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-8376540921-gov.caltech-edu.pp.ua/post/747488091064

  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-8376540921-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fef2d09a1407b3',cH: 'qHD5rz8fKLRbHvZjzZjZBp2zPd87hGf06U3ab20xQkU-1739220385-1.2.1.1-lgk626FLt7glgN.BszCI2nJp67LH1z2Yy4ZkQShwxNmakcH1vO8HT_IJmWhizJLm',cUPMDTk: "\/post\/747488091064?__cf_chl_tk=nbmRgLV7op9RKEKIjjL29hr2lSt.ix6ShuNsVXot6x0-1739220385-1.0.1.1-TLwVRes4UL_sJDCYNM4DaYclzxZDGkKYdHhBv1nadXM",cFPWv: 'g',cITimeS: '1739220385',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/747488091064?__cf_chl_f_tk=nbmRgLV7op9RKEKIjjL29hr2lSt.ix6ShuNsVXot6x0-1739220385-1.0.1.1-TLwVRes4UL_sJDCYNM4DaYclzxZDGkKYdHhBv1nadXM",md: "3SuMoCW.gB5owFVbwEGN1_IkONXzESXv3K8jQkQbt3E-1739220385-1.2.1.1-1C.dN_zZb6qebVU2X4JtlPE8jOyNUVKaHtWO5OLyLmyiqfNX1oIOjDbVOi7dMUJZv4M_polpEPQTeQvXrnwN_fY06JZ1wTIP_KjdhM_Kf29.GcAVS1kwB5AW6h5axDfhpMW2qv39fIj6XZwLN8Bd15dwKYccJTBl11a4lmxsMCAWfJr_lbwzl.q9iei3TN3orIIrMtGO8d9FuLAol78WI1Cmtn698BXI.nAxuuT98nxqvPu7HqvF4VlznFrzla175999lHBNM43Z2iG0MSUeInwbngoGzwSUJVnrHIWwN9TXZi81g2upPAM4x4R_JyzW7reA3ifiJD0_Hs7Z0oE4b0kOck3lY4TFoX4pAo7SMoGy4L.qRaTkFq_QqFYOmd69Afmwr_2fPeBDeOweNXNL928E66yjNhRbEVyazOUrnhYtZ9UGLcf7LmkZHSbPZd_XLSAG09bQHK.Do3j.5FCfPl8yDNc7INp5Y.LiOUlv4ga7J.0aq7GOdwefd2fw_3qeE7gx_0CYkfynHy5A5SoQWahHz.ZBvsznPFby_u24wucE_mrefqzxsLuL1KOFcCIM1oegDFFXzEDwWiN9ielry72oEqNQpLmhPqTmaOvJW0NxTPmBGGLQxaZ3Vo6U9XjbTSQ1WPeU71aGzeqSt_1N_.jc_9pLKK5gcs4E1EIfmSjr.CZ2Ncwm7J0q8WlXM7rkMCw5XiUcP4I1yAQkSHSQfPPIcP_cN8Bl3x3RqRLOfXatbdmhf7rxaJKmtJFLO6oml.qi7Tzs65leJXORisJ2Pv41mFFs8ctDEQ_bmrWrkUj52PqKjiBHo.br6klWFDHGMT8_uywZa9k_tUKD2aPFSerGwf1XiUSU5yO__eKXxj5PY2b_8TkX71KxL4EhX5SpvClGcWlhZQXZVHOTxdeuvlxKhq_DHm702TXmIGd2jCqWRYpoWdFGk0AjEjspug9ea2.Z6Jx39I076Hgo_DE5SDigjPITFv7AEJV15JyxbETvmI6ZoYkW70U81PSsY3NW_HWv7jb7XbMv6B_znYmH8gFVhka5kKQRpM6c8g9vqUIp4IdCixDU.RK3A8M4jSrWwruE76YNlqfm4COmpSzRw7LLkY5PGdClTIbHcq1Lh92NSAEZV.z249mwp4f1nInCbaeKy7V0txVpKJFeWtarJVSUeRg6KtVg55ujc4yarsGCk5OO0VXlFrF7funkDWiE.juTJKXkzl_N6HnPc8EZfx86BZOmoAmKAkdX0u_8sHO321A_Ks1gZGsh82pcRmD.Dt1WHJ2GomrSrM.SQuhXLWMLgcghJ6_.DV2hi51c6gGPD_ihCqSNgMPFa3wjvt3NMEnj43kLi5hCgV7dwtcfcmdNUzIDsZZDtqPY7EkD27L7gpK_lrr2elkYAyOzZ_8B6tA7DOg5.CWr8rSreIYgKpcErWyTiLj5Cssn1RWpgd1A7iJaEKDcKW2BxjmLPOrJob38mZ9eGCjCVfu6YoXjAxX.iq5.LcoC75F2Dnr_oypThRZrpxKiN1IN_uoG06PxP.s0if5b0nbQ06x6MuPjEwaXnvivXH8OCbjujHwtZgRvBUEVIj.mUqcXRCgo971.rxY2DgVi44NA8vabhYsVHCN8N23Uasm7buGRK1bmUj7BJKgPTBty6i2NkyOjZIYLPLwd58TxYSc7wm5PeDQ6slQU1TL1YyJKR_JSIDLdfCaKHRs8ixl6edw4EX8KXkg7_wXBzHMRQqE09M6N_LOjDsJaV0gXyxHSk_NhLFu5hF2uSKdT_qLxsC0DkxqxlLDZtSOKtz4Tvy3sy7RxwdKsr48H43f1VqXVD7zvyXy4os2HRLUZxMBVu