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-6213958407-gov.caltech-edu.pp.ua/post/6213958407

  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,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);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-6213958407-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe8328bcf0ef61',cH: 'ZS9OQr5A9vWfQ0WnqGFg8LdcdWNTt6XHpPLIx56XZVo-1739215811-1.2.1.1-8voYosRqyvwc8_0BGS5uT.bSA1P954OnBl8KXDQcs_hChL3UQ7DCf4tKtEACRoLt',cUPMDTk: "\/post\/6213958407?__cf_chl_tk=x_hevwG2YJsdVL.N2UPBaDp.M61keSQ7KWU17ZyLJJM-1739215811-1.0.1.1-.wG6HTFYsfEgFlqFybd.uuQyvYukRPilualO.DGsHNY",cFPWv: 'g',cITimeS: '1739215811',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/6213958407?__cf_chl_f_tk=x_hevwG2YJsdVL.N2UPBaDp.M61keSQ7KWU17ZyLJJM-1739215811-1.0.1.1-.wG6HTFYsfEgFlqFybd.uuQyvYukRPilualO.DGsHNY",md: "6_4yCulCHF9q97VSLuSx4uskTDILh.fu7ueapYHO5X0-1739215811-1.2.1.1-7v5yg25_p3ZcZD1lMJV5fgo7LrKmvBL6SvWOcAlKvw50W8x7zqJ42rBPv2MIhKfe_ju9BaTOWpxQGUCE2ZihGNqo7KpWtMRz4xToMU7pypZS9Z1k7wBw9fawJm2qBFsDrYyrz.5Bt4scFcX0175Amx1QVQgKcSxEQJEDR2H5TOL0tSt98kWPBDNtN9elEq_0YG3szhIy2Ft7WHAUFTyE7A6n6dSWwQfnKnybesjaTFYuVyE3dAch4KQcy3Ntlvli5KPgK1kcwtE4EI0FVxAzQEdZo4DG_Sq9iU7sUtXqrUgVkqEO6HtnEuspYtCF1WV0dQR3Fgc2czTnkfcdwPkVVAThJDl0z3FJiwSoqkTnaX0CONRYkBZV3dxqD.K6rECNcDrmkkjUahiJ80R5SWHQpq9diBxZQgMVw6NrldHgzeXIb.Z24CUc48C90RmluAHYGcnQFZG23pc9l4Jh5Ff1P5p0JQi0om38AcTpPzPJ9A0PqQ2G5kfpUwlkeSI9fnw8iIqueSstODqvm_ZSgbDrGb3Y5otbkOFuO6ZQcPXYN9bAIJ8noS5jV7HZkI0JozMHr.9LmE.a9BXMiGJAFzusOG_clYXSwktJ9Jr8TtKyZ7aZzaHYQDVM.UqIbNeXKhQpB6WWP_6tc1HEyMd7_y7SbuzkEUUvSdpcDvPpG5zzIrdsz0J2iP2l.SdGBBjeb0Ks_teir3v8QYe6XKj__kZdtokOWx_9XwiMM2ABnb8.FNfAu3zATE1qkWGGLpk_UVVXmvnPJbMAzjRbE_n541fQjauGOiyn999QeFRiFuBRi9tvZG6_EQPMyRzj6vKqnJ4k6FPxqrzgc00jfbodw1C0azHcfdBKTajoIxdTDv_wW0XjOYD3AWqKhfURFQ.YwxBvoESy9n0H1UVXdRsFcf.KNOE2SgoYb4GCYRDc1JE05GIikFnGze5sdD3pca8PyoDqP5QsdLAOydM5vv9ZpB8vxyPx5PigsP0P2sSIj3R.iVhuXrFKiBuBkZ.a3Afra2m7NKox6_K7ITKNQAUsXImGGrTFv4Z699sgKpPdCmTyoB.iP9YQbMqnCujjqcn1WeD4alWUxFXWHFt0dMBITndZ9VYeOvS921xIvmIOHEaSfDb719f.YQQjIHhpE4H2W_JPyo70r_8pHzWNjXEa0FzXCQ8ng6hjbyv.AXYxKkgguTQokec0WoaPrOnDq4APbY__CA.4R4Ym7BnvBmuHXFotWhNGFoeGWKrVvxhq2Acitm7wO5W5WixM1xS8lbknkfKACOQadO7x4_adTaKJbBJ8nVMkgrwQajjPXXsS_IH65F_95KI3ItcX27sg7RnVEV68DfqokU_mE50fwpfU19fDOhztl7G5iTr1nuw0PrbzlKuREumsXIIz3ELq8LlXrq1h541yVL5aaN9gwtPDf1xR0H5aH8TK0fOxTaK_tkDLidj7oT6pWq.ccf4y8t_cRSpz8ytHa_QjJf0xSrAJWpy8oCad4tpgh7FiKoWjR4uiVmW8sJN4WLVQXPQUbkqiwjXJvwrw1ETm9O6JNJdbOdZbfHymMUqJdp0IdoLgpKZMScXfVb2cLfRc9mLi4MrRI2f_yuPLZA.3_daecL_K_Z7B2fTHThkbJ0uJV4zllnlwOMi.U0KFYW9xPrZOsyaPk5pkYBhOSprUUPReEd4oY18FFRKDYJPuXYWiOVlruB86Yr1PWja3HMB_O1Gn_W8OEogeLn61FuVOTh3T6MzRElp3Q6XNc4ziOcQ0AUc1.xXNTNbRkvg_R4Dx9