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-9620547318-gov.caltech-edu.pp.ua/post/875246404079

  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-9620547318-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe247c5d86c998',cH: 'glIxhn98nMWw3KhZnhEbfiruZpYVb9adGrEMM33_0kg-1739211934-1.2.1.1-TbUFhr_hityZi2zjnB1j6rKrP2qE7MWGx5o65xlrD6wY3WvpB4Um2GcsR8SLw9g2',cUPMDTk: "\/post\/875246404079?__cf_chl_tk=ttBD2D0IOSrgdyQReQ4jCAmbOsJzGSxh2gAzSAIVBgo-1739211934-1.0.1.1-nizPHmx5xMVPjIkULqicJttWQuo2fl6UkDb2hkjnC2E",cFPWv: 'g',cITimeS: '1739211934',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/875246404079?__cf_chl_f_tk=ttBD2D0IOSrgdyQReQ4jCAmbOsJzGSxh2gAzSAIVBgo-1739211934-1.0.1.1-nizPHmx5xMVPjIkULqicJttWQuo2fl6UkDb2hkjnC2E",md: "gf5BFHJAFbLk1unGYbnHr_ExeVZ1Ym6YZruHFXzw6mQ-1739211934-1.2.1.1-eihBjXlkJzdNAn3wFd9lNc3fbCWZ1JN.PKvgwJO_R4_Uwm2lp6u10alc0skD4a5hZhDvjkUGl7Hd1Ob6yG2MYzmBLoA7qJkRCbcce3.yNlTODe5lt0.a6UlhvI3cMSf2zdp153cASd64kWVEwoT6qNx_zJzSJO.JoXS4Xx6KnoRJ0AO4g3OvIgZrHTDXwpw4YlmAn6aTHY7R3Hqs7GRmVzhQ3KwACR3zsJM5.eVZgn9U_6gvm_QFGDJeWMXkspFYtEo0d.HqTmAsZa..f3Ho6b_Jkw7oOMjPdO.qeKPhc_8y_EahXe5ckJ.wp0PcH_vZOTNhYC4MHaQnbIRvVnfFlp4yiCPpVTU.ABvTUaXYKr8y5KaQ9o1r.FLbf8KHVytZuNBVOK65yNJSGsqczlSYLdeXDTE5Rekmdsue_Dn053X6U7ff1Im41enEzM3CceWGZ_3nkSLZlC1UM.qlGt4j9EvotrSK.ZtnNJFqagXfexpYDgSTcwmgKCMd3pSz0AQBBDYx5bRcYdmydx7X2oDTWcCNvmTFyewGIRjF6vuwxbD8u8BWnUmq.bR9VCLyQmAcsxiYG5YsKZbQ7UO4DxygF7smGaXZEdoW4gT7oAqj5u_QMQ8trO2DKc69o3WQcMekX9LrpDI1jklX8CUcYYo5wBVa1MyWhj6_qzwj58UjfscrvJqUwHF9Bw8u2p6OBTZ.KTWPepEvpmIlTmD6ZkGtBYIdgPXUrLOOlRRwiPt4H9rS3uGRmW3evBizAhXu9rgAPZyYRCL_FBqTnVNpDtps1JOqPmp484NQDPJUrorNpaMqbM0cy8AEQ5ySBfycN18XVv8rTcabbIobnRB3oiD6d08iFhjb3blh2RhfJBlWd4aGCg.5AmPlfZCf00t2yCOcKsqM4JKzE8RZo13ML3cV6.rhxeZlrRXd1to3AT5VZiQN7LWMQqniu_oNsJ9J1s5VonA9srX1rQC53WboVFrIZyGUwdOWHFOCUP1qbaFAjgp0bj5rKMjXWRQ0IPHdYNfhwNRvhPVxBz9F2M3ZOmvF79iStHrH7N_WtCmTOumcDSvi3UN3Rbv77TAPJmmYFu7hHIOt5hosh9jh47ZypeRChfPcmPfvpstWHYHA8q4Cbdc357VUSaTZdZJB3k1YLEz0_aw9JY7oXNT.J519mOwXIdpbTWIAXBXdzup7TkhuJdhFzi.9T8hsv9FOr2yxP1F9f7U29nOlrlcIB2S5hBzKw3N31Lj1eWonDJWCo3BHavQxZy72bAW9Hd7f3txLjcWg4PoI7FR0HssITt_v2EOK.aFDmmydbnQfdmG1zJvVvToYG9UvURx5x3xlk6pZ_7qRtHNGdmRu6yOctnTdyCJwQMUMJgN9bSHX9l.HeddAngppMXDZ2Bhjm2WM3_gYuarw0dmO51yR73r3PJc7xQxq6KWL_8SrNfgr3vy1eDdcIPOketTI5F5S42Ul0zmiURG70IOJ68XKDsxkvpHykKzi7.BaaBb.vIPZWzJdaKW7jZvJq00s0M.AI01GbWJE8n2R3mchLAYRWEMbQW97gIaZdC5Zl1pUXueugbJg4wV2xcxRs24fme2JPKe245H0OGaUrk2dHHn0CWLhTyn0oFlt3QEm19h8ExazBxerKMP30Hra5luIkUnZcTqIPqaCrgYJCL03TyXI6jxvQz1G.8WTqUELUdzHJd2sKsc__MIJa2TykbMFfNqlbKOM8ihNL9jcwQIVfa4Ag9XsxfRJARwrz8qi9ApJtu.zkiKT8CUMV5vHQO2CgITcWobpyIorirMdPS60myVH796ILyt.Jj1SrQ39iEW5_ar6ewyH9.IPIqIUAmB89dIRPY.ctgDptxCoOsJF_vRXAZvvtSs3grIcbElRdBAwZZ2pPl.UH7kujXHmgP6HXev.IVHEQBVx5gCwULgMy57xxPb2APRyvwh9nvi2vFC.2ycTQRDQX_VQQAksL74GpiQv3CfzTbfP._Pv1HsD7Dslelty_tIDO0H.iUbTtvv6LkNJeoX_wulzFxjqLJAp5gYHcN43uRBssWFlzZ7jLzggKtxKiKJAAh3ekaMHVG9nU6nM1ymvBHp5DsewLNyGo_n2hVNBQhaCQPv1S1mupRiAZVRbyA6hJVDbuncpKQq45vlpG5l2zEwDXZSkyOWDnuBunPePvhw6sHeC1EfVCZMDztcTcakPIiSkD.JF4zztDfX2KqIN1t76S7rdJVxcwo8lS.F6YZznifj75rMYAisJGGQEtjDP7MTXug",mdrd: "CrBRVqSeqmXd2i5SAi2rLYH5rllJVM6Saifeti_XGlA-1739211934-1.2.1.1-_.1WCwuIYSddovAd.VIPl_CxX3EJM81_yvRqFeAJ1qB0aajJqyCXhyY8nZbGYSnP4NB1IaKiGM_jlU93V8q9RpFr5cF4AkgIXUaXWr0LKJxyrL_Dm6K7zRbyeL.YRPJ501dxokAtxVB5TWpy32da32ZHxDnUomUhqZDLfEMDCx0haVu8PWhwol6z1h0CBS.yNisUg_SuM3bQnQFMFMZR_I2SwwmTphj75_xrivq_ZjOiAXF7ABvbiV1ohhyMXxvyeFYhg1gmIQfnjvTnoyYqrbdDGyQRydZVA8kjiA2Sy8zj0cBeV58HUI0vFB1QKwTVmdRW5_kRAh.CST.Zw_jjJpkx78dBH46s02cu0wqJMv3oiaCABli.xQtFSXNAKDpK9M8I8Q_tXL4XdAMJdSd5oJEOpVM5yoqYQOv30zT9AWRTERUqtTsfBh9nMBwaE66BXa072h3OU9BnzVwNalHxrNdlpnwpyyhqHRSpue0snAeiohYxmKQwcNFnEY5cXDsixYVh0PHX1bycSLoDFsCQ44WkKP9iTrDVijJcFlX1ycZ0ld_lBBP.xpSYlfUg381BegBHCLCCJPbBm96fgdFUTsnb22JDwXIzcjarLm7m6KFGfIEvJ1kGaYf29Dz5PA2.5EzKAtAL8bwfvyQcRqlfuw52zJFsXnNsdrWOzfOl03x1j6LyIzraGVBF9pFMfudqazEu2vJDIYhaHpbTpYxR23uuMP.8i5zTyRLJ7IPEYXFat7efTfF3nPsdy20iiaZJEtE79PJPutbSUHfUeYjAqKvZYthgb_2W5sUUrtOV2x5nNd2GNzpIUJqkOM3c30vmqfNaG34Ppy.ABLqJ.0eqxjR3t8NgMdmRkXxm1fBQgggthD6sBvIiYDpDZR1zzbis.qOkjLdre5WVp4Tn.grVomxbBW9vvvDMtkbkOKYoO.2AhZHvkKgeXYQzst8LlRT1PHU1.keg3FE9gLEEcC6eDo2ZOHpAGO0TFfVsW0xIwHrWUPqLV20s18bWeBcHcc3lincTZYlK3ViKBaSWt9IFZHN0GJDux.OFyLknNwF2XBireD4._JazsnIf4m7kjnKNVqjsv0PWoIynqPasdgRU25CxhixTmLur2fJ2wDJ_QxK4Myf_GACJ.vAayocM.MAHPS_w9eBxi9AlSvsT7czxYyCDmcNXHOT_wKzBZCN6xTI5BlbO7XQCJPEuF6MYvDT9pYs1qonTNhUcx8D8qmFv5TCI8yljnWD4gKCYoydi65ZsFdoPSNAcAZEO0kzM7Q80pyWaW9iPmbgU3iYAH_XWk3ioc5usIhRnibSyNj5KHPmxQb.TLa.UCQYSLTJGnKglZlTkIGjui.s5jgKRo2Q5eHk.MxPMliAnmgJq404RSHofbGTVUWWJ1WU6B45xDVmgoqOjtoG7qX8ZGvV88aesoHH4KembODqs9lp.1w54bp306x0ps9g_5pFg1dOvnoUCbbPrsQgX.ySBiAtEVfyczXPUxwrTIqVfywXtn_CYl8RxyGAqzPYSJJVhQQ7dCZZrK3bSzVQrErU81WXdayR_njZVetJL7IbSLikwhL_5LGHpByvYU0n7lO0VG8zJIZRCb_tIcTA4Afk_GpK.K14wuz18T7mZtHYojPSZdohLgNzlXaZmZxMZNImYasFQY9NO8W5hIGjtrF8Dq5ybxEZYi4g49u4r2f3TPZNJMLFMoogPbkLTvWzgpuXY4B4cBjhIy_GfrPiPRs0nAbBywV1fVwTEAA0UkzEulAEbEwYZBNbZ9IBXE7H8vypUV3JEpu9QxTvJb8vfmmOW.xzzh5m94ZTHo4HHNuvShkh4Zm1H2A.at6Epgs7bEawaNnF3U12H"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe247c5d86c998';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\/875246404079?__cf_chl_rt_tk=ttBD2D0IOSrgdyQReQ4jCAmbOsJzGSxh2gAzSAIVBgo-1739211934-1.0.1.1-nizPHmx5xMVPjIkULqicJttWQuo2fl6UkDb2hkjnC2E" + 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