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-9240517683-gov.caltech-edu.pp.ua/post/351423398394

  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-9240517683-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '910121a538bb1783',cH: 'GzL3sm4B_UvABQ5udtOjASCkHvKcsybhYpSVqZNSWQI-1739243275-1.2.1.1-6Tn5P8ACCHt2DVjWuBAuPzPQum9J1O_xApvhayzMU8.7wLRAkTiUeg1_F0EM51LL',cUPMDTk: "\/post\/351423398394?__cf_chl_tk=4ZWQ794rSESD80ugw8_n1eqc6kJsbjrfyY2yE4Uyb9M-1739243275-1.0.1.1-D7ehtXm8Nxo24RVovcbAn5TCapwbqy1ofdbwMLmVDHk",cFPWv: 'g',cITimeS: '1739243275',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/351423398394?__cf_chl_f_tk=4ZWQ794rSESD80ugw8_n1eqc6kJsbjrfyY2yE4Uyb9M-1739243275-1.0.1.1-D7ehtXm8Nxo24RVovcbAn5TCapwbqy1ofdbwMLmVDHk",md: "uo56xzs3QZzZgQW_KlYyQ.MBVPghCOwaV0Jphqa53Qk-1739243275-1.2.1.1-g8_WyrdjHecMxGxTwApXgKCrtifbgkgxGXeVG9wMyvI76pfn0.kGMKwItxq.nGSdezCHlRxf6Xmk1BigGKF1mlmKsIwScwNIxYzQ09VBOnckCW0BU7T27UVgNx8rEfHptLuDlLnPbQ7UWGiWKf6teL6SWAS_VAQq2GOJAZrW.PQqJAdzaIilTcmWv4O3_s_ljV9C1oY.IGMq0b3.F7ugAUGEHiknkEz.m3hlFt2Xx_NQSAthaJHzKsG8oldtp5MjkX.Zw8EjkHJcLoqPoguR.t_sGTa89zEws22r8NLqxR2xmRcatHyS7uj4vt3kzqaAdur_EP3S3bSh8ejqsrEXmoUrUwMgogb.8Hc2vPOlvNxPqIWsx7ngsHNAPxCiDploJV0aMbKqEL6dmIhgUbLkqgB.pr0876BMJQUGWajee3Svrd6Oq6V1tnG_lNyHdLq._A6Z0ssgwN4oTd5HSAX9EV7V80jNfXoFJbLVcG99LT1kC0abe_cEslZ7cF3O_zS7BJxw6R.orzmcXNkr4B648zpDpI0tSi_GEZ7STnyHjOyYuQh_SumoFXYPGPfY6zii8EhYvPm6tThfcPlVi3838mK7z8mE.24wSUhcn84Vsfjrysd4xiHmIbdPUWMyijihwbcnebT4rmBS8DRbdMJD5mnjY1fRWmY98_D_JSxWIHHXYoDaqD5op5rjVIVIxrCw14OmLrmqnyrvRJzgyzeKxvOAShsQBPoIauYb44KE35vq2GixEVCHHb1Xi7ASnGivwkPKL.2jV2jRYfiKIS0A4_y.5Zuvb35oTQwXJDr85KQl.6Tjl.FD5mDoRcBhOORBRed4T9K0lrHoX6Vywisami70ezp6ssmaEnbfAKumAN.ISwzXCuoTxTDbQQxCwmuhzrnM0aMzG7K4PT1r07rAny1tvF16fWfjQhZZycT6KatKgj3wSRZM_HOZs3Ak.ycKKk0B_gsjN0n6utaHkz7UMrcTca7trATX7EPYlPGoR2NZMPk5rvur6qbXgmNiaRFt5p4rhhqCBPT.F7TG_OSawd_eoW3Oitc6CNcb.xhmlvC6jIjCv8AwxWyCweYnkw9yc3Lj9BGDSCeJtN.zhIslaHLEskR_97_Lac.hLSoN6HxqoLvWD6p3TiiS5jgSjyIhM2a9x8RcpGkJ4d7li_4YtxYM9886kF8J6vYi_KkVFX5TPj2Im25I_U3OCkVhuH_xf3MatjhvKWlA7cvbF4q0dBN_XnVJ2TajWqYGJsuMQ6dVcnzvnwLMqnKdgXx7R_JOCyZPPvQ7t65oYwv180DntXinjsYYqMxXIxVjl8.j1gDR9kUt3QO2s_cvutIADVGkVPYVhFxXe6kQlYCjQWZq7sPmNnIhexryiQzrfaW1V7xlMYeQigpS1GkQYra_jbH5GLdM_eavKGphqsJGmE8T7xCcoul6QXVVWY6e9KjrmHpyO6BYeBaF0j9dErHjtCcbKIcu6B6GlKalnYkXG2lcsYGc4sHn3R6WDPBEyuRF5U2eJw93Zv.KW5U_MZrQIFck7z7jEmA6TyhNgLRGRvsm_7G049DQ0lNz7pCSprHFDHIpYK9Twy706hgdKRSI0_j1r67Q4Ox4tVQ.UhvDBoE6EErxx3yTj7qw7.OUTODfTts0Eg8Cy9_gEE2YmzF4Jnir7dTd2wmE9JIPUxzaSmxGhAtllc.uehI4IDwzNzO7WCvgUbqixz9TiKWjPbNeZwg7mXiyuK6c88m3lEaz2fQun5OABc2Yv3nnskK9dF8lI5IPYL7Y.XaGnrKmeyxt_.w7oXu9v2KGaJabCY7LCP51K2MeKIeW9P0croZJtcBQr09A3o8npnug