6M03.Cj1qv26E2xmX7OamFlaHyH2qDLkI5KTjIkOprVK4jP7uEMqFAet5jpGDEbGiN2d3.TkmD6Xpg2az3Ui2mScP_ocUR4tMxQwBY8PdowoAN6OWTegraqPA1M_n3TE3pcCYh3ToaSYZL17C8nM4NqMr9WAes8vdecdbzktQvJcxKesMkhYEisjIBgBaQXaCK40jLflXUbuon4bSnV6CNDAGcTlEhX6f_K9ze4Wf2iikFR0.vUA8dF5VUfAtSxYmlttMuIvgOBNCX6AXMuc4jYh.71je1BsScKosn0GEG9wIkK4soNNNtgQH91oh11PZlqRz8.S70cgLlofph74gtYrOcoLvKOdzULh4.Z0mB6kTMQsZArMNBCOLnhcShpmeJ6hV7fNXyrUbydWdQgbS0XKzpJ2ck4Qw",mdrd: "xKaasxNFxA11lXwIONvPJHo8kEgwFn3w7_E_8cMa5sk-1739220385-1.2.1.1-v2LyeWyEhEIn6kKxPJ4uZeJd1uI_aUbN2FGWeF8TkVU84ZxKSGplRIRtpvd2nXA2NXb.hdl.fhzNtWLzM0RC2gwb75JoBWFx8PogIuYK2JgQVK7kBreuM02sCUKWaXEN3DeDmY_jolay_XkMbOTfVWjyMbfdmIJ9f3m44q7urHteXh5bOjWJkpye8a9ikLOQjudbs6A5O_M2qkxT_zDaXO8q07ozMUZwKnI8JYAAOMbCwQxK5Iz4Q3KjAsN4PDFlfNkumuObjXwWqnjc6oSSbFg02mQZUeeJCrBX62Q6LQgpGDf8bMHBad.Xr5NjDw6vepgJVXtA9TWCXtKGUutQx0lFOCS1_Ax.nLLqA86wNT4OZ1NwahwaP4FJAkvrfHA3uljG7YK7kgw4q62hSv1bHODwGxC0rHN2ZPDE6ZpVflJ3FS0dW4yoHKukhnlun4Cu_cY6aZFToa37tnlFnyxqW4nfDkVkITJvKFbwbTDETyCxWydF4qJJm33U2LCdRaJdfDuOoYAPX7CyzbxlIHgTRe6z8Nub4tPuKARCaMicgTAkzgIyfvCqKixNOznra0G7mLdG8u9CNlN0quInWEK5ZrGS7zSlS0B7FqcnScXiOnEMMM3NzTwIyMf8LOjilac.MNmpvlcP7yKUWq721pxAkYgdwOTtUylFNstRVUEofEpCG4kTmJBVAMkhr31zLjLWG57fgLysWvzd2ynBjNz02GGeAW_fpyaIsxKDeeq1lyfaHiGM8kkrAu4RZBymBAd6ocZxC41fzycCpueoF5Sri9KkWDS793BZ0ROcaKKtgV0FIIC21ndtmAhnUrTxkpzdo1CMT4_wMWsyMjWpkeAzO0X.Kz4RQv0YU59CrIAXVPU_CHPFF22B4Sphe_UH_axQl9FbCFnQ2NHOJwF1vIy47s3VMsW8nnxDtkQOx0OUXAcxIMucGlFy99.EazaIg3gtJ93NQo8KK9ii4Z4LoJFbtTy0Xx3n1J9jgavKbhzSg5VNxTCeKcy.pEJVN3zXHwGmCmpQyLLxnwjrjSIUj.ZNooHmWyNYYY8SxOuYT7Ljjyx6smqwMgZGP9oDQ3VgWNoMywVvTcRUH8kR71cLYJKY.0h145wv8caY0tv8GBR5nEYxCMSpWlMSEcwRRlhUNlaQH2F7KPIXF3GvjlTGHj.1PhF4SY6FDL.TIwD2Qkad8utJH7pqCwJM_1U5Ro0zDMGdSTvkWuWHMw8lnG1q3h98V.gSE7o86Jt6y8ppBxWT7XOitDClkmDk.ChUSEi5qUzO6HquuViRddoCVByNX52o_kG7ogyhZ6ynpHio1UR9L3UMi0YKNfhVikf3Pd0Lm8s9lop_Rm0QlJgnyCsQpK5ZShlIQYqofDcniWuuwD1W_ex3s2F.jRQxud0zBiliFZKOrOj_D1hgktoJyL72aaWZzJ9.QpX8BqPDoKf8hXaeWlpb6.Tc9cf4MSP3cYjAJnUA9YfYzsPJl.ou_o0CifNgh_c91m1978enJo.qibMcsgVrQVhpPTrKoM4OCS7gBMCLVuH7ysD3daihX7fG.jzG5HLR3zwCZuX4hV4JI7vPDfADoqup8KDxA3bsoNIDWzXTmXwnuruCZiVj9EepWtnoOkR29rjoxv14M_85ivowea52IEbn2ndYyevqUEytDk0S.Z9MfdvKvbZjNlKDBaQgtAL_Oo_Bc.2MvEjp0jQwq5dzl4M9eKeVXEri1HP6KQsZJImeC99JXQ64wTF2KsOl3P0eucfpj28Q_3oKIJ4NTUtjlvFP_4lG1P0s9ETPyyRSudp2Yt5gSlR8cw1NdfdeefJ0IvdG_rkRKdxov0kv07K2Bq6iKAAaar7RN91y.m5U"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fef2d09a1407b3';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\/747488091064?__cf_chl_rt_tk=nbmRgLV7op9RKEKIjjL29hr2lSt.ix6ShuNsVXot6x0-1739220385-1.0.1.1-TLwVRes4UL_sJDCYNM4DaYclzxZDGkKYdHhBv1nadXM" + 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