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-4793286105-gov.caltech-edu.pp.ua/post/6197380542

  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-4793286105-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '91012d93adeee625',cH: 'gGCgOSXcDWYo0C5lHz9YFHsyguhFLcEs2EPEWqP6_RY-1739243763-1.2.1.1-ypYaZDkac4e_YtNpiMjU8viCimlV6zDuzWXxnnGtHAmqJAJifWBvYlRkZgc5ynuC',cUPMDTk: "\/post\/6197380542?__cf_chl_tk=b4l_pU6OBL2xpPQh5QF58UUY2OcjZ.HDEjRckjym4hU-1739243763-1.0.1.1-rj5MYb3OmbthU2S3p1xpw_hmfKsv.cOU93RNDOr3fxY",cFPWv: 'g',cITimeS: '1739243763',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/6197380542?__cf_chl_f_tk=b4l_pU6OBL2xpPQh5QF58UUY2OcjZ.HDEjRckjym4hU-1739243763-1.0.1.1-rj5MYb3OmbthU2S3p1xpw_hmfKsv.cOU93RNDOr3fxY",md: "yrmYgyw9ZVsQcWA2lsDA8VaNhEP0cIWwzBcEif0mY1c-1739243763-1.2.1.1-4fuTzjjB6h7LxIbG..xOiUOS_Q1SikS6h96aek1uxfHGmLhKf3uYTyJrigCD_axchFRENvLA8vEvAqbQYgKfxwkD6Z4xtFmJ0LIfirePBNFLB.9gUjBHASCQkJEuE70L44j96fTpLdWhV_xQ3zSP2N2BeNnLOEx_X7K62TAXJiwlD_BN1UPUG7e1Q2kBwqXwQNFvs_CXZV35LzMNjmQQqI9i.XMvtKgT49SFQH8PENcBVNEWXCCevDX_jsolzh7tE1IyKcqPgRG9jy7AtvT2RrT0EUGM2Qqo4cpBFm79damn1rxk4KFO.534j1x0K_eAS8GtvFfyVChD_ct6yozh8qaehTE066KdiX8gYPmSbdSI..TsfRPIGH33pAWUcotYxzwjmbdx_vcHRWqeszL4SpvKoak50Amp9pSivMOy.IMVEswjx.wImkdmO1fOGB3T5f3ZLxDUT5sXD9DR.7ODdgRF24t7ZBg48iooizMAjRl6XtlbAJqSMS1lzOg.Gu.Q6AJFvJoYiQOk6Sfw7GOYiX4kMg7nSZep6K_cqfJw8PSzn3HnFeEqXaP3HLG1Kgb0zBwePv20NMv4qH7R4_XqhhIH1ZP4x9Na1G7BR8c_T8.6ZNb8kNjRaKq4KQBofO0RlRERKn6MpJyIUq5sjy_oFrl22hquMYaGOkIamZOOkX12qg4EHG4Rfqm0bFPduQx8WfB0nfGKbDI1DYdylFq9AL6YSx7shOm1iYmGLjzAIkQzalsp_p6GRd5h5.Ucdxws94j1CvqSV.c4NjiRiFth0BnDOLBQjXlGfaB2yA1z6.YU3EjH2SnmNBUM_xusCv18EadUgOvUiyPKa4.qQDve1a3XcrNOrcllLir2zi4UGvPcK3myqhPUFmgIGOJclphomEf8TrnEoXk.Be1KcYH4paQ.eLWK3fmA8Z6GoASEBSnvH6LkmvVb45thR3uQMm3eqJtBRzcwkvbqhrqdbj7qeizkuf7gtBnaGxYXzrnX5qyV_gcFW9Hr.NijRwU0b3Vc4YmqnK6cwsJveURR6DphiG_NXNAZioZcbVA5Vafjacx_afpRoTieefSPgF7BBP4kYXZLB24wh0sktRZex9mpwlEr7OvDj75BXJCeFptGaTky5M5637Kpu.cF.maE2_FbZYjB8mk5N8asSsjyLV3In.LIdrNl3VCwIgajn3yZSLpQtmTpf5XN6_PacVUe4lQhZitfJD3sxepYZSg7fKWhrmi60v.o2W.V1Y4JV_2uBrf3_xKucsx8wwl4EbQlO5Wwd9s_bdMTm5v.H98FA4usPpEB6Ep4hp3nQrONbIMKC.JHsZpgVNQRc.pUic4ehulMtOe8nb.nP2aXDB_0RBtl8uhUnUDXCYGGrae4gS6DvuziZCVKhL2KHSZX24MFOIp9EOcqfLPbd9goF1Io1h0gOQpTNKCGetxYMQLnp_n01fc0NhM3.Usg057GwBIml6NKeIEDzKoHcRHhNIn6qHfejxDkHYwyASkvyHGrv3GUR1lsSMHC82FAfmZqH3_8ZylGNXZqCJXVrVsWnSm9A0jyuRXd0cK1f3GH5_mk9yL8pJg7Zk_z3qANdR7odyHpYn6qtz7r1wI16Dx3Y_lkj5EhiFCVTo4mF5br61rUq.0hWAK2MVMxH39Nj73LSc9s3syq0WZHPmYdPNQWKLl7c4J.mVaSfWByGDLT1elCLtIYQHPmA4sCXHrGVL8OHjhuRdwL6SFxuiUO4uDwpwZw3xNAK50u19stgIWt4tfhwySVkrj0Bx9tpqvjGnhXv5VHxxadbyXl36HBQ2BlpefyvFVUBSLdvGYc42DBAqWBOHRkqGbl3MY1uXrLa7