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-7321690485-gov.caltech-edu.pp.ua/post/561073501769

  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-7321690485-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fcdb7dfc80d678',cH: 'p8bkba59d_KTxg7EPa.a5MnF2jk.H8AKuDK_913xSRg-1739198458-1.2.1.1-a54o09lrOddCRnpRHVfpY7x.8VSgt6YeiJSAcJVNkcQExZDmjK7F8dITOw91vyLK',cUPMDTk: "\/post\/561073501769?__cf_chl_tk=stle6ltC_SXBzBHgopJ.sDsvWZlX7qkgyJnGf_YDEOM-1739198458-1.0.1.1-mR1gsqXqE3dN72So.XYzbcB2476AtVk9Y.HeitXCdCg",cFPWv: 'g',cITimeS: '1739198458',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/561073501769?__cf_chl_f_tk=stle6ltC_SXBzBHgopJ.sDsvWZlX7qkgyJnGf_YDEOM-1739198458-1.0.1.1-mR1gsqXqE3dN72So.XYzbcB2476AtVk9Y.HeitXCdCg",md: "nINyZkJcWF1aeGcssRxEp1oTjtqYawz1qrbPz_1uNUo-1739198458-1.2.1.1-y27nDY8CG0m4t6enUUA3GMmyfMbAad3ajZSZITCMKJSNtiDhwTWNbaS9LBAIv5gyaufam_VzrwiqAR9ACEhsOr7.P4MQ6V_oWXasCNFZbQ.e8n6jLm0ne30jWMuJwKUfdH1zI8oTpphbuDtPqhRI53_P5wLH_976jyvkZZNzdwSzOewqVljJom2mlV.hnukqbuzwwU1URJho__Gy_vKO5891c0w619YuQZOHWx4SWdjZmGo5QdxXfgtqIcZG.j.PWn.c0M6RZi4ENZYwfGkr8.vMmHoverh7ED3kXnUblGS35zLMhIseqB6pwPZBa6sI9ZeJrfvOUZA.Eq5LcVpnIbb.HskdGa_ytu8JY7kaNr3vk7Xs0tB7iKjK9.9BPktAZHHjh5VQ0e0vAH0H_JP.mIShk3em328IRyk4WMG6Oppt2LviI6VeDsBHhhIuhzERI7sYrmUhIr73rcBwPKHhK8q2cG.OXCwxb83Tz1YuFGMKkG21MS1ejaPftmXzZGUqtthsXMlV8KGDeDTfIevINq3EnMtE0XeB6hfjg.O5S2qS4Y9Te0I5HNgH89xz5ZFxalqhcvTkzQyGK3s4r8KmDZy0IIufSB5leiaueKEGxtAMShKwEZ9E7QwYM0BUDQkhdd8FhAphTJE7hfnHY8HVdNQt3MWVS1KjsPC_6vLQ4xEws4OOUVRYDdmOtaqf_hgcmKpH9VD1HYtBSxvQFUdtTmlOneZtIciIGp.UpthPrbWPIKl8IsmfVyL7Vg9fc6wxbl9NJtcBlatOPB2PqLeiLwxx8DaEWbld73OkK5d0Ii8qgTlUvlGetSl4rd0gr8kxls080vJ3eKh50awEGFtPTUlVqQz5k.P8wpTQ9AMUn_q209OV3SUqqbDvt1vyoW6DolUJhkhg4zUhAPVrB6TX.vUsNe29dj8K6iBiKJiGcwR8hjl5sm79U3rlwgrdeSoZzIvJ4UpDxSQ7rEOH2wEzk5ETU01yyPzXWcOUuSnkJeMvP3.lS_h8A01aJbc3ZpPdJV_cTLkfd6yvnzvBec.4sZ0dD_xohqgnaNDOB9ACI_ZVVuNj4mYc_tcNymgNz656t6iqSWC_JdUlrPsoQHXodcNPDwVBcUXTHnJ63EonqFmDa4N7GE11yzyM9fiFuBKkNd_I5xkSp6EUV34M2URVZpExaX07sR9Hz.xmot1zwOCSSKldLdFwszKmJVUSN5xE6Krq5UNPMDTJ8FF5Kc6JgeC79hRb_kXQnf1NooECVSXVuT8cJz6tCWRYeYXnpJwjgPhEEj9pe_YG8exiCSIkdSmYWCPUUReLWsLx2H8RnDnEnJwqzeMmfB9SsOwqKpVQGN376qLpFr5mNSrvGTCtq3wYkTHA6GXAA5dPHcxR3W7H49sZ_dpk2wBm0QMduaPRBiL18fmmW_hjCI0xGVDlXQMRA40rFpSJMynEkNO1Z2tk11gAv09jMceDgEUKgxg6lZWDvjXiFdl_Ri3mgu5hVnizOY6OFH.w83TfFY1a9i1i0_5hiHyMXC.7t3wQAIJONvkNHnNLvnV9J.nldeMAWimvXFnsdPYFgZc1K9nTTXJGX_qH1AJeHZcBE7zn6uHNBOBrQoN811tC69Vjr7yemCRHAOhcVIJNn6NDgr3VNCL9DpxnPJZlOD55jTZPrRCxx8JVuWxheOjBJcrKrM9pcmW1MLRyRXikhQKweZ1oelQ6R25sXpLSn0W1mAi2g7xZFoM5K4pxA7HIHrdH9fD8sbxEyjMzL1nJI7hFGothcSLY0g0h_uzxZoj21Rq7hIhOpkynqV17sTBLuO7BzcP_MmhebQp1qnMgECfaU_nzyzv64iFttr8m1