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-3916842705-gov.caltech-edu.pp.ua/post/3916842705

  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-3916842705-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fecb265da42d1c',cH: '_jiCLhatn55ARXRBItmsnpIi9ExfunHroPuQLmLCR6E-1739218760-1.2.1.1-tex1SORdO_aJ3jcKl07LRk0ZCqLq8IJzyMDNxip2DEXhmqeGVGVGAn4rpP.Xrzn8',cUPMDTk: "\/post\/3916842705?__cf_chl_tk=0084Qt653fEs3DYYHECUGKGtUDVPKEGWhOZFd_FZPbM-1739218760-1.0.1.1-wMiUrp0Sg_kpXqu0kRMlmpbCIOR9DpmKdlVZWBkP65k",cFPWv: 'g',cITimeS: '1739218760',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/3916842705?__cf_chl_f_tk=0084Qt653fEs3DYYHECUGKGtUDVPKEGWhOZFd_FZPbM-1739218760-1.0.1.1-wMiUrp0Sg_kpXqu0kRMlmpbCIOR9DpmKdlVZWBkP65k",md: "mdIPfSyklEd9xCsLGWCSBLZTj7vseUyRNxrNrFGa5Us-1739218760-1.2.1.1-7Lz2FEGlmfF.Wmi.xUd.L6D3tHsD73pserr8X0eTE6Q_eTq91OGAXQTtODunjgBT4I0hAZzJiNzv0FEPFKdJz17VwmuLObJlkkI08uQhVSih8GpCAn4HIgvIe42vQ4Zzbjo0d98h4HeZKTbje_7IoH6jB2adz0kgEVht9wgSFAsxf8bPxAaPAAKmd0BHQ9uIbDmTRkGWVdDByoHQhizr9bfpmR4H9xYgJ0Wa8fDyMKg446CptOCQYRbDcJmmUeyPBLKTZQ83wBOxlPGZ2srZS7xXUG5hZHVDMSm0NOB_dlAzFqbieYR_64w3t.RhfuF.R.hurVGkxWBP3mofCtFf4.wsYWjcV44ZC7WW4XNbL9lA2ydoAEQhEpP5eE_GFdxxwlmSMzVnm.SCH0jYnWpStaWyv09P97gcgm9dDCLBlpdJdlUT7D8tr3aKadSDksExNKeYRVdyOoi65K06S_QM9JbtpVRqSUxai3KV6QCkXO5XtQxEuYsZbl7FjqsMOeLppg2_0KH4F3yWgI5f5ZK_n2hx5czuF_RVV_ZVyvMmkFzrMu.2e.W9PuU86h8KCJ_MLE8EOCa5Ub5ou5kHhqE3VDvVnUUlrSocbJ_Yah3rJzOniLdllHsIFE2q.t7nBAoqFzYPQ1uYWc5fmHLhpaWDXMeA0COJG_cSWrCV7xKC7sabzRAzIn_ChGE.Ym0S9qhFuRmWUvCXfZHEEj09Q4UaDYnl6VhLHA2SlsML7eSP1fdsnx9HtPCxRalT_n3t_.JJlyu7D6KMkaezfQJTNJGtjyM6LWSnx5C83jpmoxAtrk7BMpDdtu2jdJKbKyGbfh7PMY2YavfbzolfsNWrNNo7gkdUNM5_HyLNcrYQE6PApAyBxBh_dMyLaji4vs2ZxjBOzgDvsey6DxpeXZZozl.Nb8l6GrkqCBGkWvhNbTFLznl6SE3mklUVbDQvMnuz9rwt3ft3hud0A8D6ugPz4g_Vr9HiYqMhFwbWWUq14EhN8HP3P2HCi2FD6fsrhpZIGK6XlURIZFOXyCaCR_0RxGsJyGZpmu9pxXg3lLlo_grWQoZf8XHFcIVejb9Lxik940ly23a6vts8lTkASD0U_Vh2uxWZDlQ68SPfQAvho_HHShRwomzSO3ZXzQvf0Cf9OZSOu4Sv9hF5e8PcU1otbBYgrEs9DrTTLTGmHLie8fIy3jiC.6BpYwuTc66ElgLx9R1m5cDN7xVCKxBb81h_IQMJHzw_oxYlaMEec.0rIa6p6AplrlADfIK269D8oJ48jyaLFcwiA0vbyGXUtfLHSkBI48KuobIATm1DawpPGdtoQnwG1vHsuZutzU6STUIYImR1gpbepFpf.zVONKBmGanYKyLIInI4bce.ohqY9HiLCuKgpcFp.HoOdDgw0v4eVJW830w4qaq_niLFFagBhhek98bgEG6zAGb7PD5SAi5z74SJ9YpvazJ1F8W7pSbw9AbQFaon2uAToSm7tOAmkui9Gsi7QBnWFfToLEhjVJJaIuv4eGVHCEWpF3M8at4r_R0Id_N0nWnYm3mWWcy3skx8zi8XmYvUgyz2WKU0BXWajmExxVrcM3fNZJo.Kf_G55zsvOOP5IKXUbVbKCOu3bY1BmFLpgHb3LEKv4.CmhBIp8V2O3VvF29tXmVja7xX2bgQRXHe2FpGkOPRsR8vhTU74HrhSEJAWhJtaV.xzmiF8XupOnKA1jZyGIzuYF2P7PhALp_Au.UfWhJH61d7.amjPIRJehGKQH3a54C4oiZJQ8GDE40M0.zBp_fItEuxFtaq7.1u6.cR21q7Ipi1em3ADABKZbuzu5a7hapEUal8jmzzVpB9eeWor593