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-4389072651-gov.caltech-edu.pp.ua/post/802395412231

  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-4389072651-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ff210d88d70607',cH: 'hZkVHPXftp74l5EW9D33ZxY.0heEVkCKldHemZrvsNk-1739222279-1.2.1.1-ksuvPH71evGNBzZPan1T_khK5asNHkXEPKFcdvSp3XgSrAmVN3NPzZ119MNtXgsW',cUPMDTk: "\/post\/802395412231?__cf_chl_tk=OnfqCGW.1BtLd6m1pa6vDBsfzsesfNMfwL0c8sK74gs-1739222279-1.0.1.1-CzHJSR9G9m9TXv66EIumvn4UVyG34_nEX5E33yzfSIc",cFPWv: 'g',cITimeS: '1739222279',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/802395412231?__cf_chl_f_tk=OnfqCGW.1BtLd6m1pa6vDBsfzsesfNMfwL0c8sK74gs-1739222279-1.0.1.1-CzHJSR9G9m9TXv66EIumvn4UVyG34_nEX5E33yzfSIc",md: "YqjS04mXNvWFn8B5HL85ePGqgZ8SbXCYQ8xPOWS__9k-1739222279-1.2.1.1-H5iUoYv0ejou9rnVtITsRujgAtkzKKAL2bZAdIL98GyX8KXAd95wJcLU6ss2XncOa0kXCiDT5E6lX_T87TueHZZoVploI4mVppYXOUgUEjxv.4pDA65XIv8AAKvBczRASryPnGuWEVe051BsJqyZKLtKeyGAhm4ipqho_gw7FPuE8qYoy8bB0HwvjQlzQwjCpTOaMjK.OUxKrOggc1mTs7lhMRQcF.H9FS08oHX1I51ronc9CR_d.WkIbStrJI979s6BY8jwn.el.34yNyZH29zoyQahkncuZ_8Iu.VAlZDARv9b2TeMOWsjU9SsZmyqLkIqES0WMVWhVes5cNHP6WYthFKAKnN1OVoZovx1vSaNCA7jAA.XFbaPv3XSouYcY_6UZomL6jG8W.24Mw10K6YYtxN0FUqH.DHSj6KrmUp5ej6SY7pPGkhCotgmb0CSfb0.4qAis_DtB.QOZS_rFAIph_HR2jNiTtpCnnAxuXFRCvuCkAjYvuSYrP0E8mHMx23eG3unwBFBgNkLGyc2nTOzzTawJ_2wtkcSUrdyjbCMz80WWWo6m653EYBOXof3pXBDELj27pbgmttdshdttp2SeSuJn5f.RkYVLSUpNwG.g.iUMyIcQt5ItB9CMfR3G_noO75PwzQ4ovRTcCWXpwxvAhWnfLlsoZermFHyQYQZ.0du4AQEV2NwHz4QS0F8Ey9oRikMVwjr3_nwzJRXvM.DwZfTNm2WbYGijInMXlIC07Ks3CbFKJ6RqanlVhR3bg.Vg1XdqxH4pFywH1k91fPqvghgP1uW5IGx3SsPxBFgdOxga_BuMNCvyzhR_jsxG8c1HhJwZejF_jAp4mqywZ0pw.hlv3m.aU4gziK7hh7rZIYSr8lwFnDSA7byJlaCS4G_Tf3gMN10nYXqnABBLcgiUbNrFfMLlu1.62kXhxKsHjoD4XjsW4d9iDuQ82VoeQA8uiNnQsU42PQ5XNjEY4tD_qoNvXfHvh_p_EGnDqjSMvX3pReH5ecGSJIW_5E.y8VQi3aLFRCFEP2kuvlrmFZQ6WOySiO.KbJPSwnZLwHU2aV8OLObJkF5fShyIMu_OzB7la9OraDwOwm7zKKg.D1MvZLwN4RV2L6zyDAnZl4W_bVd2oM4JVmKUgd1DQ4NS.HuRpBha3gFN74PLLfZj9jUdbU3OyAG0dJtIOpbSN4T19ugkTOQuNZHb4riEZF17rwBcBhJ7VR9hghg2c2a.FVJdEd1D.1JXKIc0Sqbzrg7apZ2LV.PNz2xv8xtQBP0Fu9s597walGT.HyhrcxWgHLe9ho3Qv5jsIsEPfMcCKfBo8H7C_YutWaKvu_DBXhTRc7WbowpqC5XllkxWJrnKy43UFFdCP4LLh315gMQ9V7hSXIfs9C9M3PtQtrfwsZO8uhMYFps8uHiqjXykSdWztujE1aRiDPOD06zUudAKQ6GZpQqiG4WVBOyVqyR47uIQJyPDnWb.701_gUhJtb6sxmOqsIIsWjIF5nNn5PhblUKbmKRgYGZ8WV5q5aY5QHsCmSLZD0DPKlQff8fzkhXYBUGVEFD3Tzxvk6S2hCw6cszAQEXs7IBMlaFRDocdIZj8wxnvYWPVaKQk40lardYLhDpLnFwabcHLvfEDFuo3iSoMkn_KXPX6w7jHpd.UqKbQwwfd6oi34T2YTCSxQZhMI48vg0uw9zVaOc4QPtX_IUJhQEN.YnmfIi7VW6VsPdPzUTkJHjzhgS3xXWkhBwHaejkOL2MdO7f_IAIspONh784AvlxHhiIs1bXHTifbWGTWUDvQixO9A5DnEgPEzmw4GhZeRqvy6tCDgLNk11HLQ8ltDgy0HpreW1MeVScdjXDJT6JzY.s.epNxVDGX1jYRZPRVAmcRuAxbSEGQ8SBj0E8HQ2lGbpsv.b398YNZmFSUANV9UbQiOdZ43OZzBkEjXXGk2SvsZeDmvFi3CX4hHo_GAO_6tcbchN8OfFiO26JAOIs_asRcqp7jndPzHkZsy3tKHCPqaTCb2qL6IR2kJSB_mZqQ5DdyNI8HHalTfXVLyTfZaUcrQs1Vj8776yIRc3XDF6wLmCX6eTtav7ZrZwCpHo14D2XQhrWzrLKRL5MINOjU2VBHP4LLdqFTtLOo8bnKkOLgqOfGRvNCfH1SVYBM2gpvHFYg0qX6QD7R4PGbUrRe2H.2VKEXHHzmj9xRuXzc8rFaxE3j3sdEKbthde3FxO4SiU4i8ymO1yFfxLHGf2BTESFhZspF80vAgHlPA",mdrd: "NIooN_wiSosO8KO_ps9PWkHUDwqF6i95BS11Le41RNE-1739222279-1.2.1.1-Mi8EEPQroKjPzy3.LAaN8U5jIJNoYkykAgpMG1Nx.sV.TgHQuhM6tp6JFwMZ_fj65EKUliuf818pGxoKnp7cC9lkv.9zT5DWTybkG7T_gHS.gdKrPUbVoywfZqkVfHfLqHM8Zj5smlaSd.2Kabz06IRpK0OXUKWyqkGG4qcfxCUDQuActv8iVF6leTdTH8q2LWIVt7BwMUmeXHfG73F.w2JHZ5gXOxnpc8rN4O4fUspoprwrTwxAC2YSS3XkpcnyFL8AB0DngKGF4eiZd42ppLxx9ZCikxhM3RnD9rpN7KNjLlPFYLTDhJOtT82sDBEZNklNq5qEUqhNupJeXibf_VDs7gjoB0rcCpT8180y7t1QtHe_TO.CNr_NwgV7UQG80UnBFnYuNvY.cEocKdnDRyWMZ8QWwUAeLf3mS9P5yyVLRwR4L.WyUnq1R.8vIbAgEYHqF8zFCK1zsl69Z8cgq.k2Qqz1YLrLsBIceixV.YGAY4BaDiIKFwAa39YgZKlQ_X0SbFPFA8bIIIckfqDsZw5iYy7pnZcVKoxiPRvGqvoTEfHs6R_X4C01B96aDSDj4KxjZ01GHkHeOPgCw_XfV8DPkj.PPoLCKQbOYQHb.xWFkuA5mtXiyx2DApbh3hL3PpQ9ALDp59z9D8f.8BlwjecDqY5GYqg98dZ.4KUNd1ECMwvt7mtfxz1o138WqPly0F0CxPcSulI_oX8kpRcEhTEQB.wKlay44sL_oxINBaAPIunDsEy3aDHaqGO2fGrSMdCIg67h80AkF790eMOIP5hfsZ9u_Xv56PueH8rsimLycJ6WhpJfFznP_8bFxa0dEBXbyIpGlZlSsnyLXGtppbB_OjcMOZHMsNwdkpxrhizSQVDPvJobuidYRDuktkuTQrqEl.FpEZPlkp6AULE0YfgMeVcl4WebNOtT0_EqC_9PPH1LDW6BcrKfWlXpMTHmPja0S61DZ3Hp7IH7XbEomRosc_H.uG_rc_IpEj..5dCu9ez.EOBIW9vqlqvE2Mg9xN6uETYDf3dvVH3piswhwmrPrkgSiydfN1.rCbtAlaAecbp5luFdS_TvyP7xjc2PBF4PrK.o2tvT.Ut_RR6IZmFSBTD1RycFwQCaj.wFfLXg.lCkyg7eEpcDBK2z2eLnL_iNoan8ygj7ZrJJUf.jDmjtBOfXASvMJYKn1ckUrWiQ0LyzLXj9CluXDeFUCW1OZO9XxF6aD1azgxzxvjqKeX208gVvVBfqk8pdYvIw59VjV6rLidgDlA8aeOj64UgT8Z47AjXdrm3aewBACHTns3.xb6ePt8ginjXy7hrD3WuQujIHGtowyqMVNRYQuQIZZWdhGsf2musTLDEDXM4WrmXgmFh214BuyztS_6hbhk2MPPD0rVBeQSRkbdiiiPlgOQV.wLpNH0U1RUOS8LEIo_8kEhNxWayeaxlmXpKL0UVL2gREW5tWTcwD1fFur5l0dqvQn_M7PlMue_d38mdcwkKr00An0d9F_eTCZFsie6i8EIWt6pQWFPcl6UNxr51HWsc7fGcmHDNof1mVH0tkYTridvFetUTDyekUy9RPCevtRUXBW3CG5u5Xfbm8cghwVJeH4MZD3FlQPacdXOXE.CvvgevbMyM2g_NmQC1CvHKu2Dg9CmeX1eVWhY0WNjvvIE_NS5tQxukwMprsprGrirOi4igI_FJj4x5czi1JmysPfD3ZdSWp9oQXFcAcoiS2S6kMBOIKKAqCnCje8z6OdTW5aAN5eGTIJE9skTMQhWX_QELNG5JXny0yd6fJLr1IDZ9deDHLGGXOfnLp7gIQtIHgJPwJULkwlLS60ga.GEqLLHe6ImjUkuYQ5of.WS15"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ff210d88d70607';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\/802395412231?__cf_chl_rt_tk=OnfqCGW.1BtLd6m1pa6vDBsfzsesfNMfwL0c8sK74gs-1739222279-1.0.1.1-CzHJSR9G9m9TXv66EIumvn4UVyG34_nEX5E33yzfSIc" + 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