QwaIJWZh4OA5rgpLC_Ie9xAk7bOgCkCtcjyGfe8lUgOGrQK.UOIScSX_jdkXVeqhrW4xHrNsUtOn8_ij9HlyltfakRj0MpflNDlaBU64pMadxzVKfrqUFqCPIvVD79iHMI7o_kIfhOlrMUHpbU5v6ocDnHeBYVCPcplCLbnVtThnjocaV4pHqEbbWqTQT4lGNsqy0IuYlRohdLIa_CKkY.Sl_c2G6f8YQ4qZRDDOBgeU9LGggf5WagTbagGfPE9TpddxjCNv8WKbmhvfSOpLf.1nXH.CI0rgrQFAOPDhulWNC_4P9BgsbjtMJE5fyVGBTPBB9zwkq4GNv.9p8os8bez1NjhCpzBNt5OP.fIuhiwSoP9rUO7DyulEPQYI_t5k1CWpeTAi4CtcWgeeN_wWeY9g.g52z2RQ",mdrd: "JxdGWCKDXlefBxHjbTxHp_nhmZq6jTNCM_aPLwcR8j4-1739243763-1.2.1.1-CeLdtx8JVBZi_K6kXRUz92S39dncJ1lWWjPTGGWqR0LDAZ4n2wLItc3jLC13eGxu0zKtK74RWJWLZUjIq3MHZlbjH05ZVFtDNr0kue3iXubW_A4tCVaoFwelGPChGrxUp9VJQC8uMkxSwe4Gjnd4K2SkQRhndSKCR34og9cg_yJ90Pp2VpfnbzniYFUiD1qjeq9sjDJ40hoalXBNqej3ci1RPRZv9AjYc09ABxzuaEVPTiWrTZkm_vCz9Yb2TPX7.9Tw89z.ghpyE7dhM1_dKQlzLjsQt.BGc128GuRQjOkp0UWjcG1e7ofPjZf1GeGgKp0cv.4K13qri6L2Y2BR80i.8z17xj1tbdOZjvHxx1rQhlGN6BVg9jS5hOvFemae2hkYi57Pjt03aQfT8BXjJH0Rnh0p0ecyrBtfuU0jjb9_SWE0sD1J3eAG5aC2X5hl31U5yJBrqtNcvcqwQGBlILxJjlNegHX_XzTO3u4MPYltpM7ctCnMSYqQLuCECk9SaAZk491WIIPFB.UZgjGn6WrMRdTAm9Ly39p031iJ1oXe2pH.Adia3heu91Er5PcyuPat6UOy2.zib8OY1Bs4dPuh8mnqDt_Vb1b0q74bOvNyWRs6PRzfKTu67QxPZz6wNxP48uNz3wqUISArXUAD4qKy8WKbGRUJa1UDMmKu3BqvChn5o62T6xq._5WvcoVhr.Q8wxDEN0DqrjT23AKN275al27SRHkBl9HOvUACcoYwjdh57mOj_icTCdVgvxJjy4WQtsXP.Fca2yKS8IoAOcGr7HR86CTqmFWDdObqBlALEzzn4hJJGNpJ3k1CyJ86.MEaJrSRg13G3PuEmXIAgm3Ro2bpqpBeH.rzRPICgHuKxJSlvIFp.SrbxFnTfOI5YSAAJN3y.YvcC45nHKtfHTCgtxm4_ZiMN9h5fIeg.3ZIpAwPYh0jr28_Td4Q22vY26bbwYszK8qF4N29RcrnXw5JSmk2EiMtGq_ZkPlbFHS5QB.XYe0e7Tg3DXGy4SomAzkk4pV3mViSR_I3N_BcQDeIbXOebI3XxsZprIhqahICzbHldYOGgGh01c_4FbnxlojGXPZDmP97xXpk5NRWOIJKZdv_6HGkDGPrgc7XuqnO.gEJ3WkldZh41EFiGH4XLjoj3cpDelrJjBD7JcnsItXyGTAfgaYQ5X6IgoKdnqoOgek_W_bzwxovbNMHTl0U4xnfgfR38i4F2_vGz80UMYFyWqYiZFfQ3BBAjHIECWUtUTluL.7htF8ALxk4OKzZD2VChxRpR4jOLw2jaauw6qCfmB2sPIWgaX78Ul9M4094PayNz2iY4QbfefPU7NJOkTsWr3eH3Yx5Ej1udv3E3LVokG_H4eANqYEXjdz3l.XMjfpnH8THhPnYbB2A.apQYz_cMyebcUhuuwIcrc.Pe2mNQzvC0toc4dk3BiuJXK0KI.aaSIVMKYLzzAE5CytqcnjzK0xkreDZqoh1NXVt7EI4zlZ4ja1Jei4GNsx5RS8dBBO7qwjMhpDbi9OYoKQy95Sr.8xiFWqaZnVY6NAzB8ikq6UbS7nCdhbWqbWd77nfLY_47QVclU3lakOynDlVFpZf2ozvaYJSwkdS0QoIlWO7Sb5ZPUTK1W2NXoOaReE.pQqUQ6B9TD_hpY_I8RHwauvLgbWBYtA8QHFaMWbKhavPvTxr1QFhXZ20S0skmQIpiytFG8SquFm6Fz_mlPCelVft2U2xJtq.wsiT5MiSrBgvU4ywGh.Qmr4pt.IqlV_pWgOpQPbwVw5PnMxFqIDdQGcKnDZMxKC0GYK9p8mdK3G1ZSQZyVmh5WavNDXj8FOIMRZmHk8mmv6MedT1CxIc"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91012d93adeee625';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\/6197380542?__cf_chl_rt_tk=b4l_pU6OBL2xpPQh5QF58UUY2OcjZ.HDEjRckjym4hU-1739243763-1.0.1.1-rj5MYb3OmbthU2S3p1xpw_hmfKsv.cOU93RNDOr3fxY" + 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