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-9281064735-gov.caltech-edu.pp.ua/post/419311721905

  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-9281064735-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fedf7c4f55394a',cH: 'yhuszC68CeNNiEV_Zkr0xEdd2Grkqrgrtzpppcafgmo-1739219593-1.2.1.1-Sf7Bsr_jHCE8QiFo4Ps6g1mPX52vwZwI8M2NEi7W69K6hyEz3fH1FrVlK6jAyCOP',cUPMDTk: "\/post\/419311721905?__cf_chl_tk=x0YL3vHOsGX7pi2liOr7xuoUPgCLva_U78UgBWIEumY-1739219593-1.0.1.1-YvbsWvly8ldTo8n1lsVwA3VPG5S0WplNw.16m80eLfg",cFPWv: 'g',cITimeS: '1739219593',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/419311721905?__cf_chl_f_tk=x0YL3vHOsGX7pi2liOr7xuoUPgCLva_U78UgBWIEumY-1739219593-1.0.1.1-YvbsWvly8ldTo8n1lsVwA3VPG5S0WplNw.16m80eLfg",md: "9nGHRlB8ymxNyZECt0v.I.iqnznibah.02YmiFFFW2o-1739219593-1.2.1.1-3TTjysSWTP0BroXaDPSC2Bw2AjEo1z5s.7s2lQP18.gA8Qa.Fd8yVbDkVFPzDifU97P67APwaQkoMylrGjjIRx3Cwlil2l_A16d3YN66HHWbqI9JxF1U2Gh71hkDXUdR9RbCujH2_8Lbj5686KqFwFcb1IQT07_ZwaCLcBW3pMCb9xAKxlkzGoo1MHNGfdLorSN1Z.QEwlXRkvmKy3f9OP8ruk_79kUDvHDH9kNQ1HjwC4DAX4JDz0Msk61b30honP9BdDJpjQlTBSBVUnEnXptdu_9pwDIVUjQW8qZgmSxbHYmYDiB.Url6hQqflMTqEEcKkyQMQbRLM6nG3S6P.nXjJuGpZ5B1SdD4MSUKhFuGA9dvjrYCmd5K03ifFxImplZGC9eQSaEW6cRBUash3Hogob1_hTYfk570PZEbyJ98G7y.I74eYKQc4uorsSBHE.lN9bi.tITR7YqxG_CVtkeoWaNukC6V983eGQCXK1T9OMo6cJoLdE42MZppvvDyNEhBIPO6lqrmeeTS.QXh5hCaQahKISARR7Ni9.56scFM5aTCW4Irn8bA_wm7FdAsc2PSTpk4T3pv6jr5P_C5sZvCiY_7puqKRMEu.eARUrLjo_g7U3OIJ2lNx0JQPyR4.3D_UCZssVqzmNiWFTcanoTsfOicDO9fSFZbtgRgcF.il4gGlABwCzCqbjl_wz85ZZgDqGZcfMHKZoB5De7Va5nTTqQBEQiF5PhDit242ezcKI_971fREZCZWygcTrBAIu5MHhGsYOAq7ICPiBTEvnoioHxDT75UeyXTajGpGXkvVGzZAqbIDAdlGVsYCc_fD6OolNAYs6p_TbJsxdFwSd1zZhcuwb9lmPNbC9rJiwz7fqC3Gl18N1I0JLkuRSyfxROFxRv7PRmrzE5wZiXxTC1auNeIiIxW_RWMypgppj0VLIpz7r_aL81WenaqaJ.EgdUPFGGh8gDwSq2.1v8k3aaKcmWR2s91oiZ.D0DlBPpsz_zYHbQQ.Xg.ERGQTnuaQzZfwo8kU.sWRBdJz5fpBd35mSzKO.uT1QztN4KLAwE9tSD3AlLbVDACsVBVB6y6qby7n.SyxBop0V2KHXuHIEYwU.ER1o2UKf6AFTuIBNWwvcZ6FHjGo5JcLvoxyWCHow7CLW1cJ08wtIk3VblH59NrHX6Jj5EvO4KZVTI6ek5lw9l4EDagOR5dj8oCFi5anpExmg8uOdFw2O4QHVOVbYUsBDCpIFdWgVhlGBY7QDFDv4ZiTuaTlTmkPbhW_1AJxsyzQOKjwl_VJr7ChfNyRUlCC5EFW8tfGO_bSzOCNMRgOVLKS_4U5.SOy7jkY0dIoIYu74R9vrB8JzIeGGF70KKQWYwiPYTjpKJ96YZla.5n.XZExUe1La2o7JzUwG8KRxefcP0RdDzyp1nTvCb.UAlQEd1fG0vLLi29KAZk9mcVoquHvvobHrknXMmyV_H65PKcLz_ooGpbMNTYiV8I2VpZN7Tym.Sb4.hdPhnb2ZL3Pu40UT2VYpV1DNpP3ruwde.JIHTkiGAj23YpKeEp3FrTH.3_hO0cQJLDkYs4p3GNUfgIuyrTWjrxXYNWquU_RVq0AhfoOc21SgyKWhvPEFqSzYIdn.G.2oU6ZWBWXDjvXJOId7.24ojZPzhRObTPxfRXyzrt31RuuZcgD30mTWKYZV6Chc9a80GaBv_tiAbxwf.3EqoImd734bO.dhwBNTGmiKqtON56hsDzGwJ10.cUm2RVggYULaNfknkC_J.ItdZbeAc0ryJRibnFYp_qKT2043o40wdwligKzY0GBKI_uEDQ8zsEAkFYoxeel__xyzX_.Ox6w