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-3247506819-gov.caltech-edu.pp.ua/post/3247506819

  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-3247506819-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '91012c8b9c61ff06',cH: 'JUWGVH5WfmEoYcy7peG774beue.5eusOqHtYH.eno60-1739243721-1.2.1.1-yVLliMgGMP650nJ.6ySNb5D8v1nE3Jg5o1N.nkte5llG6ME56wBzzXidVhdnQ3r3',cUPMDTk: "\/post\/3247506819?__cf_chl_tk=2pDEKU1MUMXSvUYpZp7.bcUHOS6IdQcyhqndZzfBG5w-1739243721-1.0.1.1-XDD4Igb.C8OdAPfpJf.f9rZ7g1hyKbSM9vJCdgj.PJ8",cFPWv: 'g',cITimeS: '1739243721',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/3247506819?__cf_chl_f_tk=2pDEKU1MUMXSvUYpZp7.bcUHOS6IdQcyhqndZzfBG5w-1739243721-1.0.1.1-XDD4Igb.C8OdAPfpJf.f9rZ7g1hyKbSM9vJCdgj.PJ8",md: "eK3aJC5ytGTeIip1BBXfjwr2cGHe.JZQTotpgdWcEMI-1739243721-1.2.1.1-efP5r8xahGlzXsptfRrwAEWmjWdHVZLZDE7OwrUUGs3jfNxDasYWuk2hijVKbi.shcULQMPTMjJCmxe4Qkiq79vhx4_3TaEBP4GqW6a_vgf3C7XNvCLQ6YTii_xSrUvfnEhT8hW2OzcnVoWOfGwjpaCRri5oPL36G8ODvD6BRTGJ38hxHSdgKyimtNbCq07aIQDHTdAa1zMaEV5Mq6KiIuHjGpJNRK7jEtXdSI1lhC0vPnTB.ffNdIMEGfqG4HyX0QnwyqXe.o1tLksUSnyJQFR1sGoiqGKSqa9FXAOx6M4FXMiM4UkbGphbcq87MOgUmv3XKmw2o0agbN2c5MfPWrRLMFq7oIBa2akeVFrSLolqfA_d4XJHv0uAHmoMdVmImUQlluyH9.97g37XWLSribJF_pcQ9gJ3D.zggWUGLIRwQXMtLLAAxdeAFJUoZWd.UheJA6skGxOhhffumM8TCr_r7RbWWnFGSw78KkR35asFdDz.pQ6nDlmVKww.ebGBjYgw2I5tu2uzJItlFZRk3P_Xyd9ZAVwhXwzMaLDqElaTRoA_wqCzGydSJ5F0phhmGWcyexESVBAUgN3LfASw3zC9tgeN6i_d4QtZoji1oZtiPJrrqAXJ2PtrXkZMeCy7balX1laIW_sAmUT68hIcbs3IwEpxQTZvUtBxnINx0x4nW.AdZSX8XKBwIJ10qD3dgy3d5Z1Iakn.btSsr48N9yRLWtlXeDv7xX3zBT7hmfN7IR.zQqzVBAGqqAsiYlzLlRlAifsNqlSguSYXgnOTZZ8fMe0cWn5sBBC415wS0waqoGDxk7opVkiY6OnL1x7Z52Q7xJtgz56d9r5E6tSgxdbZkymetRIS7wdI0q.G7ebVvXhmdd0Grqn5YKuKkfFE8HbhsFt5g8ZbhlVLQrscX2XEa3pGDI6Ozb3J.SNH4FHK8b1HGV8J.IoJYkst8Etc1olKKHv2zklc5T80ANzd5b4EFI3Go_Xqit48k4V8hoadO9bflJVDq57rsubbxlaoApfEcLgjOIGMskkZtmOW5d7pq7kGE0GbsC2ArVzvsmjuie0xWQooyLywuii3HWxrhLJTL3nWGQBorkkiPCrKs.DK6iS.j6_mtyTDKOgiQHuK0vBFKNMP0E96MEbpZ3kF0WbmX8QChwyLkOm1OUVC4Xf6SDTtOWYzVnzmsU.aN6LrQJ2XJC021RTbJFeaSJih6bZFoudh7lenDp8rPhpWvstEs784er_LgtG.k_He5IOUgPusXZCC5olsmOWZLj_L0KkB55w7nnyniE3kgZqwjfqwsCefuAcUQLnjRt8haiqFQyG9nqYKuAt7wQ_ywOd9pH2W56lptiiHeg4w.xKGzHzch2fj9SFG8auR.vLsfYy3hutBZNwXBfS2K3j43.uWtLXcHJkRv8qoncjjshMMOuHI_XdSSNQzXCTejFp6jka5ovkYLz97JyKZPYQGVVCEM0vn3vIJJb3PmSKIBxhqwp20oters1pVBAcEKlBCGPxaweOAJfBkrCLjx8_D.dXKQa73azjxqqtl0AzyDfnfTMNyT5C9LTVnh2sl3UQ.N3N0t0x4bt2mOjlghvpEU7dyTlUEWA3koLkkH2ZUDLeLDLaTU3UoHtseeBpdj3dnKxFUgQmVHoUeygZSDGeNn0LbmqnmdBax0pINT9tjX1EIRUsmg_g9cXfdtkUmLFDZZ_75pQXaHMqC5z2..vs1OzI498DdCSKjM6B5Cra_EnB4SFrkdj3NyBA.GYePo3hHXov4rO_dRaFInQfsyYXspEJHdgZqd1KTNcoz5A9qpQJnmhzhXouvhCS0BAj2YRG5uYJWnykGIIaavSC8SFP9kYt8DG9Bm0Vbs88tQfU9WJinXIJ_3_8oJIAS1qkxLWYg1gDK02j9Mhig11x3R6tqVapSaFBqz33c9aJ.L5ryt_ObEPpILOrjF2LuC3gLtsP_Wi7uiERkkNr1qaFTIU6cPd3dX2SMyOXcILFppAP7Xr2FusON1BtjLxhH_rzNWCkM5D5nySmet.008xz3_WQC03kPDn0RXN9R1SLZpTL54V6tuFnl.RO9TC_b0mVR28AJP5zeENG8_qSNarPZaQi9NGHCwbxx2ThAuz8x5R8XBKxF9JDkv_pwVjuassI.pabRsQnWFSveFyn4XPMlRBECJldpBeGdC6FyzuPZzdcyNbgRGe9tGZPdf5.HYLGLJttxb50pLtQZLONsf6bcey94WbzjmRDP9eQaTAmZ5SYEYm0P4Q",mdrd: "cA6r2bWHksVeAakoUWeoGy0Mq4rM1_9BUWbMvCfdNkM-1739243721-1.2.1.1-hl06DaNZQrnMe5p0MbIojQeIhS2nqVpfS1DfDmODodqW86._TqGZloR_tTBjRxTorc365V.avzci0KujH2qjpwFOXhb70S2z3pZdC3D.WDG2KfZz9ce3Lp2yVMQhgDXYGjCSDThKWLZFhVEEHdnkluvgAei_xNVXh5i13dEGR8TbupRVLftLg.QECFwUxl830mXR3tTM3gHNLRlCk97.oxEnHZ6SV8JyB7Zpdxz7qrU2aFGC9Mv3tgrZN99vwjkDa0y.XFLGk1JvJcKjLrZqvEvMJjoViMYFdcDZ8I_mPJF.ybCkF11kH1BM9bPNOJUzwtAZx67FzBBJ9jUhRe4diarCCDd2BZSdYiWUNQP0nxyK9IfFgovcHnPNsYfTHXecnzXlDSoOTii.ji0lfGIBr8SO4ynVZ5w95iq2cYqTseARi8A_uIMh4_pzgSnOjQNhzPRZkQAhZ_6CIaOuh9GyCYskDU.asIqEYTvHDMvTb2iVPg9YnyRcNdMmyi2NuFIeRLEZfdRQeHvSjPH1dHWWG6kQHE1co4j7FC_jVTM5M2ZjRuQYaPI9kALHCzZNJ37XdFgWo4jJlhdY36FI2fEM5Npe3jddCbccQu1YszV.3JI6oBUMWVokY1lmyd9haiehQpPhK.9z8NnJsEnv7ceA0ic25stHCKLOV_UZdbaNCY5kPI.P6YxRwVayERZKFNInU7LNDKmL70kJB7IV9.FJW.rXGAT_Xa7D97pvXL7eYm540tmIQbjM.fdAp3MNvuLbu0uArBJX2VUI5o9utCy9bcOYoROorAUdCEwcjbt1O7IBftwBjkeOxoBP5cj2T4VWnYnq1xFItieiSkKJmCSClPekODwwr987S4nqRkEpfXUvHvNLa_JA_1kd.7amzw9HWgc_hOieSolk2l6dfoaJL8N5dlJrDoo8Fc2_QNVOpqMKt.TI_SLvkLQKjiKQM3XwCB4dbi0zNfEBy4gfCa6WmFwqLUdpEiFEPzOkAmG5SDhRGyXS.a.vYn8EBv1Stthv2Ovuc6LNEBBsaj50U0vfz.fX6mcaN8e4mkSZcN.NCBOmnj7tl5eFyC6C6XP.il.pWlzxvqgsQu_aFXeG3d1A5_JznTgBRPI8ke7bKH200FksNrM2T1zeVmPWGotEbpHjF6Hub2Rm_IZw_4r1hsMXZMdGDnxJSHEFFejRkwYqu7lrqwxsq6npMbUpLPzzcGJ.D_r2eSM6S2BuvNhSL.Q.JHb6v8yzo3.CjWhNWNhLJCRladpt5cd5ty.8m2zoEjDIEFBe7VuBswF7PCvd2KDVPcGb6lVrckzCMi1BdIc.4EnqHBNtXX2jGc.G8OHTmUU1nImm4fvnrFWzHv5ReLHtcIN.z1QH36jS1yhwGxfUt36iMXEVzHR4gJjJjfMtr1I6oJCV.t3Jm9RBnnA5YqHYxrk1glZyoR3XAKPCEy7DnVAROFHobhMrTErLDDsvTvydYABGEXFw2sYffkwug45A7zH_IAQR3e_UA5Q1NSpVO0Kam3pUPfzz0fdo2YezSQwnz6lDN9qxSOuSJysaTuNCbGi.9C34Aj6Fz8vIq3O7bwHyZDIC80I_io9LJ8GPTX6r9720iYNDU0drrgWYk4CnusUEjq44VKL0fmiDC8ffI3KcXcZTZuZMAULDowINQQa.NpkZMvdY50gf9y3G7EaPAZ4R7BA9HNCqxeEkIvdNw3wh6hEEL0uue.M9z_KBeiI0NPLqb26.ngzaUD8fkmjkVn0HPP_OrAQYS_peF5DT4bpxEgM5Q2w3.NT9YelSsrj1aDHCYL.FFbY20l2r.T3c28GkoJnn.6ONwCJRCZV0mibZuT3TbGL6xvfK9MZ5JV87"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91012c8b9c61ff06';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\/3247506819?__cf_chl_rt_tk=2pDEKU1MUMXSvUYpZp7.bcUHOS6IdQcyhqndZzfBG5w-1739243721-1.0.1.1-XDD4Igb.C8OdAPfpJf.f9rZ7g1hyKbSM9vJCdgj.PJ8" + 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