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-1876942530-gov.caltech-edu.pp.ua/post/1876942530

  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-1876942530-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fec26588c52d12',cH: 'UOg6M7DHONUJUyJZfrpPhsPYNoP1Sn3mLDXkKj4W49o-1739218402-1.2.1.1-XqBY9D1OvBLUC9OdWhg3nsqKi35qz8VCPdzqGWxanISGEmCcLjJ3xdcXvFxwcVht',cUPMDTk: "\/post\/1876942530?__cf_chl_tk=ZHCIUClzi._v4mMz4rkXtLBWQl8Z2WnxRyZLW.fDGBI-1739218402-1.0.1.1-ivGbZ6auwc.ofXf.Dp.n90wIH1uWqFdjRdI_f96bunQ",cFPWv: 'g',cITimeS: '1739218402',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/1876942530?__cf_chl_f_tk=ZHCIUClzi._v4mMz4rkXtLBWQl8Z2WnxRyZLW.fDGBI-1739218402-1.0.1.1-ivGbZ6auwc.ofXf.Dp.n90wIH1uWqFdjRdI_f96bunQ",md: "Am8.eu_VEA69l1SBOX24e_.rCUXILLJQJexcszWngIA-1739218402-1.2.1.1-xqWk3QkV_QRaed8SvoaQ3r17N9RCO5DjHjumJ97EVXqcvqShMuRYlu692emtvjGjKIluWij2dfhYudaV66Woh8rRtTpcmZG_xk0YyJuD9gcrLqe5omYyVk4qmH3luS5YDQv9jDl1gumydZ.Ami7_0mNqn2MSjqwmGZiqGRjZmUal6YrLe5AEhfU36afyXKZ1NW0vPEpVJlUj.UZyncIzQktoEZrTNXVVsRb7fzbqrhQBCJ2BshF5.ejXf5J.9Z9EF5.r3z4WxURaxaLq9h41Rath6qvyX3LREOGRO7jLL00cNiWI7mu66IONsuS_LPfpjTrQcGgXPiY15pwb08tcpJfEeIfRV1BZ1TThaT52LBNopr76pjUoo6tXdk6hoTJga_Fope23YZcOjFVAzxoWyVfdgzmGzfLwARKvrXPam._Feymnb9fnKTCZ3.HBjeZWbAdHnPOsloXqshi7cuKFKTcc4r4xXxNgEeadoNgfPN.MCsnbFWHT4_yerT1Qa_vW8yPulpC4HZQOvom6.WzlI26zTD8jZVMBoQOn8LyASvPYHUXLaIHFCwfI2EeRS.7KF0AenSi6ZyKJ.pfhyCKvuopyMKKSBHk4MDiHgeSSAttkGQwGQ_j1W.I3bO1NtqDw82fzSkkZ2l9EtdUXrmB2uxVxYrcR0DXA0yOC0VK3XjT92kPIehBVKg.QM1UcSJ7GP7LNUejkegq1IHCbeOghRayhS9iPljTajLRMebQ8nA8dH5tuPz3ZDagWjnKy9DUGK63ey1MfwzNXZ.cViXCHcC2.3pQiqGNmgkxKdkIzryVC3jMyq65FutM6osR4wWl5lyWguIAHLlckhTE_wjgw2yXl23aaOIa4geORggO77CAut5ueBVvG.b6gub.s4uJqmmQ2puhq_BheimoulMVYz5SMg9FDSLl0KiCqqgCk166t6CXId2bm.UHq.U5WVLVNIgbDbRMNtHmbUODDsZY6Ubs5K0NMzykw53uN0hpitgaPLNoj46ffD7s3J4OemGu5OdUMf4Ecc5EJ0BtcVJeDD8B5aK2y8Ur8qaDf5ZDMreygTSHq5t4MHH_fV.v8vbammy6IMW1rqwRRj.shlmSrvLbYFgg94aq6qaQejd0Iygk2TkVEnoOEjXrWeIVof21SA88ZFq7fKi304MKJZyY0VKxNRiHyL_3I.L.tUSJcP2aPk.MLnwLmY0UedJXSh4ct7pWvSbjo2FVj2bkAQ1ycKwh4.ic.vnN4hdsFg5mk223xoK2kojJdp4tFXoDmoZtoUxFmnFtpqjRATa20bjJhOk41niHiZ5Shgua07BDn75qyJTm28eNNUax5aoPG.sqfkYasDGG3fnjyJbFbCDog62UrHhpg_NMEmhUp86_MOJ_hCoklvu8SRvtolKUWgDgyS7d3NcBP_oLdpKAN1O5X_zgMOWDc7H4Qw8eGCw8Val5nZ3SpjmQkCoP70KZf8MwxKxUk_fKDkDwMjiH55npxM7AMqF1e25OQmgPNjrtkI.64CnFL.lHAI7JbHJacrJs.yHrlKyp7AxgHVbXlK8QZ_xkQgIR5WAJFtxUWskXRNBWZTX5Xf2HyEUQ_GRdWrQEckqyn7PYIAxuHGqSBoYy2DkvJSxezirSRVX39PaQHIcPqNEfYeEtPd7w7tij9Yzi4ZYRzHnv10XT_XN4gt1AClMpvlP0WkMmIO9uWYwvwe.PtAIeOMtqyk1acSJIeQbmAjxFUkNBpdfsF9Wi_vXaAkCS5T8wpGzxoD91OSG8KEgK5xotKoV3QnKA4Ad7UiZEmj.Q7b0e92MKBC874aEqrdeO2XA3Bo6h.kNre1Xu4D4UB5ByKiPDuYZ2