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-7309642518-gov.caltech-edu.pp.ua/post/041855197619

  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-7309642518-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fda7b54ef30949',cH: 'Qi4L87lNFXtbaeybA783nfMJN0Wzs1XpjS7NpBRJJf8-1739206823-1.2.1.1-1k1kgY2Fpj6pd76Dsig9w_YiqPABkfzg9LToX6x9FrvKnMK4hU2cNDUiZEtEqQj_',cUPMDTk: "\/post\/041855197619?__cf_chl_tk=Bbryv9a07NaSLTMp6.DpB8e6nsGIXkmvVk770FXc1Hc-1739206823-1.0.1.1-nDiwFOKcvNf0r0oU93JO2BqKQ9uIV0qRmMQ2pfwQ938",cFPWv: 'g',cITimeS: '1739206823',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/041855197619?__cf_chl_f_tk=Bbryv9a07NaSLTMp6.DpB8e6nsGIXkmvVk770FXc1Hc-1739206823-1.0.1.1-nDiwFOKcvNf0r0oU93JO2BqKQ9uIV0qRmMQ2pfwQ938",md: "RAl0B3eL0J__G22uxth7TGPMfT7MNeac3ge7up7s1pM-1739206823-1.2.1.1-xRg4Qf80AUoF602UU5l5Ran__1clvTMh6BHGBBtUj9EPm6kP3pTnfoj2WPL9T6zqtT66gMu5Hv5uVFLbAni7g5LeDVscp1HQ3Ipx4v_XXAlUU67nto.PTEqrsvTyiDCANOqU1TAzInibww2IEQ9I9fzTxTiI0MJY28y8vbnbBcBShT5sTksSwxbsEABIbuvzG5r54wJKNaSvOR7JCrJ9ifI8C1uvEP1Tldwrkx4ESSkuLDgQxn6tXLtqLpxwKcQasQrlXR.MCdMguEn_x9aCFhdGd3hWxKhVW8yAtrkxOcmcq7OI66nRYNgp8YK8JYiJV_l2Rz5jiDOxatWTknE2KhRO2RNiG5w6c32biet6lI8Kq8PMj49zqx2DJniXBkrNeusLk7s0LWVq_TceKFGBMAApEidK0iBy5M_NpgaZYRYIBHbkHPbPIujCtiqKBWcuO53rsJx01dU5AvvonxXZFrkpB0r8TsQ1ldHtw5u3tC2QGM6emoykphTtC5MoDbf9hvkHGc88fstKMumFlXzkEobEhqEO1zcjC5qJgrAzXLCp2W.SLEc3vkLoeI1Go.JBfyDF9FGGMhD5n2eybklzYGmn._BinC6uH67jGmA6Iw9Kc6lpbJRA8mV0UiN0aqtPitj79MBt3nkbElam0g.zk2t69hzUlDAI0W2b7EI_NvbFgqjlqT.qbi9e.5uwHHrV9YhU7gqJylp4F7qiQqZ6j6EMCkocJnFK545vtLWNe4QyfxdT5tLrVfNvg5Kbsp_MmD2MKnOiA_N54MKSYFDvZXszDept6nL2ervUGwstU5XhNZgSxkZnA8g9j.UQPZDUPDDGPCispCVGP55MUKBXxAqj8oFr23YHmG.ZzMZHDlgUMvgj3uSvkmTme1dME_wIThLfVKotmV6RQK_x3dfqUqou85Gp6PGvkja_MOAmhBidkG24S2qQYMFAq7PuP51AVHAUFXYWnc3P0QbxDXxLS69gC2Ab0jl.gO6K0eebxZzszDoSH.NU53vpbTWz03Hqv4SdjcNw4g1T88N97mUIXuuR2OieznZYzCYAxnizyFzq3SZpc5GLJs118QtmXzpNTKYey1K87BgeM.BbwNVmP5nccC2gdWjLz6UY.2TqcSm0u0k3JsxYCDAQnof30mqYkeaI2bBtvJsj9m1iVM0j6Bsj89BdHcZzhLIPaeYxnww2mtMbXoN9zvqC_kS.h2tCuNavqI5ZxD3rKMcFSpsSkxQn9Csuw5ogII.hGpt89.tLYvnNNsqlJLQNA0QjnUss5IkIcNjTCowjSvSaBZ09SM1XjJ6gDE0uY5W_g85gkqyEx5paPAt9JUB.cumXAQyqu0MqonXqFvZWhiI8w07s24eEl42SK34DQoS1ZqKe7LVlnxmNR1Esj491zmJ52p1wFfgTrDk50UAdlYogQUpixV8iJ66s8Rk6RBnybn_CztFCXWgFqndGxlw4fszvHyRKD8ugTeZfvRx2JZjRa_nKg4TG3l1mKI_gzeuxne4K6EoivfbNmkcVbOQoP0nw8CwtsPmkjRvJi0mecHhASfpL0xXQlnZ12mgEEOEBr176oY2qBQSmpLUMK4l.sbGm9dt6ca9LH30H2UcKukpw3Ma9D4aVHINwY3PPebNvnRvUiMFwm3bl6E8FC4mBCoAltztWhx8OUVgen2.cWOVZYpjOnDw3duRUVq.S5SEolmykwnuWI4H2ojWSs4cTSkyRfCxKn0vopIpKw_r1RZS6FG9baOtItlx5ASdkvW4J2Be7EoWAgVQRCnrXhy.4YGv73D7EVQO_dATsG3i8FCC2.ABKPPMfZS83KJTjxA3J3hjWLW_YOSb0HhZysuWIEKG8IWG5_14PC6LaFIrnheUc8qIyv2bocP4BBbEq9_KzXmxbOWjGoMOoMFp5buJT5E8wt1YwxSsIE1ohxEpULitCgUxN5CjimA4t7DWrdwIDUWjOZ3P6ftN1un2JZsLe4PBNGllTyoCBcqLEwg3b_jhJQOkJDLSuA1wCA761ecPLcl6o1GayOF1eVNsRffi2bIOf5cZZ9wMiHpt5WbAuLfyp6yslwfFuu1sxI0VcB5JOSVy.CvLf8xHmc.seEbzmFRFCkRWKGhXs7SlyvypybNXp2.78Lwv_qRnQ9rJjmlApOQI.QXbNbtreR6Hb9zimeyYdm_sphJvpDwcsRLY8NeTEPgYsd7XMRg_Bg_5qd6T3fLvkN15oveck.oh6XacqhZK2Ki9nbc3Lq_gybohwnHtYoVqnJA",mdrd: "CQxzewXk0mS5naxXd0kHxl5WyTzrz2WNRzDwicbr9Do-1739206823-1.2.1.1-VuJPzPkZzG4iOU1uJksr9N71sHAWa2RgKks_Yf4.ou5xCGUOLmeVYqIftze4H0TFF3WlegQXgtoChaaqxTB2T2V1yd1ZlnGQNOf.xvuNH9Go6CXd_coQkpnPj4b14LIQPBoc_ZrMptjaHBkE2ATrYG3qmcHz9m2mXCVQO7QeJadYqa750f4rp6ZfNNhUupMejvvvlOiKdKXdQj9VK06BLuOfY6V88OWJXmdnh3l5diOEpm_h.P6zPFwFQzGrppPUwLIpZKU_3eoJDXYqLLpEsOK.4TXFqw3bT0bPlaj1seuU5ABN4BJzT93VeEZfUuMa3nbE0qFTXY6wBk517Z.UdKSwC7ptIETiRDF53pCsPZq55l2cAuW_M4o4GJWPf1qjTQGHn8.SdleUCwYneku3kbglTj5yNeY9WBjp8q.nyLtoGza.77_QV002Vk3CV8vW.05zC4gq9OYRZH6mV.PKFTOudgK07DFvcxdH5dXG1fDCd60WautIQIxRpWnrC0r10lhiHPfSwzGgIvkIiY.Xo8kJE3Pswe6jnauT4Ka0LThOiUUTKhPdxPCicCYjtA6lRleczZQZwqJcpT1UkNml2JNPl5m_BSh2tU_ncU6bQ1ry1NMSNtvZ1Wr7t1rTPD8LVkpLPda4qoaZp2gU6AftxeNcOuwaOUlo_sSCjXdprq07M0CAADuHEpQhnoPiayjdVhlTp_0rwgA4leTiUc8RItcI5qYnRd8Y0EpBuB8mGZnD.WBYoty4fL3C5qRiCtz0trIv.2aoh6oabYmQ9rv0JfxCBUZGAQsKf5k9Nl0sKlVePg1Kp08uehJfhCg.k.1J9i5PVRwtPDgcw4TPy9XYRs4snsd0HyQiPmaj2koYCVEn2r4lbBL9ojUMVwKxdaCe6xQCWCaLJ6vZJJLG8ZqVVnu.avHpZ.GavNA0ejxJWHzIrmCnytv1lk1JJdyYgtW_NLrMe7wlIMsMKKT.BMfMAq5yeYKPxf7C6oWHPU2egcXYyVbCy3bqfBPZstlAqwbnCRdl8bWS5gwUVXtC9XxKNYyeFagVNjaYDgb.LKwyg8gLSl0ONx6u9sNBKugWMyQ_laA7o7mqIeB_kGSGjkyOmuWbkf8UGz0CjsSV8Yk3_59bjKq9Mp72p38n8.iJWi3vj0LNhO2aiQxU._Qri.3AGZzQP4DP1MeYPthJqhv3bmwGm9i2B2CdO0OO_XHc4Aujd8mrNRTYIV2dJu.hgcg7Xytenn4bYVAK1G2oP8xw9YEbrjYtfpZwQYrFDl6SKJ3LxvtrbZKCCKEv46dXbYKOPgzaElcFxNUX4rL.WFGmpR5hX3kqMMGXJ0KkW5RGJsupzOUoYmccsjbTza.7lo53TjRh5qxD1wErWvVZ9poLXw7uDezvaLuzN1ulryOajPIimBXLcRa6rua.Ba03H33MrJJsO_TKWePHiTOA4G8rUD_lVf7RLi.f8Eq9at9JbhA7g75smznhAfWzPzeqrrHWjPN5CmcwgCj6udOh4ZyRvWo_Hj5nFs5MOZXOd104OAZuOt8yU7VkJipP69FtEayyBbOTjCtlczyzfuwmZL2zYWKfZemz6fRKbcY.4aLj6JznEhR3YaaitR9VLhDjXxJkKFeQ2Luq3UdrL0Y84KGhnXk5HrXlGnhzz0MQR0q44MOVqEZ7Tr4CktQnYrjiYbBUGf5PU.UD.hxvMtvgiIoQPjwGjbcMUnHegNcAu1Lwp_MxejvlJdLAeVR07rsW_OlKxmDvyae5XrjEpjpLuD7M13XEvwZ34eQIa2Ju2NGf3UOutlLxzQ93BUxIjpsWJ8xnuhj9ouVvqonA7D5HFQOM98xPA9bqmXHPoI4kWBXOntk4"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fda7b54ef30949';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\/041855197619?__cf_chl_rt_tk=Bbryv9a07NaSLTMp6.DpB8e6nsGIXkmvVk770FXc1Hc-1739206823-1.0.1.1-nDiwFOKcvNf0r0oU93JO2BqKQ9uIV0qRmMQ2pfwQ938" + 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