tpAS8EdbTaIVuBiVzmw3OlXYhIgKLef4wnzEJbIPsVL0GXsdmFD5GgK70fvnZt_qD09uuNY1yMPQr8kknhy9f4dyMsosn9XiLS4io0GLkJ14NCCMruDjfJmmVqZwDqT4wOd8gh1W9WhyyddXUcUBxkssPnKzJqOx_B4ril2YyDtH0uOf_DDgbQnMdzK5z_bnyeh.ewAwU2pOefo6RF65DBSZuk5LfJyhQ126oBwBA87HHsEHxZi2Dutot.2fzCwUVGLbnzQddP.TV1.xmAyOrOPC3XZlWh_Dq3PaoSKv7zbN8oHb1NVgiqQI1ezQMMy1fAqQBSjVX_BYWO_PphLES9yDoRA6q_ugP3qpFLJTUXkB..VWOtN4BWoMPkNulH1i6UxE91d1P8hz6r5HGwB_Zajcjn_6juh64wG9GAcP9v1hdpyktgBOVc5zWKgdWcq8Ua9btH6KAad3q_K8viWqlls.iNwkJgouKfC1dG9IUBPTADBK00Czz.6ZUVqh6usXD2cXt6LlP1oHvUlixKCVhKAZPIFe4hoMly_.vuBqTSJvjJQ3Lg3TOfbVs_S.VUsdtiykWiqftOHuqqv8gBw.eDRKty328ren0Wxw8RuzvA003cngtp15vZdQh4mwybnuTbidAQgzXMLgvFD3y_.kqZTHbQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fee47b9cba820c';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\/414990900171?__cf_chl_rt_tk=M23JHomVAGvxxn75e.7RuAfkdbV_QzmSMMyx5qSZhBg-1739219798-1.0.1.1-ajFa4pcgrtmT.GIOlyvtTiT71EkirVign2F3cqUYEzE" + 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