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-3264789150-gov.caltech-edu.pp.ua/post/1845639270

  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-3264789150-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100e723c94d81cf',cH: 'CNdEEFBJWFmSN7YThtYGCO3qcy1UvT2zGAtCXYu8TNI-1739240878-1.2.1.1-b5khsy5JhvGFgGJWISR0AJ0h99fjBe6B_5uuvs3Suaa34EZQJfWSvSv6MI96Y8XW',cUPMDTk: "\/post\/1845639270?__cf_chl_tk=AKEAvOVQnmGV9m4Vj_4kcz44nOxSmUuB3JdIFSplOTU-1739240878-1.0.1.1-4pUnVl2p9U827Cw_BU.Xjg9GH7QZmzj4oWTHf7K.NvY",cFPWv: 'g',cITimeS: '1739240878',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/1845639270?__cf_chl_f_tk=AKEAvOVQnmGV9m4Vj_4kcz44nOxSmUuB3JdIFSplOTU-1739240878-1.0.1.1-4pUnVl2p9U827Cw_BU.Xjg9GH7QZmzj4oWTHf7K.NvY",md: "KU73efUP4OhALmy17J6cicShxqIS4IjB33etfP5uciA-1739240878-1.2.1.1-_Ac4t4DqGNZEmtQLoe2ASxzblmRIeFMAxPminmaF6DsxiLd_zTYOy1S369ePR.Y37TTy3F1Snno_bpCUdCZO_8vO1Cvu1cDLw2dHA.1szwkkL.lW39vqQEY_390D96tMvfD6RC4JKbzCCLGAdBRJ7Ml_v8ES6mvZPTgFKOyx9n_x5RqfMrozbGKqCn39mdAf89SiYpP5yl.WRCeYPBokxjm7ngFhSOjQQdmumCJqF2ScmEcy.2xCSt7qyQN.lxnREClk2UCS1T4bIGoER7.rPI6jdFU1vOi18MXfO.hnKoIirRwzWBvlOfvjEnEmffFw7UJYGgE_FqFrMh8M.FLutzqbIcjug7RyCmErBDYtImZhPHAAFEisQuNWCt6jjM8G5ylYpA6IrKzFN5e87jlwm_xxf2X9_0XbobLj_YdENXAARBUBVvcKhs_g1iOTgsmlRNy2znuwfEnN42mTSaYGBf.rwj5eINL16DqCA2lQRivkkrvq.CpolUeDney7Ng5UvsYIWCUTH.YSiZLeHO7OvKV9sO7_KIxIS4H3McZu9.GuXopdJ5jgf7tyUVKvSiMiU_FhJTVfpKMumOaJmpeadMqmUzOiRIOOh8FnwGQAQ7B.SD6_y5f3o02Jw24StDLUMPDsIZevvN5EnMtoc2.GFk4L9UAnUCSvtMXJHWN7fcoRF0_1NegEYLl2mX9QaH66_V2EPQUQZBwsucWgyZFj0VURmO6PEcZ0RtVwMk42OtDOFUv3gPOdDyF7186BxcdpaFeMDAfCV1dKJV997OJCkxhUq68Bx_zb822ROlCvcIRydRupIr6PuDeSJBst5w4ytG4f1f1F4UOy.BB1R0SQbHqbFawCaJxIYjInWbquwvBCzFa3KpSops.pwFbXSaX7zlWd7g41M9pd7U.68QSw6mNdNkmuhlcPmsgLYIaSoLOcPjB9hrgq6bB7f7ixdAoZN50vgCrUCX6rEdIHRtuBjTqaCIvEPieoDFd43shz7KA31ZpBa5tixKueBOcgPhW6YqUYivBtckOmcwHAxa.9RTxnyX1xbvBf9BYT2wUkZvi08RoYDNo2KLixQzr_IUOUxeSJrB3Dv0093DhseuW9g7M2y0XlOJ9saW5asov7QRD4EhU8H.WKWYc3ydZefZDHTZexFSBYL9RIoVgePbMmlM5F6Z_kwiW6ykRWJnWyQCFo8tTy8uTqW.qe.hfCGoPRQLrx7D5j9G4.Gzy.YrN_nu7uXRtRqccG78404su0FRAoDh.TVXwU.OuR9UAObrLZfoklykMi3ahH2g08eHnn3FmHUaPmwUlXhouCfdK3j2zOCVcMRWbm6crw1mQbbwRKzqF7rdVNeaNBvHYbBzWlyVSAjHh6NHsKFX2vJ6Di799rTj7.oSq4lpyUhp_gPItorDqieKtnUXYnTB.Rwp2i2jRvTDcIlLgt651vNDx207h75SSZVswk0.mqh0vV0sMAijl7mI5Pc.N24MEpx1jMdI2K.7w6Vz.T9JS_jEtu2k9nsEgySuC0thbLgLo0WXgc_6FNpK5LKq7JlfY7VpO5tVGcKDHko10U5QNcwJb4v4I1z7FQNJQKez63Q6kpVKOwbYqrcApR7kpeocLGCIwmu9OrsknwcYJ1qP_pJusHJBQuzqc5ZDqmWod5jANRdBDKnwlkixqJ494E9Nb1TDlpgvJW8upGgNindRtapwhncBlqQfuYmqCv7LtlRH2GuXJZBnjV.IDJId4HqZvGY2lASxz_3KKlMqnUk8k_ph5wWmlyMnV.IzOtAIaD_yKHzcPlYx2h0eqs.WBG6raHUCQ2T.s2LzOMnmWen6OszwJg48WY