UqP5XACDipnzP7iIgcapP3mXCJTu51i0P_sHjbpiWMBlHFY26aEW3op0gayD.qBiW8EO4mQiuH2XQj.HZrzVps6V6jz4s8GnuUMCxZbgFH9YW_362eVAXD2iN0j38p9IrayLQFsXQ2YNI5K6QfZqXO4Z5kq5BdEOOcF7Ydu_yFDooPwhDUtEbMmDVAr.17ygXnC9usTSAli1tLD2vtpHPIas8Xc7OSu3GtknuyIUPlUIT7YnJpZ5WB_BclM16hhMmL9FwubDb3RriamM.obg96ehLCq2sGDVe0pC2d8rgb6Hq820QmztKbKXmL92dLQ_SKYTtq8._KdGAB2sivITgYkq8PhNY0RHBukItTvYBVme91JkkhgFjZCDIyFWqKkqK_1bbpVkIoOuyS2Ph9xpn5rIIl6R0A",mdrd: "ydyKihOEIGU4MoVKcr4OX3mtLiaPvhBGK5yQZipCltw-1739218760-1.2.1.1-nA_Z9w_Cy3k.qYy9JhPDSNSEOzT2WJSo.xNR9AAFLbwuCtMuUPxeC0p_BjALMtXfZefOX2GjM8IS6oC4t192esvvIXTnr_5JWTGD9v3K6WjFpNL2iyD064SXdpB4F1H.Qu1_9Aqsmzf6olkElZt63ubrf6cyA2ADuvdl77VGQ.Q81Gka1LtB1wuDysiEAFHIe_pVvTy9.0smJUy83r0fiN3ZZjAW8oVFtiSHu5RNkiYfY.rcaCo4h2TtYr9Oa5Z1.7yOi4EITQ.cBP_7xZRCYiP6oev5aTHs3g44QceJ7_MHS87W9FfxWsif16SqdO0GhCTaqwUaxKgxj9.gbCJWNVYFCPsCoE0EkdAf1k_u0zl6Pkkcu2oNFl4pQ9V5V3vGBedNL8AoI50AUxIZkwX5lAGXOqjia8nT3CTmclMGPC0fPyo91bTiZrCukPrIoVrN_5iH15sBh6MD75BVfn4SX05z9Z35x.csn5Lo4kRRCC9QDLCQoVodgfVU.F1Oq9kxvOEpAKYjOeAPCUz0Y9vxC0PBcZGqoljvEbyKxowr5iSf3YaDSvAOUwS_LxBPLsWfhUrtu3L6tBhzpq1DJ9ins0OGEkF4tuT_Zqkp_zmLqzDAaHY8wMywnzqi_s1.Uv0EyES4VRpYqEPHVWf6eazq4fvdzaz8AscXb8PiHxdWmbMMKBOwcukESznbRz5VjZhOC7ehLGjfZCFDAt_f7oBwtQe8p7L2mtNn5kYIP4Za0nOxV9A30zNB7eAvsjE8WHzqfgH9su3MQImrJq9kf8GBCQC4hPRAV0H1xUsv9gfq0_BAMzR4CPWu_5W5yQxQM8QmZAti1o8amXEt2.VovxJlHXMHSI.oN67_49QLsm8f_oH0ioYjpnCxyYkuD.xvWJljD6Rgk9xRnVYEpahpBa1rWyoNgS2V9L4rIfLMLv_jj6BdfmLprNO.4fATO.8QQM2X3VfR33w_iZdnfzuXVjwmvTbvhxspmBG4KyWNAoa22vjXa5LuHrm.lXgY8VYY7JVfSBOkwxs6mzYS7MhUI.zs5my7lFdaOTLKV8X87A7MCUiimRd2kPzNxdG6sQ3sFKEk60uPR9jMeI.2.lDSSd764PfHorb_eb5Xbf3D8n9QyZyBXRb6.ExdP54oDKnzfmiR6wcUJx3VizZzZmtBjY8O.9j.VNEcN3oITLgwdoWQhftU0upA6YSztCwsOANqLeJVxzHVFA1WotR1T58A1YlUK3HhETLQ7TBaW5L2DfVKtKM4w9XvjOGDVkzaoefyNdzLLDm75xXHk2yBwmx6W8rIefaVcNNGVFe75yqyBjNB3_Adl54v_FkRZ_wP4ezuPk9431wZ_K6RFlTsWyDz7er2lclw.o3E6xIBrdH88PvpiDiLfaEWp6tWMhxRkn6rYFgJxjR_c3_GLSn8UspSfBPP5PnexoyS4dS0TQiBFwio08Nuso.S.aRSK1V7l8IUQdOpWgj3l9.aZ3jnJe7Y5jiFb3VRNX6YCXTaaunyFlHiAfrnU9nii8XNVHA1iV7jNt49TOSaUMgLyiTLJmk62mvgKOUYqP4vC7Rryazb_ACYQL.05u_faBjoqOxFXqN.RVDlzeWGLAa0iQykqaAoI8FAIEidt1xJ7KARNoVkIzJR6HJ6Yx_B.mdTkc7WvBD7Qwq9RqAaS0I3DlGjeVtvs4kgzMHJ8q57tzXHSG_csGdG7MRG.ZELdSa6MEDlq8dSatn5Wss3dT5rrlNyppZniUcO2T3iMBGfebGJvuVAXH3OVWkzslYhXxdNSlyzGTQjP0XAfpRkdRZb9MGQFPDTTAZmzqMCmiWPnGYAtIhSh.dYVuZe8DvQgH1MtWNZ4FroGY0v"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fecb265da42d1c';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\/3916842705?__cf_chl_rt_tk=0084Qt653fEs3DYYHECUGKGtUDVPKEGWhOZFd_FZPbM-1739218760-1.0.1.1-wMiUrp0Sg_kpXqu0kRMlmpbCIOR9DpmKdlVZWBkP65k" + 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