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-5784301296-gov.caltech-edu.pp.ua/post/993642575646

  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-5784301296-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe286dab44827a',cH: 'ykRea.1nduJDVzsBS11WCUskypI21i663BmiiZ5mtDk-1739212095-1.2.1.1-8hn4lp8p_Zfrxbzbtx2avATkAmUZZNj.AWnFqtdZWhu4rE95gWlyTPGh_ExK6yXk',cUPMDTk: "\/post\/993642575646?__cf_chl_tk=BfzzjG70z4FtQW7obAkT8Xqrfjs6PBjMD5PT13GkHHU-1739212095-1.0.1.1-paGM8HitBjDLJjxKApGS2w1jwD6WWo51sUh6LIepPU0",cFPWv: 'g',cITimeS: '1739212095',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/993642575646?__cf_chl_f_tk=BfzzjG70z4FtQW7obAkT8Xqrfjs6PBjMD5PT13GkHHU-1739212095-1.0.1.1-paGM8HitBjDLJjxKApGS2w1jwD6WWo51sUh6LIepPU0",md: "WUOAf3R0eLOCr4AHSt4GWf7lg9FMCg8pCsR6.zsdzW4-1739212095-1.2.1.1-pV6z.gp6ScDJ4y3fBhM4_LCzqOyXWuYaf_cywNirORn_qkwGk27lBZx7A2j7FkUEfr.SZsHh6JR5taNmQSsxLwTjfiULxnPcFvah94hLpHIL.g0cVn2CS34VHjqYUGgjMcsNSYqQOAtCJs1nMuePGPglFNMR.Z8WXWsLQXKdQ_kOcatsGQIRrGlkMPLDENr1GjtydUBJfHBpXLJ7oPNv6x1eXQEKIzv9Yj091FyIhzNR87A4N3RnBjO3d9n2szpdGV8bgWlncgZuq96rIX1khQAvvHrX2LmNi50J62t.eGx8RNCAjN3L7xckovWN3jdDgeODn8uHgiOkG468sg8JpLQ7CrBUtJodSbxkpJK8ALrE45xcD3u7aGePopX.UXkt5fQeZX6L.XEk6oOLdKoJB4Ad3ZksfcbL391GM_U_tG3_E1f.zKp9Y_n.wM1Yjlzj98gsJV_01zsYbzZhOjLXH7vqtxsY0on1hr_.xqyHy.BFkIvFscuK3Yy9ajJsaD4Lw8tkevg7iPMkUcKeXSKnCN1hCkM2ks0O.KDqF6_hGvD3ojG.dv_90cjGVRIDzJII77Lx7zjKUH5gMNbOMJ_OR17gigF9jOtBxWpEsrbQ1NqZPPvLLBwQYh3AsxZ.eNXmnqQ4g3sO1mYehUcoGOo_RZP9Dz0ZZ1ENJcOuOHTful.T3uz962hoXmqbmQQo8lAl_C5EBRERsTiGA7y2J2APhqpgxFwnJn2S12bw0_1FhI5xj3.N40MIazF8eITbJ6Xr4iQtXRrE69tsQRVbyLo_QaQY8AnI2npCabM3TpcW_R6AnufpnGiMOb654XekgQ5.JzIvtdY1u56yMLlfsHGLypK9qHb5PaiiATQMKkbbGbYepp.NOj0Ek3h9YloCYAjMLV858dT428IeY3KazhDacDw9MLFo71cfHez4nmw6sZ6EIjrqEJhlKtEaidGGBC2FF1i.rLoz0QeCjyvqRfrxcQbd4KI29F80PuuTs4T25KiAC.yf4GMSymOSTkzmGixDdaKPuP1dnSEZSqAFHG_mqHFK1PIB5UxLCdHvZaamE_VpuN89OZKZVSPG5hmEKWXwAFFr7hY_T_._QpDPOWhEtAK7CWyhlyQAA3.EwAsE0sDV2aovf31_WsYKp4no4wT8d0Clla8uvwU96F7gPECDlZz2xbSCOA8veG8sv4sZf7FED9UpwlVnPz2o1BIoi.zX_UiFYt4owxydgCe.kjjt2WEHZozJx_1Hu5.olaQprs279Wv0XVruLO5tWDbrE2oQecnVLzEucSHYv8HXk.maUSDOy5qpcV_ohc7thUYduskRLpQfNdRh7Re5zTLz2w7AxNpV3yHwDeqC2HtqMNJzbYC_nmYzLJTKbfQEqIBpovy2hIyVHjRJNbPqnVhYdGEWsJf3cElqOd2C.KUgKEbR0_DvxOgHSZutWCkrIE8HtY5u62nYLoMcZFSJTumYihLFN2g5IfEWcnUS0NQy6VNDH5shzLUs4UrKL6C7xem2t4gobg7RStR8W3wOhzK1d90E.TtAcsRmI1QLoEAJQBmReKF6p_woAB_1r6URpCL2xgG_f8K3lge8iEfC1qVUlMCte5QycCzU6Up0Y27VmpkwAxIJaQwcVkxjrgYEn07gzDFL4F044fbZqrjToQkuXYEbLcQSBTPt54rppTmDPSCjmDSvkL0txu1Ctdoyqu8OiF8uctrgS0g23Q3vqrA70EvteiC74gNcB2kwXuGATWSIvR3qK6bqteGFhcur2SQufQfTAb21LRjtpOI1LTkF21S70Lc9xcR1Ygn6fjxFj_4Tj696cUS3ceC0nPxvh5Au7jXzKkjc6.3mhaQhj2fUs3tGBaRsLaQNBCwvc_XolU0Egp2BZXez8VjmCe6ZwhuQIHiB4IY3FtE8dcQabFadMaMMOeyUBCNIzZhU31PjRcGX13VzUoYkoUB51riqSPPIOjl5lsAj_Dq.Gw27Dr8EcW_FFGD8FyFz7Of.q0.gqflmbro6kNbjDxmVwmBuBRRycvQ4LvL.t0jJ9EYJzETqejXN8FRMvX7VBG8c2Q7V6Gy.L9MdpmgTN5AoYNKC1Myw9D4yorkq3UY5stESDLd4QXcqwCPoVQOqR4LK5YV4MQfIXgQ_L_w7hqTIqsceXg_DQL8CbB1t0xjSZWVOSYDZ5r5R0DmxizKayS8aM9wXiriKDZIQGMcp17PKFGO2pnky8CqgDDZ7Ac4GzJ3Bk4OuaAuS0jngehoqETz3v7LtwW7t3w",mdrd: "h20fEKaG_iER1OenL2hO5ZT1sEW5ewcb50Wzb0RgWqw-1739212095-1.2.1.1-91TLcQC6vWdKcDYJunk4dygNPCZs_l05GNcAxReeGwI8fe_YYCdIuzqaT5gjKAOxgtZXnhtoimaINORVh8BaeyIl5SOHUWfTQLzOu5sVM4FYy4ItOxOFGyHONDOaoTfjXIcTisfWhTDQoV9.vK2EJ1l_AC5ZH3Y2dmcKl9012lv9r3i5soiry.DZ7hr2XvCWssQJfYqWB.TbaaDZ3oMjZKhfm230jFWKR7YWHb2_vS4U._2pmrpvpLacrTUWU8whyRHpFdj.ptTA_5s8bgBx9SU3iYYv0eAhnGJa5sGrQeMU0kSSpyq3JZdieXKUXcNu5gxdKXqAx1zOqxwGgzRWl4YEo8_oO.wkf5gpaYSqdfL45N5ZyjjTiGvNhdbuFm9Lc01Xrd.ljwoZCWnvCpRqK.1Om.LfT4cFhJFdo.yRALroZE2CKHqJGkSv4tRwqcqBa6ojMcUc7XgHFQK_AkgTOm3XAxjSV5zohBtINIR_gQlMkU1qFphVFXdASQEVv_61pabB9tradsWdH94OJTkUl5atn5ybgUWE4cQVlHeGWgixElorJakmKyriQ4nFzhZ0VHSqTRC.wdhC2Pfd5Mkr8HrPpaDEysJ05rLFeoNa.ZmRchBRnOUETyVAVwQsrszmweFeW6A0ey0CrYF_RcftPPGaChWpHMoD06JMdggSLRr7YTXbUVnz8Jh0SdQQVxleiq_YVU6JLPEmqiHz9hWM1aLERRwBJJIZtIJpt6OUJJqk_sko31TpiExRLoab0AhmmGLGlvy7u5Bheq321xSvHNKyLWIXy2qoUzYNJDL_M1lCFly4dxm1Lc9yXw_JqDXloy0HM5HpefEQjrNYdYmyZ7fn1wgBnZ942EXX21cm0QhhH8zYeD3M2WXII3yFTLU6hFSPVV1oeROoWvMENBFxFtoOObazYdG9AkQQBni4zqFrF3ua3c_Tzzs89lI7DtRiqWxt08sM4f.RIot0Uo2X2BiyqwKDRZ8NRT.8HlvDkXqqCtv5.O6YQ.N5M9x6VvEDf4WszKeWs0QVEqxDSgZ.SDreFvtBvHXuv6MFyjDtMD0kO63kSzL9nvyjyGhvbHcQYOzDQoyVNw6ueR9H0Jxww9843SKQfVKu7z6kU00GZXBss7kuu1nR.mmJQFqQUE_XU.WXl7xD44OzLCRImU8sxYoXA59QwZrzqDViqpLCGzUW1f_tVR9bW3lwfyaWuXRDs.kHOSP2NXrAfZivIW2HFKA_0ZaCUmASOjVWaAIqIhUAAzTmChFn3f_QIIlxFzRkdjDvzOja4H3KFfSkczaB1bqAoqHJXab3jqBYKNFqrs47bsAP.ET4pRh6IY4cvPGRqtCjA90iJg0diznzYFYtc9I5xYhcT9EnftQoNLZv4p_5ffcvrU6gTZu6QQDNrqg99bNXdn5qi9xobL0Vm_as9QQeS3Zwe4MnRgQmp_By6wQaWnJCHlw.By8YqFxuIY0bM9QX8AY7u5.ucF5QLylGJsAsY0ZxLD4CD7vtPZUlwnn3DkP9Wh88dNcjE5xvFQVZRG78QYdE.kCObNejkEPtiRIP7RX7P51ITVsrvwrn7T6ppVd1DmgFh1vWSuk7idbfaBaSYxtJNCs2KeNJMnf82E7XlJirGFndHF5USslZsL3k9QNwXuxfSp3QNecW5UqOugL7hxPh2KYMc8dgcp4wjw1jxL0vLSO6NUg4uvi0tppylI3VlawFi3PiF.Hm_qf79jcmf6wC4fQ3iC0Cb7825GBnktr9C7HI_.YXr9DZzOwVZR63AJZnqri9xJEigSEsqJ7tQyDx9nwGIjc4n3yx0Yl32FL5koOWVvMH6bvjCyc"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe286dab44827a';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\/993642575646?__cf_chl_rt_tk=BfzzjG70z4FtQW7obAkT8Xqrfjs6PBjMD5PT13GkHHU-1739212095-1.0.1.1-paGM8HitBjDLJjxKApGS2w1jwD6WWo51sUh6LIepPU0" + 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