YxxfSXZWrMCELoMl930veTOlwiSn0bY7VpBw0Y.OSyuO1oYLhqEDwFqYnlfOu81qLWYbz4x76Hsn4beRnj8wDs8wzo3pwtTl2OVakgmxlo8K3c12DDlcyO7rXO3EXtnN9LB3I7hWemG0hov9BH.ZALi3dUf2I9xxfs4lLCgyGTr5.3mxX3BKbQKlbEHQ10r2ZcGHt_mq5qQQFbv6LDmmG_vNLXfO0T9bMD6.oLhMLWcp6j2mrf0oBlRNDFXLLDUFqUoYGKNOQp.MQsXt9VbZKoCmoa8sKs_W859u9eq3RjZew_a.MdqTZBXhsoqiTmgr_ojcOfaLfKqRYDUpTM51bTd0aK2BruW9u3t9nOHdRIn4j5vqoJYiTGKoozh5Z4eKtIHUX9ol5uT3nLQwD9YvVaTFxBmTer3RMfnZrFpCktE6A8SzV_ZR0gJVjpqCnmOL0tYXzpGqFQh_KtyyCttwvsHzfjmBE3Apg",mdrd: "z4lEX2vg16RNT5muHupRfpZmuyzD3JtsTpJCKHBy3Rg-1739215811-1.2.1.1-QT0Lh7GATvEar_6G1PZbeJefNwqTj_AasGuooRPt2xuTpAom4WPm_Cl4TbnuAE_NrGHrEJ.RK73ebrP1JsjWnI5Rf9v5gci_FS_n4yI1b_LCU0WO6w.39ELC6yYf1RyAnK4Z1jWaGQ_iUzm1mkiC1RMgWTVd70ckhYvXV04njL0qP_92N17WfAtqB.hKiGFTVyZUi9SNSQcV8PHcewGxmmo94FvEp86bchJdNOsYGaeh_wh.5rzC5maOp9lySJhte8tsgh6IlNor6PNF1vsobybKUinocHMvV1uF23bCmRZXNkMn79n9JQqN5Z4NvO0RthN7ChKUSXmW66RfukYGCBIg_xIE2p9lCXKwWm2Nf.tddaT1ele8bkk6tpAVHJLnCWbeYPh9TXMQvFgXS4m7_H6_GOzT0F99P6Pa0vtB1IUi8kicXypXOuhvfvt0sjJfuAjhqW6FyRZkZpYnwC1WQIf_n2e32MOLaeEg.Wg6lRoZaK2fNOc3xFivf6nlH3Tkm1t50zW07_cN2T217LEPqfuQD30_N1sg2Z6rIVYgYyewqlDx2hhlmfAuEMacYfo.3Oqufm1z3f0NJ2jAfyymqFZTpeMQmGLC7LMXvedNrqicG4wQ6CtyNjoyXwj3K9AuWVzaRT4EX1i4GI3Ytf2h1Nffw1hjVdexviyp4F_Gteo1KrjrZ_5iE6kymLvccWeVkxSPi9.8Lm1dXbTjXJMPXgYPfu2lM86a.hsYXX.ME6m89wQCHvHQmG8X3Hl4uGAb7H1ZK40ESaMKwqfsw_6un3Q8XFzdy1uhIm37K_1P0rzZoZWtGtGPsNuBBN6ck_AU_sX8z4yBtgYiDbKBqLMFiC8mcGLykhr_jlsHx67f4rn4UEHOBlFoLK3jMgQerCXDurLmETFyOQI5qsbe_csrFz5VK_5KznLJppVB11OqAm1ZZnVYobrsVZwe8tZyuaMsHv8F4S_b1h97NgsbEQdQJZvyORd2vm.lEcLfOQVTrgPSsZfLrKHSMX.KdmDVFnEss4qWl4EtNJHgTKRkTlfTvwAIFGJLs8GJT43nh0eo3VxVc5MLtb3JYa157ambYcXvnPOZyVT2k5hQON5vTVJKs0MmoxPPHG3_Oq_vOUIv3EDxNY5SZpmCDs5jWdW0Za_E2Pwa6QEp0IYK8.j9OOaXYnHDZTDz1Sc3rf4bahqHIYVXRmL9lTXHfB0gYxtIt.iFU2z9deOvq4WoX84I03tj6x7hKvmbOgOydSN85wq7wRc5gocsFmCSdHdBgnwel2fEp.RIGbANv.ou9JQIptwEheRIqCtiupeUrt79cdInHLQ_eBG8E4Nx.NrHNGGOssU0dvL9ZF37lj36957inzfBjrTl_fE.g.lqZqSN0jgtap34vlvo3Ib3pyGUGbBkvnkfcNTMZexJCfxCM1.xsq44jYiB3QtTcNcz2DGqYfrE3QXv8h2f8UbBbaoPoxW3RxH_zYr3KzIgSs6wUxQIPxuqgmQLCEm8ZKqwrUnp77GAh1DbpKGk6rFfBbsJtv7xj_6m9egKS4ITBBX43j3lsiX4VquUH3n7Ke5cuWp2vlehXSvgfRclDndcDdVRqpFwWYEIiK460VagBc8JT4sKELWn1Z2FUtX110JUum7YHjnM_gbINbOBK8DUSjYhzpC7RoHE0x6HYuWON2bGxp5OC.nRDUa0yoDcn4tO0R3dKStvrozE3USownKve3bYOA.cBUDbOG7EiTGMwa1.ZktvJn1s8YIMav0o.Ls6sh0g7YCktLzFhCa8emrNZ8DFEHwInK0E4o0KG_khGikk7Ug23rolojRwZzf7Ig9g3rw5JEc9RDs"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe8328bcf0ef61';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\/6213958407?__cf_chl_rt_tk=x_hevwG2YJsdVL.N2UPBaDp.M61keSQ7KWU17ZyLJJM-1739215811-1.0.1.1-.wG6HTFYsfEgFlqFybd.uuQyvYukRPilualO.DGsHNY" + 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