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-2379048651-gov.caltech-edu.pp.ua/post/421085545317

  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-2379048651-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe09007b56d679',cH: '.3U23yGwj3B3xJeCSP0wIIDqEhMjJ7o_H3gQxqJiEeM-1739210808-1.2.1.1-DI3DNNZV7mzvN1B2DzvZEVwIRdN7asuOnUVNQhNYg4VIpskE3EZBTl5IO3MgzIHE',cUPMDTk: "\/post\/421085545317?__cf_chl_tk=8IKaridaFYnle.SMuI7FgGXRfHl7GQCBW5JW8i6hL3k-1739210808-1.0.1.1-1LB6STN1YIQ7KGvBLl0vJz.5NnOlNqUpR8ylM__cgM8",cFPWv: 'g',cITimeS: '1739210808',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/421085545317?__cf_chl_f_tk=8IKaridaFYnle.SMuI7FgGXRfHl7GQCBW5JW8i6hL3k-1739210808-1.0.1.1-1LB6STN1YIQ7KGvBLl0vJz.5NnOlNqUpR8ylM__cgM8",md: "iB1mzTipFw716K9w6NfiZmcrXvMTguKs9Ueyt9NNrQU-1739210808-1.2.1.1-Yv5lWyz0jJ4EBbhXE6.ubI1UZ4oqrk0VraG4_KhKdI8NMZ7FDUejXlbKLBaCisZyCKw9jXnJ8In1N4UEtt8V0IOO5I9..vTgpROT59r7aNAQ3vBtmUqQIEVRkSZctDorBMVYUFOf5Dc5ab3yMH5RTQrD.NMKzzae1CHxvJsdGwjbDNEEphhS3_KVNDJTLiyAY_D8_LZ.jF4bX1HkqI3Wygkkwa9YfQGyyNvKeNT.ShkxuP0ftDGISxcR7MlWm2GOf3O7JIY_JRFoiez09nZjI5PyPRucSzEQvawmMWDHiU5WMaOqJDm11u_1Katk9qEuLGgbHT4knLVKWzyGYjXymyJ0hvPRhxcKZ5ngO8U_BbIbOYA.vTIx7qhyxZIbBO4mPKYy5cdaN_0V04Ditk1KfQJWxBVvgG3DmwxuG.tw3HbsRGilrfEgeB5K8vp13MVleoqG1VQgnQfuPaesT7xyJRWUuO6hA8ch.KwGMn8WXhLAed45UFpXz7Z32knKfIcseGcEK4Pl9I0XLCgay5abi1v40R8KUKuPYmKODBsoqFzIo0Y97Diw2vBmrqtUazoVvBvssJFX3YASyzU9hzpJ454NaENTB7.rDlBDQbMB8vt4PVHqtlLiNyNqgpXit.ywSh1WL2pfbNOVabG8mO5xemVxaD4NNkBChykKXpl9XiZJIyP7mLwzxPlH5CzWIbtx_atRX8BRp9wXmQS5Ejnyuam8b8AN7oFYRvkFJUlsWUVbBKe2tiBwhcpiKnX18wDDWm0LVhS1ZJxE7hdKiGmBbkh3MHa5iQ42gdGH4uAe8Tve14I04POhTEsUdw6hvzJlf1OWFue0AnhmYoZSfmHwIFD3SPSQuT7ZIN7jJP3TKqgb0_0_sGS1ANIJFWZgnUUbSOUtNY6g6HrwDYbjZ9r270rFkpB.lS1F38oLrASVppROZgl51nWf82qIjQ6rzEAZ5lXNX5l6CPEFr6YdII4uK5fbICzpos1NOMnb6dBtXPCZwxtf6ml.._HOQQZNeiAeE.mXIuIVHUvyIWnaIn._qMDgXVzINLWXSvf95ElApYvXfU_ZN6cVsPrkcByb8CpzVdrLDyOWGB7vm3dFNd8BIiavgjyEFOAs4qdIwK8EQzTSDbp7IUkOjgCYTVcshtxxzN8yN4O9EgjSY01mzG5O9LiLEPps.fqx5lTyYZm9kBL7ppDcWvhjeFJf_N1_fww8ZtDqz4NpSLO5zw8YsggeLn4c.Jelsljq423qfd0q0Ik3Wg8wuwm0ml5ezQ7nx.KDt04SUDKT5cfkfSdZtFyHR1yJUff8fljHlSBpPSgtb4bOAfulf0Qh7iEYbVGxd_ZfExYAkYx8AbmwjW8IMllYHV._GUDkRYQI13u7vUurs.U7QE9FzBNaP_T69XIpsqYtxoX8CCmDN940AfYd95El04lpOAzY.MKiPqnr2AJ6R4a9obzJpgkt2SiKbXfqZ4jH2pgEjsJKhEAjHaOLk6HbP0afpDzCciQVkg_Kg41VS_EJHcHsBLjDmdo5HGWKW9qJjY86i2rsrnd__q2FKrr0J59sTjr7CWk7npn6aIfL04QdaRS9d03BrDt9hr_t4y7p0qC.obcggk5o8ncGLOwIrPQWTCuNaycKN2mjYtzF6TJBh762qor319tza7YD_S9BFSsg6LOlZUAaiGkHyrE9f6t0zGbcqbZJubuOy93SQyJrFsNt_bSoxLVHse617PSaTg5odTrei57.2nyvZ7raToAJvNAJLwXn1uB06PXsVhBiaAesGL8k3nUnKJ7T7g8f88ApbieXrCZJFGdQfkzMZqhDLS6o.hFAvdk6qoCBywQWAkA3OuMuDFMcKK5ygSw_R06kEZCynqfH9ZUu8E_Ca0PP6xgWkc8SAezh4VUec0fNiVoFxphgN7Kx2xFuMKgRoNaSloi7RojGcW2Z0m2nTm0zjIY_siVZMYh4_5IMIOduaKkQNBb7dyA5XpewLKb84eKJwN0KUEGKwZrIbRFhlkIiaFFQu5pOOrZJfr1J6JNENGdw0gq2uupHiFRBsj94ScpzCIcqHyLeU97cc7fPmn4IF8i5KskTWBuxsC7HqOYzHU5Eax3T4Bg1mjbhCjEQCtHHjHzLnQU2q2WzQhNnGsjry2Q1ti13kkTsUxCW45hK3hFbbvEP_kg1g35c9_V157Nk8PshJ17nKu.YMTeJVRNzrSpFHj7zPvNoJ8V_XOQ_So9DoL1iHkwE1Fwf9u2qlrF6OM2r7loGZnEOnOCOpQ",mdrd: ".3qyHQpqKmDmY3jAo.laXOZ9Zl5JFKjOdYqwlglNwTc-1739210808-1.2.1.1-6tuh7vlfhHgXqu_au7CTIw1TymIMS7YbBZ2VytgGTSAqE.EHRYVWi.u0XsaDEl2kF0y_FlWRDGHXG8CDbBdaoSMpB8ZDm4oIz3_YwdOBzZd8IDAu.fuFX7FE_KVsl351Dn2KiOQTiRuMzn98oK8yDXeT9s.gcNEddyvCtOAuFVgutI42Ly9hW3cVaXLGq1eMGUnCAuqIPQLA5_.geSRYROiaSXi13geLgb9d.y87SVCZpIe9sZs8RaodXL8coJIrAFz4xM76EkMqNU6Lgl_rE2nhmgH65tmiKNPvOPgS8zn.Cux0K5mOC5JkoJMWubdnvuIVDU5iPJ4aCZY0bIGNe0w2d0b4XmlPSIRK_pml38Ixo2X3O3vPPRTrfB.zRTMpR74D2Vz.MjRBGELUFoTMD5FwJYcOyrDKC_nzlWR6AJkfvkHqlzWT_QWD.UlqiezVTCiHE60cGhQFnZtNYGXyIePQrSr8_1oBqHA9z8WoqVhzvW22InPfIAQjf47AZMz78Imy87doJjQZtypwP9gHF46m9NRbNyOlCX145ZxM3QS7LSIJYrM3V0ZT4NOAn_3OdJeg17.pfzexq7Og5LBW8sF3IQmXvlbLzICCTLsrROP_N8StHhbbv1PHawgBnxJY5lEuRobeBuxdblxMLvMU89mI6j4lKfkGnKeLd9.nL4IWlyqakRdzSaVzdKyTuPaPdVqeqQuqnkmHwcbE3yzXXbgP5MNdg4gx4AEGDLGfuV3Mnrl24HXfTwFcnI.dQcjjYcgGI.rMwTm3kkKHBkdHGpTLNRV.X24kuo88VZW4QqM8P0TTBAeoeHXoRExBY_D_E56zY8vEnMXy26tvv8G.sdvXqSx17FFUzwfEHkjjPgXZgV0nhiJnOcNO2jwLc6FyNcDVTQsD9mYsZ60WhlVdLk0_pfq0tUVOpCCQhDzJmXT30Joem12ltLdHhcRR9282A6pEmXwvD.pYj07zr2Ptap4b9tGDfbDjIRrZisANyGnJdQEypdFb02vwpbn4CfreRfZbqY59oB9TtTj01hExIL0vpV8xJBo_iuK3YjgYg_W5ULynWCb6zn0.F8XblgJoYQ03mbfg5d47RPta1BIL9DE2krvVp60mSk9RDivk3xLYlqEnfJnq4KEeWyVJ54rNWUf83o16Bo9BXZVZBsvXzXuvp6MGcpXeq_YGrShRhF.IN0.JsOREDqci9pgQyM0TafT617FaI2SXJadKaDpQWHZMD47lV1O231XtUvC8u7zwUukAop1SVBJZQEyHfEsw46B3WLSygT50ExMl8Ia79zIHElg83_3mAw.oea4auOvJz0XB4gQVTFZjwcuvc.9x6oIjRhwfbsOvBOHRgIMKPIBvdfLTyXA9aJh9T7iICnpSxlPqKNCk3Sd_IXLdjqkWnF_x24gpbOL.3_MX3qVPZ.EwZEPNu6Mq58bJaUQfmHieW9T3ZO3aFFBqZxRcafTKh9Jbvw1jSotrodVU.uxbG6PTnaGGUpGQe41_1lMV65y4eyQ05wgdavG7d.4QjhaEDHgBtWAbwBrLKwdGMIsicSZ1zEgr8FNvFo_oiSZ.FNw4hEp8V6bk306bPkongZN9Mont1yIBPcqGMsJLzWfGC50Wd9EORcQHB65AqW9IOPpzQR0tqgw0YfiozHTZjw3PAW4SMmWTv0Dai6uHueRkfyifbt1zblF4kq71yBYLv_JXRofb4SZmrJLsVC1CuDqdMR8xUg.RPZKzSiGagdcNVU6eUYo9H6WFuo8TLIL3p3WmGxtZbU1nud4KUUzK5bIDN8O2Oi7u7l2B.purFCggzinIEGo66OUI5aLIKM0u6iM11irlBSjELy3TiFcCSY6C"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe09007b56d679';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\/421085545317?__cf_chl_rt_tk=8IKaridaFYnle.SMuI7FgGXRfHl7GQCBW5JW8i6hL3k-1739210808-1.0.1.1-1LB6STN1YIQ7KGvBLl0vJz.5NnOlNqUpR8ylM__cgM8" + 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