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-6134908257-gov.caltech-edu.pp.ua/post/4751296038

  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-6134908257-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9101281d694507ed',cH: 'TrhQ72jW4JZ_vRr7XtMo3PqDY72cusBJZTakwZz1dnE-1739243540-1.2.1.1-GIbGphwJOcYrlxK0X0oGhG2WX224rMBN.jIuGmvkNeqlMfQRSGuqm8CirxTaD3xv',cUPMDTk: "\/post\/4751296038?__cf_chl_tk=Dursa2eatd9t2HRE_xIvRJFgPbjSj9WH8DKkptKrzOc-1739243540-1.0.1.1-8amgiiAvSclpl4zw_GWfOSSJ5vann3DXbKvgD9mwknM",cFPWv: 'g',cITimeS: '1739243540',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/4751296038?__cf_chl_f_tk=Dursa2eatd9t2HRE_xIvRJFgPbjSj9WH8DKkptKrzOc-1739243540-1.0.1.1-8amgiiAvSclpl4zw_GWfOSSJ5vann3DXbKvgD9mwknM",md: "x0rwPOIQW.t0hg9G3RfGozaQ6MRgF1FxHSgcQLsis_c-1739243540-1.2.1.1-dk2x6X3EQ24Crics8ErsKz6xD6Vrgr1iWRKGkHEyudml6hZpwO.kX5O9q0z_M5gXeXqIXFuveOB3jYQyCV.FNyWgYwAqLf1FryaGyRYyH0QkJLoQFI3b6TwUgNJN5KeUS_Rq8vS0ERwuHepCuSv11bnUeJl1s.9DFTcyVIsbp.BjT4qzQsvzjJzC.7gX_BHXpzxOyvsRLMgOyQkbBIKXsf5bvnFdCRy1MJzgB7tfplrr3ENVxb64gA5F0d.bwMFCCDRivnheL51z7sMmeetPwq4TcYdH8omGOCszQXzIGXoEwkNgR7zolKn1rXtujCbWSAinyEVRKoupJMoPkEB78MeCR.szgByAwzt526XYD8a8_hQLHbvsOqbDJyOCKdWkBJkxLdf3DvIoaVesCplfW2x_gVR76AxRH63d3mdMVsdaDutgI5oKCli9mwxdaHmaQlg3gNJ7h8pYvjmpXMVCT9LiTRLIffFfDlPysu5gl3Oem6j.PkvgxADG4mjpKOOPOYXBdlcieVVB2EZXxPAVEOG2P3_ZLq1OY5av4LUWXS2X5yV.2AO52skSgawqkIV6vzOPwH8ZwDQD_i5WDEttPdcH8OCSIW7ehO1rkCBHcGsjhPQe6r8fK0tPuD3PColzXxKuxmYzHyFU0xLVFnuccvCy.OFIRz0p8VEuXNuPcIC9gB9gwg9xPSt4fujCWQ7ckJ8SxEQfg9Rk7rh3pzIZmaUJVaQ4NV.W8UJ26taTvXLDkuz_jU1jFznbC98NdR8NLn84prnHZcejg.hCxQWzOardk.xQI7Ml960YWt1pjWdIgW8pyPBEWJ8tXpCxyZhMA9a0GKhsFL4OshxInpeWFvX9gKV4mRPR_gn82RkdTG8btYwFEos5_WOMaTJbO7RO0mysbe0MFwzpMIesw31x89CAa4d4SmCC38WmJPtej.Dfj8shQzBggtax2TuQXmOzOSG7U9PeFbPTQRs94zFho6aXrMAF9P1MckQ1E.E.6lf6GoW4B9tgbdfOYJlWTsPddNNFmqhCBXCPgNcFZ62dqbL1K1q2kuoEeUgQPVyWjE1MqACcsfQMuxdIC.h7WDJlGL8tzWNlKF4YZ7u02fYd8aCS.8x8riA1Xa5GP85dA1nCm1wq3gqKa0HZ2nx02KNLMIJYK5JQvGAAIgTjjY7_dHGmauL9MnFXdhn30eNSXSL4NIXWp4.WerB_qT7vixxW11o02GdNh0GnpiFOaVYbbmBHva7rFXp9ArOcdmtQCd5SnWTGbKIf1.KNgLV2U1wLXvTBkG5FZ.s1TPF1856fM5vORfiBlNB_ewF5ANEtQ3mAgKWh2uFb6q5kNRV.x5lpnDzX6H6Y3ujhEitnFfIHx8A8rnDspDyPhv6aG2gyKGHQYW5TinlZvSY.NXpGXmzd0Ow_zu9vKKhTBUMJgj6pfRdVcS9G.DlOO5p0t9P_D7oc0EohK9hSEEWz_yW_iGY2kcBTtUtNyydXL7YM9Ygu90PKrRdh8ajRFOGzQM84KJZbQsJyzG1wRKD98OkY77yNxvt8X92GrP48hnGFL7xKS8UUpP8PLyK6Yl3i20MVRGWgxbNgoQem23YCo0HQ0kNlnTeAel7kVS3fON.gvwPcfi2SLxyGpbAOLgtrO1iepCGLIyBxu11V95QDV_j8D3X2Z3cwewO.XsPigiuo0UkcY68JlGwvwAaFSSQF7Comn9vR0OP6gJVcdD2tvKonIHHjCdnfJzBxMFP3j2Is3dhLZLeXYcFOX23h6NrPJTx55HDYI..at.rkPuX2pbyxsoL5jFWTHDQ20xvcnBcetXgpzyryEEc_EsfxQ3VA1w4yhjQue5vkojpCAWuaI9pmFiLkfpCZn6G2OiMCRryNL5Na68vpxaSsEzI5YjjDrV5umYXjnd4qPAgQry78i4ZUcQ4R5maugOLUt4HFL4KsywYF6NqmNkmmvwZq4XzHbuvbdkCtJiy86BYlNyje6v5ylSnUF0S9OZMfbVBuW6650SU67UN34O9AvE.LK_ehMPssptd06fL2Pbf.PNEcv84ENp.xwOvZJU02B5vmGWGIpctibKfJudYar_xQgIqnoYPEm780talC9jBlT0.Kuc_L4U8nl0hQEATOLO.KS7LXuBflY2C9tKWWgC0XIdNowwILQqNR2D33FVVpMULwgk_QTi1Qt43d2uj31gM6Kq9gObFRGZJaK2.f_00ESPyFCCOC_GrE6M12RCah32mnmdeACo4og7k9wfCPEpc2g70nyfPlmg",mdrd: "c_aWTxdoZr_aYNS44bdKWUUobPGPetOMVDe_PsHkd2k-1739243540-1.2.1.1-5i4aR6jjQcfXoCEzEq4b3cOQMUVxfDVYX3oKryWkH8LtwxZnxzlZ1u8YGGfBT5.cfGT8CNptAQYNcumHXfbG_OV2IWqXEgBzcqsWUYpXpJ5KGBMCLnuWIghA3wf6ExsggpP7UPe0h7zCg1Qw0NccAmezR4iL8ooHK2RvQr0z5UsnH5RPnmyCbUDz.2tb5SAyyOBcDORiUrPPQBF4ySHYR6LYCrHebSY7c9PkMSKjJwEwUYumwovSl__KhfHiylWKQP.PoyUFhST9SdGcq9GD4DCtKuOyKhE4l6kD8LGTUd9u15QpmlOr3LyFDPIVyXIP6.J3vfoOcZzmF4CE8YU.SeqPixjGNUoeaERy50u3i5GFh.Bv.6ApVIjQgsGARBtLGx5HtvJCud6xymMfFskQXoLJ.TYg6mMXT4WxZ_Qaj42GTQ_7DmDakWPMJfZiRw7P_CvsJHLTKJFUgsjDoVr5xWLjPF1Us9mMAT1pH1rKyj7M2unHdetEW5r2rLGsN6lT61scB.kCqtYLIbywZ51r4wqr87VW6ammc_O_9mzruLG05MweYKqKHzAFnfutCGRcQ_HkVj4B.Xv0w5XQQ23JWsJvTPo4P6ZI4nxXgLziFaO7FGMAdySsbLG1YPk7Uv2NCF5g2xCKfN_uR68E8JwFZ5S0RULfLJHjP2Pn6ByPSJgOqBDf6sIVUHzzolHWmFxMS3VBoQHkKacLh0Gv3sQ.tKlzB4UdpgQY4ynxF1Lfk_z6.SXk57ceBFMMg_XxY3S2_p6DzPQo5ZUjlFRo05tVhnfr4WwyjJ6n30et2UuPifSJjCCY4A6UQBpa2UlBaefWpMIOLRxONWiJod.i9uB.hYhD_s3JM4M3K164nzRzSzOYZ6R1HDqxSRRJgZObRR_9xi39Fg2FeL5IYKv9rKjq_1xOWUWwu6SiuWrCBE0aHhDxMwyJ8zyAeS1LYwWCBC17ZJJWymvOPMNTC9macMj.zg3HFpB_IfJXk3dFmFBobfuZjNzyiSjEjOKHdMSP9bCQGGpVKROt9LzxmIKMy05QsDNmC9xVoaq79r_jhkXpD2fVo2L9dMHtExsNald_vac38bf4x_JEgh4_1w_JuQp8z_sa.np5aLPeXABKHNu_wjeLbScKq81H7ecfLN1q3LOwavuyKlmEoOPWcyOgSXfDsz.mb5Ddw.23Wd3p36KF3HTUfWWkdHhEAsV48Z2PZ40ShGriPVLECabgrkVxAc7psbsWTTZW9LetiU5HBKi5avHIP_ZR.5Y2aIyDl8RX2H_KjvtAXPOjqTJ7INj2_D5aBI1s6x1KS4JKDq_ZHqpGsNet8cVS0cN4JF13smT22EQ7c4WzYmj3CN3DCM_48M1Ld2JvnIHgdaZa.PvYzIxTwS0VZHJ8RKLNLo_E9Mw8i6DlpNuOFMuaGN3dKu.RpPFGAdm7gQIuHx5zI_I8OyQu8OJSqjcq.F0ooiZltt39Qdm8O.wsDXWamxwU8ZGknvpwLfHNscHynshTMV_J7i71rH3VmqFCj2V8XQ8xzeV8NRAJTecOqExxBWSFJNJyumqKX35zstEntmuhLIUtVbiN..yx5_iXno3geKCr9bliaohQpQTwFwyR9CdWnQUogVFF_1bGwCth2bQPigiILaNRb.4cfqAK1u6Y.CRHCGvxoZBBS7uMekDBRIAbxgv4u5nquBPmx.36AL5fHPc3ePv8DFv48WqJ8wsOuD66SBNlk89O_HnVIgsur1gmeCxIgnXm.Z.LXCPA5J5o15bPWfXUgHfYPF.HHckGXthhOFz2a3vib3DpVscQbypp2K0etJz3OYNvF2oNuMLl359x.vsdshcbaOmaZmuoAG4j8QI__dXB"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9101281d694507ed';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\/4751296038?__cf_chl_rt_tk=Dursa2eatd9t2HRE_xIvRJFgPbjSj9WH8DKkptKrzOc-1739243540-1.0.1.1-8amgiiAvSclpl4zw_GWfOSSJ5vann3DXbKvgD9mwknM" + 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