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-2763405918-gov.caltech-edu.pp.ua/post/2763405918

  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-2763405918-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '91008516bf1c3b77',cH: 'gbzAi3yn7PZOS4c3ux2Aa7O2oelHAXOciEGNPmKWv6E-1739236862-1.2.1.1-7gzY2g_48CaMtbgKYy0BcwbD9gbbkJA7Em7mX.AJmot8fKi7N_PKnr3lg7w0dTSP',cUPMDTk: "\/post\/2763405918?__cf_chl_tk=msXQsMZdnvGBvRhbQSpk1phabLep3hQrLLA_WkY095Q-1739236862-1.0.1.1-0038x3EWKFmqc2GlBins0M9ohONnc1EA4oB9ymhEp5w",cFPWv: 'g',cITimeS: '1739236862',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/2763405918?__cf_chl_f_tk=msXQsMZdnvGBvRhbQSpk1phabLep3hQrLLA_WkY095Q-1739236862-1.0.1.1-0038x3EWKFmqc2GlBins0M9ohONnc1EA4oB9ymhEp5w",md: "yaUXHD_RsXWMSg3lRjzEmw2leVlc.DUKqOqpkAeL6t0-1739236862-1.2.1.1-HVP3gcZnd8pctvLBBBq0HIpqUlEIUEbO.fuxOiUrhIjov0_Ezw_iw..8aK9oAT6KLSDZtM3LBIz9f_l.He8C62Y2Jh9foFUgKY_7fd2z6u5KtFK1ssykrKwHOXMmVJl60Aq9K0Sxzt9CAcJofETCGOE56qvMaujQchvhjQbubrCMWnvOf0XKAtNjpn687CarBUStxJwG375LmySN9gc3kjGC_oQY8_cFpeLrceFW0RxEBo7Lk9PqVdyU1ASq13OOtA2CMxddNrSfYhrIug7DWstqcw6misAAE0nCi0ldYvvYj9DtzKogUHAcv7B.SIKEiJSvWDm6SwcYTF3MTFPbLh87ddabk3oPm79k1jedr5VdBWi8W.9LJxaZzuWcNeTyqzQ2KHP9DT7ic6o6Bun4PfYT_MQDDx6DxkWHzNX8CVBpTNnfaooURsKHDL792.BzNlsOdoGYrVQ6kAg_UhPZZI19jHvgkRn9dPNN8k6Pyuqd_cvoYUKJbt9RvSYAiwgl5FsFDVruAd5XKBSedp4KF_E7tfOWTYM0msMh2PykAmgOlCk5AZ1G5RnRBCfISguc7amppIbeswQHBRDpaJFVj1jaC2VnBeyq_tHDlcyh8_SCqJ.gYUr54bzeIBT68Fy4btz9.5wz_roKFsmaeq16pKJZtz7.Aocu5jZB_VI9VfTFCLadmRF7JlTfHkq3Svo8UJ9z6l9FTW9NhXBea8K0gl2gF6Mlr2e2wPpPVUHWp7aYRNGIwwmDannuCFMfj2TR542EfgEMx23QjK0DmYZEtKM3UFBjaXWyD7lgmaRkaXQQcZPZKO7uwACQ7owjgMk0Z6KtSbvX5HhvvTVyM3f920h..duf6OKRoOWTh9gWUjXAJRHPvzf1eGeNY7qWMB_LjFoloweePPoLCM3SQ873kzn292ofRAyFvx2Ba9jMH8d.s77nb4ZIyRFFOF0AIIgytl7Ladk7h7cPVJurwG8vytjMKLFFPcGv_x95.bQdUydudUnxNQNyhX1GRPZK2ZdNuRg7vEWOXOsGM7R.scc4NA3XHtTtBJ0Q3_cuS7Kuah1GxCTp0LM4j91r1IL1WzKS6spJvN6twweparLt9Fy3Qux3dLix0U96IOKW6cy40_KDB3Ns4ufKe38KisIxlL8mrzhIccAPngL0wCu2AExoGxVSsEoelSSC35oq6NVOiqXNCGiczVNh6Xwz.qNDrET_983HZwRrm6OPcxhXqQhVnNJOr2D87r85d1R0WTHOMvNMakU82LJEJ5hLoqLtJS137z6kQDqLBxtCQv0M1rv4EHN.AENYmGs9xjjUF2BI0XFuDrgV8tn9Gx5pDAGcc6wvEujr9xrR4Sj4dNWfzAdcL_MlgnLD5zljT7.fE0UzPbI0l3MDdLA_whuDJn3B1z3thIRN7IqBdnM0g9Ff0e9gOnSCjBtNeHK0TmnNE_0MtQNHWPpX745QpBNd5KpdtRhuncNGqPvrxzBwH0PAjDb5PA.Z97trfzB4jv8_CpNERwv6JrdrEm6nk9y8_29CFuzS3ZouzPJuumkG5ES_hUTd6.LiRzehItQVOyOKv7lSjwQ0Kb3qnpKe86oZiLO6lTPEIkxFKxkxRFuRXXdEqpat1zEPKjILbLRcfLpB2AXXU6AAT6EKjE_FmDQEx48srbZQE_aEY9McjUzpLzecI5pyyjXiqYJ_hi4q.Kb8nCk016JzRlKwLqpz9RZwTGaNRfkqhM0mlIBSje3pQl.pkoEklug58cXnZjDbwzUZ.1UTCgBRMcq7vzrrNJbYps6Yx.ED6BjcpP6aU2uY.gJyRmKWx2qNdWBp4hzVJ5aF_s_NO2vAXohvdpDxhKJRlIU0M3OJf6gVbWv19q81qaXqK2di2Es9hlUd8.ojvThXVPEnCHyqat3lSXyJojOdO4TPuHSxIFTCLIuKr1GWNWPJ1D.pnLdIJjxi__sFu9Jj7qMSMoROZE2kag2UtdSOFw0k03bFTPKRHEEEkfm4DBk2AACkZ5Dm0Wt.M6W0gWQWBw8enMMTCzEQPN070.DdEEpSiST.d5GiP10CUMdfQw_N1Ojfv218My.1VOHYhPjmC2RITIg8WhG3obZ0Z8z6OwE6CFg_t7FKGLdIIXGrlB5weJ30pJ6vxtbyUP6tpB5o69UUZGouJis_q6a8Yfpq3o09QPaVll0DNR7FXTG8.Ox9CeAuPQXiXGVi5qakzX50hCRasxb9bVZ8uWHCwFQrkm41wp9CoMLTddOXiq6pCOkkBusmxg",mdrd: "en.c98G1p64zFCFGCnQtt4ymBIw.iTDTWY995kobeCY-1739236862-1.2.1.1-mnyO4uU52Ta2JDGRjQeRETwMx.iXC4B2ANOmsObs15KvKChJ1fQNuXu2QBNKJZwp6xx8OIxrFYIXYOuouMV2ewSdOUWGqlduaJa.GzfuZD2ImXUB2brUD2ZaSu_8pdPA2xlPQMB9Ay_Y0X87zFHbUyE0OTXa4xcOGIRiOsmLckqLXz0kzn7XhY6nw52r0dEGds.PSw.KNmp74aGopaPNxeFiVc188fU6yWLCKHB84XPy1kd2X0.gEPfCRdPXtvWblrl.gh3j6_TJPSf3GJUtp.szc_m8RATjb3uRdl2UxHmn2B2V7Bn85vCXRpZGQNwWFfTsyLZ72if2elsLqqgsGocdnSEVsQLpVm.B78jU6GBSUDXDj27n9dk6ZWOZSUJSlKCZPgSHH7RplpZfzsmfAwj_qrr1KdTyUcrp3xvFHm9RsVB_HvMMxrCXOBXNdMyFC6mBkXpsW6lkUk3pPWz2t2h_miVgADwJ05ul5Jfw2Su4zWaumg_1GlnElXKTXLiSJCD1x5L.4h4exz0Zh8GuEERVj5IoGf4hq7JCHxvXXOs0gx1os26H3xPymW4BxveV8kqOqFWhS2vAiqJaSZuE7kFbF76IrMq9gMqczuY4IfsVfnzM6V1h7wOLUI2z1V85rCGhpMX25FqyQctQ5VLMvab_9vhfXrF9LqB5IbZJtk8MfQ_xJmBNQc.1YmYEp6qgtKz55nTVIwV0uABQXLt5u2SDO54Zw2f_vWKiN1n7Q1S0goQByueAgmUGgL8eI.oBUh9lAgJFkHSAJf6e7mRho7sOuncXjDxZ9lzep6i0d_9_o4CnfMb6xMx5PuEOx3Z1DgX8oIXF2W49uJA0ZKyIsOHhE97.ShbEUvdDVk9d7fUJ.imJJ9pkhg9uBFRobi7ywPIqHA7jQ6uMQLxNJeYEjeQLL9.u8dqrEjQTZsgt9PkBbUCsxCR1bZJ8tgrVib71EY7Md0T8fqxZh4zgABJdjVwgsUkxZSC98fJu.A7O1_8fS.MwEki9hj45UOsHCSVd7qsnX.TglOkCe4tmZFU_Uh89ip4OV1OmelS195shiFTccDJwtEgDvEvb.6nWz6vdmv9T.fdysa1T6sJuarBZeVgaIL9xxbui4Yuk9NgjoNlEAVmXXpFzourdUEdXtuGzCq9hnruGXu_jwqKbLSiqrgB_x_Q4SGTLszVwTOO_m2WPDAYL0KzfxAmjiDnfuRmBW5Wv5iM0cYAh07nUux6hKAC0ecYJdjt82u0O.DtB9GDZLAMB1LuWUecQusMNNE3_FD_qeiEwj1l4ZQ9S5h1OCqpL0uz26tUcFLQ1NhXZTx5Lho.gzSGkVO1kvjZdsVR8ef8LWT.1PgZNOJ9doy7zFizt1fIeXD9fUVcCVdpk06NpHh115qgX2WB6DCwv3ix7Numr0yEV0x2Ssz7l6xncSLCxW5Ukp5Yhg4C5tA9OYVOpxi5aUIPS42i6ZrulpsN7CKVrTQBqjCcSgObn2Q6sNCur2aQtFyJsOyzg2q.1vUGZICIqIn2cQaDpL9ag02ak0VcY.OTtLkipeKG7crsfsI35J9PlAFZWccn70z_UqQNUHsuj77nmswAbLiKGB6FMcoxAyk90nBYG3jWjeQkTSxnYeHw6adBnKNGsEWpd9eyGpJQNAjA.IuOCZ0YtsZ8tsPQiVdMzDou0blb1PurPCsDm7ywUGIYTIV_CciDxew5fN2YOHmyw9MQOM9CojW5et15JS.bEVWVhrJdSHMrFMx6zB3KlLIZB4Rm5P6ltSmMpFc5j.1nvAODvLFdWsbL2trPXfW9L0W_vBPjI2RMQ5d_8B4_KnxrKqhW0rlvrc8Rt4JfYiEY.jdiH9YlzwVF8"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91008516bf1c3b77';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\/2763405918?__cf_chl_rt_tk=msXQsMZdnvGBvRhbQSpk1phabLep3hQrLLA_WkY095Q-1739236862-1.0.1.1-0038x3EWKFmqc2GlBins0M9ohONnc1EA4oB9ymhEp5w" + 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