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-5243986710-gov.caltech-edu.pp.ua/post/5138427609

  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-5243986710-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fd6f23a8077fca',cH: 'lsAjZjKmu7A15Fp2M6s5PC3nvLG3t2xFjyXlitabjSU-1739204506-1.2.1.1-.PRCr0MnRbSMgUczPtFc6yrRfrlbKznAZlEuhng51wZtcm1WqS5erMkmdnsvbxKo',cUPMDTk: "\/post\/5138427609?__cf_chl_tk=JJOMiedZksENpGvy9ZAdiswnAy5I9RS.27GKPNks7pE-1739204506-1.0.1.1-pkfXFmqWOClVA7DGjzCLy0qkhzK2cyz7qh4CxxzVCsQ",cFPWv: 'g',cITimeS: '1739204506',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/5138427609?__cf_chl_f_tk=JJOMiedZksENpGvy9ZAdiswnAy5I9RS.27GKPNks7pE-1739204506-1.0.1.1-pkfXFmqWOClVA7DGjzCLy0qkhzK2cyz7qh4CxxzVCsQ",md: "dgzj2sM508q8gAfV..k5TWnlHriBpK6ThSEsM_NPDWw-1739204506-1.2.1.1-9EQMC5PyxG3._dmd22kQ3C7BHQFmyePG6CDmuW0DueDVVPb46wE.o3AKNe1eLBvCemt9k3XFKVmAS5f6NKJiaW_vaDca42VLzmF0JHYhZZIFzxCBZ.m9PP8qp2Urp5N3ipCj.PDU.1KSyEmrRqjHpzdLulW21dZ4XjObv6F3__mB_co56Dk4nHIjzJb5UA3muVK6fjeE4GTAFtnXzCji3ZDv5D49U6EvhsZfCeGLMP3V8kZSDPfTgeQtomAJt5Ie92y_sAGxFHwXEWSs21NqZpfoWoNkUjR9UXfjcGXFN3rNG099tT70OV7aiDgwkgu3KqWsrWboCrh3SY6Hlt4FHxUCdtmgHZswZRDcSFIo9tTzfzgoTSCJXUxcpIwFXM43Ct2QLwUtkeNoe6iVN7WMOOGkDjzwiXx03_18A98aJgcUed3vpiV9SfCWwRHM1OJ8wcO7P.C9HVVM1jy21e7aX1dw4c76wxmGyQUs9WE3sUncIJpKQpZxIKnosm6hkHL5OoUZ4R_4sSbLgHZB7l7wjil4tGHRQ0ysw_u6Ce0wi2REZwqLN82OHSI0dxgXMIl8psGNJxWQZKV7DoUPDFrZiLNuZnQQPJSkpk.zp2z_Zt6Z583cGUkU1fd06w2YNd9MgbXJQRa579Z8N78FicvgkpXU2eWWPMZ8dCpsGJsf.c2fUSGh8X47dCPEF.hQZ_U2d6a_3QbtnLmTVIJO6Ctm.0P4M..BdJWL4j64TePyaU38fHHCNyngkBhbFReugSx1uHngdyTpOAU59DWCh5tC7LbJDLcKhEiHYlvSx.z_3UZkNgsftEDYdHF9l7WOk0pDsZ7Gnua_sPMwPBhnTlfw9goMXU1Nb6X6_5BrJTK2v6_hgKNsyfvuNhrUdIwFD7XXGli9ow8bRqsJRgka688rvFuS7RQzN7InAH9V52_9iWAbdT.TK8fR2IPZSfF0PkmcXQ2VRTW8