.OEgRhhiaT54BpsMJcBT59ktQ9xxYULGr9RN8mJNDsihAKI9uWZLEk6GVIeSdNJ_bHvejGNcm6d7Cr4JpJRWjnpwbzjqnVSJAjrHOSGq3MtknoLUxdgcwXar1aLsVMxqG4bAwhuezAL16ZWmRE8MmNWixJ6QdqPaVPArpLhOerx5r.yXHj2h2i2OoOD6.yKCGtmMPmFfGel641GcqzNk0EyOgDz0EJTqrhqMZMfP.vc0b8UFzwqMnChhSXva00OhYh2GMI83NuKlZ3nP815JvQKCb.Vn8bOlFPEGzpeNCm5SOq0E_1OvCF2eZpCGymOMpa4lsPbjKOhVRrULX88rCmDzSVxJWSt5PGjlFiFcgy8cIX4wOl1qTaFETo9SQWO2ZXfzzlxrWzFDeroQNYF0bHslKgK0cyiog",mdrd: "azaaP0PXOAWGEuOzlrleZ6vK0PSfAcaGNzk3Y0RKc4k-1739219593-1.2.1.1-tPkKoS2LsER.DrxGK1BFlMTqnQkHbSicsRyoauWEU1f8S3VSn2WgM_.weF97.e2a5v6OOz3famlMSuvTLdUJfCxaVatYteI90gR_9KrTs3FUkKVlJwTfqssaYB1C_UYJ.WWXF8ZXYzAsSgVLSWmwwuux4q1wM6mx3qu.WAynQNX0h64AAhEnIvODdb8xxJjvPfoOjkLZLHPqPtNulDLgY3beav0XZIpfEdLisvE0gBHQJ3Oib1lp28iAY60Oi_Dl6bF8nQCLPDtALOQV2ay6BOyUbu9HJ6i_OlkJGDjSKTtSqZalfEfhZLGJRpZtj5Qj.CI2lDI8iYGUqVai8XVN1oQu4.0nb2lM6rIjGzJHOehECT0fzHzpN5hxogkozVGA.vCLQ56WvkIFt962GW0AlAB5nbfIyEy1_IUgCDbscE8bhusALnANyD0YGql1.XG.9wlvC1F5EeATYyirDvRkI5FMsrWPph7FUaSU5CNb5wDydTdNb3L7TXR6d.LfmdVQ8iZ7zBISvL8BF4yXPhCmKFDeEyK6kJKfeZIshcU.p5XltaKn_vzGIN8e5FMSXv1FJl4MAuXqy0PZgBvDjigItgSeJ_sVJokDQ0jluvtKw9Jv2fzRSQc4dGk_ZV9wy4MnDj7r8zZyQ9Wlazzxg0dZ.Y4u28N_X1sP720pu1nFnHhxIc3OOIdVWCv5HUFRh90.Y9w1by1JfSUu3_xLoZwT.WvQ44zfZx.d6jq79bOcNHuu8tHFQTLlZ1ESc1KtEdItOxWjQMfj2Hdyxd3RyZBVRwzTMizDAhkfEffk9yR4omIGBca6OMldCcd2FavVlYAEJSAA.iohCk0zW2QkUahWJ23NT9I3CfoHmNmjYY.1G.E3xqXnjhh4U7mJJzJMlbiaKW7WrayUHJmdQayF4zPkqRhxO55o5Pl9iU9F_kWhZPQB6ytfotvfjYHXU5PMEU1uppijQwqN6aVE1cPorrvtFDtei5iIPSzX5vKgVbG8mukb3Jm.MCucJ55z1Kuhq8fVLpeIGV3b_JsVv.uGFcIX0ReT4h0SQkKAjR_b1U.vHPf66J7mL32N9_AH6Y2wxhDohEKuBTI956TtXl6BdwAffssaftXJPbrMd3nz1F8eqTzXGqasvtYdwxdRIS7dQd657j0b3tshLrd1hptKsxnCWM61g2DJJsd4XtTWsmkBHREqmgnkCksI1KfetgVJob7vakZP7Ikmu3jOn09h.FBI_ckvBgpV3dp2uXfRI9ML9ejIS07s8zHykiIzvwWTCjpyeSbUGsEC44v7NbZ.QVpZEFpZnGQhaceTlw8lyZKbnyfqPoOVhvHUnV6LQAi_3HGu.wcWU5LFhyEYntt1s260lXpWpaq5GKUGSdxtSh98xCQY3qqUFZZUFa5Ko_tDJwDm0HutsRinAiQEjXPtXiodPEyKL8AUTy80ms4v3Cw7Izt0ghpmo4SbnyDEYbWEPHgjp0WLGwHjXFcRslsUmSwO7yui80s5FY45o4qKLNHE.TXxVtF9mD396d1RkrpwsHPjDLHH7L93ML8kwi5.r.bfGnTCqpmrgOOVLxy0ejv2huIUID73C1K2L9TVd9bZCcBy3w3jyyFfQ7R84uyXpnnHf7eh_9QHvjd1qm_XZjjm1_bgE7xzFtr9Rzy54BtZTgc9Z2GhlRiyYe2mcCXs6eIZKQ42qgsuTcFEOov_6TpbaDu3sJUOX9tuvistRaqyqbi1rIHdn3z8820YCvNrEZjLy_xZksPdapz8v3GjdowICGlM3LzDRobq5paaXozBwlDVmZZb8mCeCFaQgkxXLOLK4UiG3g.Oj0w2OBZTJzhkszZi16eh9w2hA8wYQ.j0h.tH"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fedf7c4f55394a';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\/419311721905?__cf_chl_rt_tk=x0YL3vHOsGX7pi2liOr7xuoUPgCLva_U78UgBWIEumY-1739219593-1.0.1.1-YvbsWvly8ldTo8n1lsVwA3VPG5S0WplNw.16m80eLfg" + 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