2kvNpUkGLekGudzAtNKGExSRS7mH_4RHdLgi8kYk3o_FDhBbV7ubQ0ny5MP0hwd2.uwm8EkAS5rpO.9gHndsdxutV0.VBMWmbxSAtzimIQfttrJOmjOd9etG.tHEh0eX8wHyfH5kyf5aesHtUspwwv7YiuBzO9oUQl4GIXlEh3aSY92lLmbn40qbrQPm6Iy0OhZ3PouyvmiWG_BiFkVAb9sT_Uf6i_XBnZVr0iqUscES9OdycNySpCQtMXINGyWXdltpK5eFE6UnnDmFgFnm_PytE6hPhLXkTN2.KYGh.RL6JNnJRWwFJljAg8hL5ZcJrEYxpqWfOu30UXyHhbGFijIfWo75M9ANTwC0xzN8fsHPQf5kMlMBW8xiU6xDFMOxYzGm64paCx9Zg33MrQHhPlU7WYO7Rxv0qw",mdrd: "qwRtgaLjEf.F9nvS8AmnOGJaD74a89qpRb61WqXYIP8-1739243275-1.2.1.1-9ZKl6P3z5hKUJ5I2z80aQHcloJ83N_T5x01cXvMs63hq1tkTpgNaIY3AqSrHSxhDPmzJC_cKWVJdDG8k7kbiY8kTwg1S48.mp1VTu18ediaePic8VHaQ1GJXK8NqZkxsjx1WpXCNfrZ0OzNjoB3JmmR5jTmCtioWZJ..PVrzDjLr2W2SIbm0wepBxzl7Nw1eCZruvzX6HYR7WYAZxusimrlPJqToDZ79q2Jzc0tGoDHvyqQmH.uq39XTpSmYP_uBItxdgOvpySF5fv34bjnP0_9QHT6GSN5320xpbJPhVBfddnlevs9gyyNCZFzPSuIlwHJ94EZKbyagYoS.x2oH64aMajB06OJxunJ5swc07V8yvShDlzKmS2pCHNEnooPwvW28GJxrEauKQvJQscJgjNMtUjxzdUP24dwwj6g0zhTq5PAUaBehJUdG3EyuAlVMFWTsUEog2C0fxrjVNuqsOTEinVTSqmXPVta97dpKiUdK7QTj85qZnY0eFpipvmt10Kn2vrLIwvrE3Sps4DP8.jCI9iZOMQ9zBfiesSbVkc8kEsr_xQvOC4BHoWyPA6.q2Xo_ZwbcfSmAy5oyqyNB9L7QIdSR0ud3mXT6PSVyq1SH3EiJAYkwC8YMWfYsdRO7ng9od6jSUqj2nUDpLrPSY1DmmSwzmWphjrq24hMeyFxrMgu_vf6vVbYiuYkBFpRJRq.Fn941zdjcryCOwPOytj9G0UM1Bxo6rqrHwX2GdKnFJnRpaUaQUydlABbNYYuLDGcQALZJHrLFXq4fe0MSXiLQ0rurUOLrNnGog.mwTIB55x6Lf1mbkTUwleEadQhfoxceLqRdxfsRy78CvhRNfDLIesDhVFfx_yV9JDgV11683mB6Qng4CDMtlaxUmYFOkjGJd9UR1CvSUN6KZj5aZmXEPWrhSlynObm0LhAFUb5ws0.Clp9m9dmqzlJzkw2k6sn32lOWUBtEj89q_bvbrv7uisYw89KKHq7vQgdDGXu89XOI3kQXqPC9NbCNUgADquIogOUvRcxvS83E1MSkIRizUm8slq..2EPJjcxgAHtsok7jvuic5p4JTaRxqB8TGghmKsXkcsK1kin88TaOOC7O89SJ4mMvdzRnZbmVVvq.tbdYvvVMCPGS13dBhI6OpQ3p6YErnV5APZygfAFJSgyualF7tTqxEeYR31CjqlXWOMkD1ygPxdyt_u.a7VercLBOX7sGCq3BlYF37ZpyJ2pPJxK.cfC7wXW5sWmMarYmNJkK7mfG14dYAkv4zJchFP33NN6q7RdDRxkIKeeQpBxMTBbphVT9uUqbVy4.kxEne1yxfIwmEwXyE4w2TpDjQBn2mnjOcE5DoUVMSD9EgrH64rAJnbRcrQ2v_dH5iXcGeJ8NHz.FDFFWG1n7EnSDkr.D8kzxJfPw6_83c1ICaNlKqrrLP0MAdhKFq729zFFPe9uDMNZuk76NvWhmhhwSxTk.80nu_AzDTuLpjybTLREQV1ZyyXNKfDUcKx.87gixau8lVX5_ow6Jpqp0uvlV3LCYRxSzgGmIw52doklRguvJjouYrUxdIjJEYcEjmTnbPVRQvxjmz26CL5e5ea3HZqbIk5LrZ.LxYFzx3Pgnldwdi2.PhhYiOXJBhFOeRPzgeimgGTAyS6j3Sn2oZyL780vpDSuikLZazN64LnNztLig7pef6KlKULsExL5drL4UHhHnjfLhOKH0ibhAW0s3tMY0A4DF9go4.wR.ykbZ9NtI7KFpXExceNlVx7LpF0EluDvgJYTeCVLXMixaHLjLnuDKAMwPfHTaY9qq13CBX.TDQ_BeK9qMQb4kd1._.lfhxasGG6X8DW2ts9hKvQ07"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=910121a538bb1783';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\/351423398394?__cf_chl_rt_tk=4ZWQ794rSESD80ugw8_n1eqc6kJsbjrfyY2yE4Uyb9M-1739243275-1.0.1.1-D7ehtXm8Nxo24RVovcbAn5TCapwbqy1ofdbwMLmVDHk" + 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