ncCEIi26yUCj3DfVX2E6w72tCtaLhVHZnCU3NsU_oWaj.5j2Dsq34nh50TTdJjAlw2dDFOHMFaStlrwleWnuCWU5kJ3.1obioC6ayg.z.OnmqSrLzVT3ap20FgUVzeCgLlSJBJ1FHi_uORL8PqJD9_xNM4evgn4.ZbPkqyvSW6jMY3cmkvN9DD2bDl4KHT5Dd37e_F_Rq5zA9ZmQhBhSuHZoMhoZkuxqA7lIItlNffklMYydZ3qZdAQNo8EbViV2pGRQr2eXQ.KtNXNQlNybaQhk01BYqCvr3fQUdnU.Uin4DEv2Cw3ZY9W2sTpus8Dit_ij6vkpJytRLReTLHBOEmQt8vYaAOwbjGpoEyoiwcAOEIZ.2Y.IcwUvNd8I9Jopv7LqCF9wF5iMtdogFd4QEcrazJjDgfP1DKDxyjw16wiDo1j8Oz76EzjzMwsdM2sS09ADXuFrxD0z26sBCkZd8vo.x5vJhmMe7XiV1wdZNmWZgK_Fi.dcox0VYrWcXElWbtmdMPHY5k4hzMDpaMWwRZkyOE1qM1JjrolElI0T_OI0pqaz44SVHKzpdYJVnqBzIp136c5hR.HzgBws1R35uWr3XueQpYGdgyO6v_cx_BGoUlrC8bwKfwcvF2Z1CAsw1r9wcRx825yA.MeIy.iXNVaK7Jvt3h5WqQVtCx6y9CuKMrDGrAYMEYHmoY1TUmTnFM5EyPlGSw9_6ky3VtGc5sxlOKPNPrqVS2lwFi2HoSa9kRw7yCLldEv.HZnR01iEE7Z8Ur8flxhjRVzX6hdpaGwDvnniwdskx4pfFfWFkE9qk4AHAVLYD1qys9YmNf7wYOZKLxrKfnllUWG1JhUdTxJpZp3Arr4LQ9MDJMPivxvRLDsikrrbnAj3dwZYYqqE1xrVf7yJMTfnljg1KwFpeSUEJq4A3SR4LWKmkmjft4rc8ZoMvspxLJdpRWPqEAosOEKmKWF8jAKFqHeoGQa4mezPGb84fGlncoEM8_KZ2yqDmaPlcY0IHzJYsSUPZLOwO8k.6hNzdcBawrEv.M.eTLP6q8vOktn3tz1LWXVDiKl5yuzc1Jp9PtCsGRu94q97u70qSwtEdBYZEt31DnapirXdttkT.KRbGD_bqM1E2ad6V4_F8N6f0qyzRyCwFNyXJ_okDTv6jn8CSV1rZzyTP5JJQyISdAfCZCQQl4fTROLB2dAtO8gXqE2lsXfShAnGlRpzCvqh.rsZIsOf3rvPw8KHMnt4YHUyAUf13jVDmiB19M3o2aQCcbqM1gD_nXE0mc8rk2uQeEWY1w",mdrd: "aOkUSQnVKWbWzB7.dOOozX.L1DvqPqGkrhus5NwzBBI-1739204506-1.2.1.1-SXZq.QwD8Qp5.RlSiNj9f3OR5uKai.glJwPvx_THcMpus2X08O1qm3.CWlSyuYTr6ZyViUJfkpFiNpRHaTHXBTxkI1c7SNAaAMS38Bq64alrynbuTigCt8E9B7_J.ulz5xgl.rnds4aNZKEQZqO9ts7RlHhaCC2dZA.fNsWjZg3RogOmVM8k0zcSAZ3V7ipQyIfl9vwuGRJFOnH_dyVl7sxcGZ8WAq1fPqzQDYKuLK4xB_ATwAY2M3oyzlz2ofWagFMCMmyEAGrfl1N.vxQtHgdssCFIBTH_Lyl_BJa6TtS7M1xozioQC2bRLGQjgOIItc6DV8GI6XCCsjGDIasE8nVFr8JeSnCb0wxSq1rcdly_gy2K6mKY8iQ3n7z115MG3WRRWIvvKWxOmYWZMyll_fXUYYHzVrLLSEqCMvyAenhY1rF9CjS8B0_cu9ugo2atLqQbsk40si9_ssWuCNPYJ6abYvzGlY9SZkGeFuDvBTcWbqztauHh7FbBLfo3IYDYi2vsmANdLF_YzEMLuNVFkO.UbWNQtupVpVP5L5PE85HIN_t27pLcUzh1xCl2q1n90GAjMpTGdT8ZJUHXZQ1_czqGxsLuDHWZeCdbUa5S06Md07jb8oXoiBDx.52r7cdAxdgyuLkU3PysbmtO5I5CX5yqXseNmmZRSJ6OpKw9nMSN6QwPV0LABaySkOzUxUJwILoJM3SLU.TdmuOEaAgLbHEs93NSW5DKF6a4uzyupub3aVBdPFt84xPjA4xJxMViegSkeWnuVBm.7OJCz39B_qngR9V_hMCrBu4WFapZ9l_hUgt7G28IkCOP.Tz.xqT41_jTQG9z0YSoNDujAi3uxNd5B8GsfQXC8S7dd_ZA_5rHeVXrCbM4w1TbcjE8SLCwiqACYldgLg2F8OJ8DorRf9__97aJ7U6GQHxI.ObIoSLwdQ_xLkrQ0a6r8GvKAoN4b.WRfbvXYFxs2io3UhRViosJAKoRNWh_N29Bq0eupxAopfJSn2jt7WlfFYBBvBTnp2lbSBTlFg5GSesaF_jHJpVcpFzIxqF5ze1T1LuSl7bDOAPropBWQ0chm1Ap3TSmEEQj6RKfR.ivtymDLmmSFNwC35j22OurpvbKLszoOTJnd6E_TiMKDAlWztk.KuPwdns_64NY2hzp.Or4FcENKAKOANdExdD6wD7lxoq3LZkbn10LsjusuBkxA42BR_0t955TBlrcu2Q5D4q0eLGU5sbg_fDwIkqyq1x1zh2NwjQkajWs8QwZ7LUqG43c77g.YVOulkS63uKePcU6.LTi8tDGlyjZ.WpPYGOTwTUIP85N6ylvDd_23GetS9ZjzHJIUuaD5MRaFTyzukeitC6ACnWjVoeJNIwnE4BNM53NQd7gjCyEfBzPDoMo7USVwOyu8gvU6vteOiiU0.tOFCamuc.DSoltY..IUKQm3.kYUi4HSG.CvtH5O3YofQ.9HGsMA8iZuNE5BKqdw9XPLf9Hs8USHP3g5EiCIbgac.GUZIHgl0pHkUM2CKxDzbdl_AhUfxks2ctiKdf7Q5SqKKMCcm_RCMK1TGfZev4UgyWF_XoDWzaYglfUVxZtbOeMB9_yJpoVB2Ei8Eg0xnRyP9h2FdW5P_hs3zhTWLRp4OIfWm1.Q0IFbrHSbQ_NtgBFNPxhXG20iQKC9HxJYkgZvyROvjxQ5ZVnJ5DgVstJFB7S5BBjSlVZSexz_ao8dtQpXq7okSMIrs3D5gvwLLDsJlt29tYGteXJckFB3OZcAcgXsZSWuxLmJsSRw.4WlJh2HsbTkQ3LmaKm3o604qxr3U5fNUhpJLlDQ.OEm3JM0B5IifO.O7wuW1QXIshplJU_Y9asJmTTEIc9D25Wt_W8.nWMTw"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fd6f23a8077fca';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\/5138427609?__cf_chl_rt_tk=JJOMiedZksENpGvy9ZAdiswnAy5I9RS.27GKPNks7pE-1739204506-1.0.1.1-pkfXFmqWOClVA7DGjzCLy0qkhzK2cyz7qh4CxxzVCsQ" + 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