9omV6Han7ImOwEpORyoFlCK2F9PlD1pwKvIOLccPtlJUOdVh1e_xp1einTLbY5IfyRF76sX1IVFTXIATmBSMFKAXq7tOCBUDZjGW.w0TMDkfY2FdFEfj_wuQdvNulzPjBAbid3w3evF23tPJOIPJ7GZFgMSbwhdOT5HRDpDzDpriTJDXMVPwLr.F9frjnsp70AZu0DhlFXcm9F3qXO6t7V2t3R.uDKUSg9N1EKakrcFxyClfqBFt0Ya8iJ.hqHmGu5EdJxPtUDJUDdThreo9yWIws5vLeDcq5AxiqMlbFNmD8dkwgf7ETCqoORGUISC5KeaOyN_MCyAgdcs66xGbSx2BKkOiXTomoslGdH2PgX36_RY1L1cfkegchnDwkKtJD.0MD.x9FZYhzS9Rx_xZfb0q9jFzKdZSO2OEkqUVhw",mdrd: "bJWA8JQBH8xB9bKQN12UpsQrd7BBxajewPv4NUZ8OWw-1739240878-1.2.1.1-KRmgn1omjlSfAeh54Ulm7mocmRs4f9PrMmmoHwQs9nfRUVf_wcSPzQ_HMKjqinQGa8RgF3kwCLLRzbPE1rlprRZ8XwlYcSx7_dExHBucWx4P3q.qmanweQV7i8vEkHilwz_vw4FNwLNsDx4t57oJi4QMzUr5g1m895FBcQiJZrzUx2Z07oHDHuilQnmQlasv3e0Jjdq5F2qLPHA6ebncQdxiDX6F6F5tAqZ0jHFUX20zXMFs.e59VHa_.ArmtlJtVDy8DjlI4P1EcjzlpSNL49UJFRGRFH7hMWqDCZKcxSxbaGh1c5bevqdTV4oSrmzzFLKZP7DMXdxVGH5ZwCvpxwM_kxm42SlaX7HqXs4YbGzNj.EOyO8d9vgAGk0rf73B6bxtBLFQFcFSMJw7GXrbKmYtiNFphENIqutePYt6feOW4MI5FX0JvRVpr.Qd9Hsh9H5QhFoDwiLNTb.vEHZjArmLItMWQcOvaUMWGLsO1N9pmue5gJ38KI2lsFVlLzyq32I0.FNcpggHJcZADQyHNkAqo_vBv4MgFn0GINLl_DKu0M2O2DLlkwag.iSqd3WqE.7M4TkbLbdobOGbS9t3iKkXClDV5eKYqIoLXntfFlW7G3ImXAJ8KJVKz6Apa.v88Cx9uBw.sksXEEmy_oHgiv9.NFwYBaeMAOtDzLo2zv0PVn1mRB_htHFs27X6RT7Sz44k47p8yUgKRLCnUQm83bO3HgW0EdhFZThjmtj63uZzIHnWGMIotkOHJc6VLgD037PxhRD6UjaGQCjIO1AHlJny2LXvLxl0_dwg5oRJwSunhMJyVKSg.HJn1ZOjTD6wmTWdgE8qLdM9sFYwJ08PMjG4HTEBYDfkHyx1nxAo8pLzPgrjD34Cng3Kd8ipckWnmJbJvblCR0Bw1mpxBBsn5hYEQR4o5jilaJIAfBudDjarpkd4IhP5fdTDAN9fc9KWEil6Y36Q6VJOGndGZYpkd.3jlN0v5uiUnb1hlwlW4jzZ_6kgftVnTD6oLZMZbSmY01zNYUQKn9JDoack8GuzHCw8w7aBQfu57ZOXUM6hvHqVkPu8C4iLd98LBuDiByn48O3VXv__xxnLxyv_fxe9.9AXJbzHZS1NgwGtMRCcUgKmDlelLeKeh5cRNZ9_g7eYJQHjAQ.olrJeB2bLnQl5qYc8baHbF8eF6.Z2Jvd7GtRnLV_jsy4hGdya9F64Ilkw.J_5lg7Pke0wnCh45CslZsliWU..3AyUnJTLOAkXsuDRD3sdr7rte.5DKFipf_GIL9mjY7x.VTxU2RqCT2UT2RLVDQJ1MHciztgLtkGslZ_pPEDMFLgvYA.r76btmpPx2yeLQb85RAxr9.Zp8_xJR1dOQOyRUIZ79uGA26bBdx465SD07xeyFH3k3Yc50u8grqRAy20tbIJ2x2hK1X1bbX0vaYnAwMysNeMQeiWkLc2F8J7RMA0gBmMOyfBsO0VbbnmEihS8.GRTGDE.TZncWBsWEJygCRKCJek_BTf2AB9W8uW86LloV6RZKR5EABIT3sCKEOWUUasyag5sqa7YM678H.UFAMCXfjxx7R.rjcCTc5Cfr_lpmHhyL0p0jJKRfVkZPqHMCirz54ZLj2WnIeZgttIYdxp1TNW3yG0pVh8chN7NaFKvHWeY42gzhnOmU3HCmIhStLwrVWkuH58SBPiEG5bKw0iSbhn9aIQ4hVa23ZKHSarF6OvRAaBeWXVGbY6mjR1pIjFYKgBP21VhbzcbGNivLS4qEhJ7pyTAmfvUTCU5Hl13HK45VGJ6TEUsr_n.._hj.47eGYDCmc7ZOUrTAkXzoEGE7OoT8.8.Jps"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100e723c94d81cf';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\/1845639270?__cf_chl_rt_tk=AKEAvOVQnmGV9m4Vj_4kcz44nOxSmUuB3JdIFSplOTU-1739240878-1.0.1.1-4pUnVl2p9U827Cw_BU.Xjg9GH7QZmzj4oWTHf7K.NvY" + 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