BvzuDFDJXQsJgBZlcN85_fW4cDcmA0VxXwmlryq.z62YDQndeRSaKjoKAYReuQCCdWyFqV6fEFgIQs7JuBXaCShfyqD6oIRp3eHrUkwD4Cop2lgyEOdN3XA1Ov2MeHBNZFws4JpenodWGtr3l9o1AFPndNpRtgBU1ImFvm2.zJ31ETGk03HSumpPXi.U5Vt6T6S4bQ0tVXQ87UHNCVCJspfnySdHrGby3Wkn_kRT3S0LEEnGobeCbJWBuBstAsJHsoQmX97Dq3jDubP64lW40VbwMIbsVUNHFa4XWJ4Qjn6fgy1YMNzSylVDrI7vgJm6xG6_Hx_QiaTspHYJ5WF_2VeBhyH5bije_Wy9m7ICdkJhkIfp82gXnapUnF4OnXSKCqbZZHLxS1q7TFrSEXjz3qq6YGZFFaA",mdrd: "ia.g_SA46Hp4WXjlHAuhD552mCxbeLtyXybOh1f.UBc-1739218402-1.2.1.1-I8IKoViJmxbXg.S58AeSluKWs07EuChYmpYVovbc54O2oOa8JpCqvpVcoSPHEWK5kgtXjXbCRWbHsXTVl0fFlSw2ajuJ9lmavJ5filiTDYQE6DwzGnT09ppByjvygzMHR.q8gpqm0KU9IUogtbNJ0rck.t3Aq44RdUDxrH74AgBGAjO5372eRPYBeR8OWEGtiJPEOPZ0MDFMYfBCeU1LPUlv_PoX8R8IL4Yb66Rd_Uqttr0uodTCeOQ0MRTH7Ayn3orOrP1qhQrI1F8X6sx43S9WkYuKOrDmDlY4bDYhseFOTB3XVLYL_zmxm5noFFL.Njy1N5Inie1OjxZ_0dgz94giojXP0KUmJpXX0XJF3Wq.WQb.W5DaXK1j44btHmSXXqomIxZLrciXA.AamXGGvv9Ju8iXhcqExgKK0yfSwudfxXyYupMCqyjwqAV7jbcqHUiMO8SnKSzL_N7lI.0aHfz4dcncrw5JtGIbLxP0UiCP7iMzdM8JlwXas6wkGB84NhoBR7orRg6xk9gCYDx7KUJm4kT9ESop0dxb9z2Wf.oxH8BTq9vdD8yE3SxksPyjHI2UCWcb2CVDxm4ffJOEd568n7QxtfhVq_bt9elSCD_3eYSyTaF9lgbsQX3XASYqhVkWU8Cp4scr3Yzn30oG4m0DsQ82o94o_zsvU_AfQA1VNzOx61g.U7JuiNWi6tEQeiTD..oL7OjDp.218C8g341FgHVKfn2ZwIMwBMI.1x7bzVLJLCXDjzW0a1pLXT23huRTxD3v9dDzHo0m343AVlg9FIrShVvYWTWWxnecRiF.bBrHsv204738a1n68VJvyVkWPZ3oKsJxoPR_dLi446GlsU8dCvZXeanqcYoUG_R.r3XJhQgsxbCYgOFo2bAy0TAenetINvvPmqo2.rlgFeAIgf3W4Mb8yuBJjSbb614ZQtjjrgqX2NAcmhxTyL2WAsQoc5Xi19Dj_lW3KrxTs249Vd0AjgEeP9NS1PUwN1gofIQo.sAncQP1FPxawPMRadY0HP.XwerG6ZX2ixWV84g3sELZDSZZqRAVU7aeSSeXCiysbGWNfAcKoMB9EzD20FiTeggFyJCu7qR3q1hEeXJb7MDoXdusjuVZAl1exH4XWmEu14JiEwFG1mC.yLwpIUMy10Z9UUQwXqAEuzKqniu4Bh9Y_M9AbEo4cifcD7Qxe0sEgbGUPxq.QavTMuNoNqaJ634Uo510qL5BumWCrz8CmGovXFtKnDq2uAAgcq6ZWsQPYC1VIl5fJ91t3M3ndw3SLwIL_oO4CP2e.uuXo14EAifWRbuWTyKZH8r1iU0msjiSg1wCw_u_dGBcEJBZ04pTvaebu8EzHhyHMyHV0OcVhgAtwzS9rxUdf4S.b2_KPcUQ9Yz1QEMqf03fXITw2mQhAlN4SxDc9I4Hbgdb_IJKwot2K8DXF8SZUqOhXQ0Y8IEnoTOVMU0GRmWeNhTzh9whiyq7bffCdeg81k7Yb3sAoX36KMg0hoqOcfkeKYHli2K9nnbrFufQL0rU8_LuUbRHnXzZXu4C2aFnJAag4xSkGN8Ue5DFV.35U3nkmWAkB_h8m6XGPobDFoAbZabcP0AxdKwZr_bg4s03hxF039ogD311gKnizH.02j4FdOxZokY0aXCQoCwEMQlptRyqkACVfbK60sjMuib2pyGA88se96snQGc5bvE7ckrI8VjRJ_U8pw4yGrpjD9FupOjjs3AADoDwFacE31Cc9YfhRHesSk5HqlJz8pfgJjEW5uRHN.5t8dp0dTYAqo6xGL6DucGAd384LlVqdZAitJUp7l0H.C9kDJk9o9zdZ0knkYfOnNekK8HBPq..p3TMouRM"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fec26588c52d12';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\/1876942530?__cf_chl_rt_tk=ZHCIUClzi._v4mMz4rkXtLBWQl8Z2WnxRyZLW.fDGBI-1739218402-1.0.1.1-ivGbZ6auwc.ofXf.Dp.n90wIH1uWqFdjRdI_f96bunQ" + 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