bc6xWZMBDYX.NP1HbQ.QfMzTAVfgScZ5HtDHS7mltP7eMIelSsLffsvt10nPGqa0smE0.BjVgyWCz_IgrknQZKBLgG25HI.oo4rTCoSzAZmd6JuNyGdIabR0mpTqiWuXqejXMMeY1wSBIMNs_BM_0lzB7KAXm82Znmaz3HNXCGDK6u5TePEqifgIUxnPNfEhq4w9VfyBO1MeqDdzAraWcvz48YiDemkE.kl9p8LXHCl123O_yy21x4OEE1hh5Kk4zJwyp4jkZqJxIt3_pF8As1qqk2nu8_XPwhsQ8JSv.Yn5c_Hz25WK3c9MO20Z8N_pzC1j1Ej0SNg2hfc3QoU2Hznmf_ZVbrWBqrrEc1ZdMeejcHarM.UaSo0sGbRBiwPXmItgyBONpl5b3PEQJeBnvkVhcvbYl89LQ",mdrd: "1yDpWHTYfKs7d8ga5rkdh.a18__cBhfjvUl3vOziycQ-1739198458-1.2.1.1-fCI1NdsOnnYRPoQWYn0R0eZFXhKo.5uPy0fdwJafZ6xBQj7FeM2tHbUIgx7PjayFRw_wpjWzgT7LJtYrg96Vn1JKvbmj6mnkKH9_VOzBhZae5jhHjjWVXLYC.9yjlrD6symbBE3.PM3Hyzl62y4_5c63vG0HSDSa9BVD69GipR5L036.LNFyRBkWdgN.RVLwh54KEc8P5vAAEKivSJfwnm6NSNEQ_O.Qbn2y9Q.ZKS10GuHmtogbykmSP3DqHVF1BGCODdt_8HxFcg1Z5NJoXLyrmARzOx5YW.PhLTOwCc4Zq.LBPVr3lm9AoXHYOZf5EyVwxDEa5KieMorXEUZkUUci06.yiWaYx4vx12HJx3cnvSyEzeEtltgZFDQi0VNypp3r14zrwXaSyN9u1scDHOcpaHAu5UuEok4qO4hXay2xPp4HD8KAQfEbD6ORGmL3AAofpeSo2300porQli8iB11sjFnCHQH_aSdTeUvvVAbBsfDc91ht4df55xJg0yqqkLCYq8kjvMmM8C2hwPXt4z.Hqmlu0x_4WWxp756CMDRaRf_5Xly9TjXjFjYrKNzx8TfIn.vjd8exe9jAOo.eHKg.OAoY1UfYeIDOBY.A1Rv5FLF_SZPU03dyFz_DJ9.o5FYI0leH5iiqYjXdtnJT0dWKL2MwNwh4GzU25KTjJRxG8jr5oYNzrHm_ZQi5jtbAeA6VMg.OV1SSnBM5.ZCrQs6z1OcBQZ9KqTY7Jx6miFfHpFpk1dQBgmXQq760vBNw94UNEzB_4TQ8w7zu2asVTHBOwoUqMG.Rlifa8vLAOQPTpnEcsTV31qKrbHmxLFOfA_RX.yJ1n_I_I8aectQd_1SbSI9fCImXQOzSrnbkziUTUYqgd0SQwsX65c92LwuiKsa2Nh1AleNZGX8A69JcJU7l8dXrEnSCW4wQhZN8KODBcnYzybLVLCWFmZ41wtIPKPg7tbho7l8i3SN2VI6k8AJbWmjXi0Di5REZSgeX4ybrVRVTCxr0vN.qxpvvGprEWP8jEx7MwXQa0.JVgUBXzPN42Esy3Ow66pt0s4ityDKbr_D.G7jbMWWOo66lTyBGDMp._DcUMnu1EIZ0Vx8Sg8tQWKzvY4.RkVRRTkrfJ5rCYd4OQomD8Rbo2v1qiEhv0KvwF7a.wm2g9Ehi38tOiudaQ4T5xrX7xuHEvvPbnisdcGuY8UyralqowvrR_1FgpTRVQP_rnSsR5UKcCufFBNhlcOP1aYha2qT2z5nKGkeDVrGbo4zQ8_HL1E93A62k4uJfeXzJ5tX3xAi7B594ejvODYFX3JMAEfM7mtggZ3jyhENQJYwWbbXNCpH3p4QxckEWrdz2kKAUV9FRkbgpWzGUb7rEgmdL3x1IwTtJllhvNqx6zzXOKWbP.8eYRIyJOAH5UnlzUtc_rp3Zjbe9VtsUKlqVkPD3pAd5h__.Mf850JOyb6e44veYKGWWJEdEvRwms0mgMzeqcXcBxuIt3pA8.w_pvz8DoQnmbz0haa9BHpqFXrdtekB02MfCuJnKntgk0uZ0tw0FhtHSPPVSlaveDm9QDfU1JyiKDpE_lQrXpSqKouCHcJ6R7X817yV8xkpgSDpgMjtI6NHzIvavFuGYzS.gw5sPMTPfrK4ltM5Au0aMHJSWRs.6L31Tljquj9EZDcVJoiVnwjCYgNnAAVrQE_YhJ7i0n45ZxIshVAP2gNP7LXGMCKZchaq7S.ensjsfzrCxPAGqEZlM_eQb8wKGeu.o3xVEXeBWuDC8h3.isCwtif.y3r0XcidvLSV_tDkwq1.og83Jm29s9kgEm1WGUkz0R9fCVX51w1R4ukRPztCHpjcEqpitA11vgw6J"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fcdb7dfc80d678';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\/561073501769?__cf_chl_rt_tk=stle6ltC_SXBzBHgopJ.sDsvWZlX7qkgyJnGf_YDEOM-1739198458-1.0.1.1-mR1gsqXqE3dN72So.XYzbcB2476AtVk9Y.HeitXCdCg" + 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