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-1368725049-gov.caltech-edu.pp.ua/post/1368725049

  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-1368725049-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90feb17e8e0cfefa',cH: 'JpAgOYIkJCZjnyBRy6DlXgA.8IP.897u6LGc5Wu4yrw-1739217709-1.2.1.1-14DPHNpyjeGxv1gx941mMMMN5iFXzq8o2Qen7BffPrvBkkaTvbh8pAkA6caO88WM',cUPMDTk: "\/post\/1368725049?__cf_chl_tk=jReEzj23v5jEPeJiW8kTdbhPwOqwWade2oj9iOI2NUQ-1739217709-1.0.1.1-dN5d4og026kF5Qz4MmpWNq6jB7Uh9f4xNiEcmGLFuqc",cFPWv: 'g',cITimeS: '1739217709',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/1368725049?__cf_chl_f_tk=jReEzj23v5jEPeJiW8kTdbhPwOqwWade2oj9iOI2NUQ-1739217709-1.0.1.1-dN5d4og026kF5Qz4MmpWNq6jB7Uh9f4xNiEcmGLFuqc",md: "SNQuhadhbH5UpS_DqRZLQB3dvxmK77zGX9p8AgyKG6g-1739217709-1.2.1.1-P6.ZstkUbj_n72i_ix4bDT5YVgYtgUmTZ.JAEwmVefY9BAExcJmnPN82hhyUo3DO25vphjeTZUhNDMH_K_FMpV7gLwgaF9w6jEk8CXJK3zYwXpqXimmrQZekTz0vFvfIvQUo4xqiu9j1gIZE3IN7XXI_6scUV5cZLUL_Vu9F82Ra2s3pw8nRAglDfy8Lwf.laIvdbkPXB03Oe9pw9Iz3ib4TWSK5xWxminjkgmgMGP8PWrdNDSgYfXpaph2Ji.lIHPiKIioJcZTQgbsDAckshMF4dFzU7AzS4vOjY9K5tTKtAy.teWQcrQNa9cb3tZpbGyRWlgbyiJerkFCJar30uAEkOSjWWl_guJqu8MYVZEWWqx2OKMWS9wKi.0MnP4S7Gqt.SkEMHCtfaqTB33XNPCj20TXdO6G9qwrlOSbqPqUztbDwBQfY2kHvj52J0ci8cSAqT7BX2TfCKPBwc5thE.AbYGygcN3cPxN5GS70Ztt2UtziAuPRiC8x_7hbiMRNpw_BJLrBrrBSfbRkEDVNKDrh6SQd2RY0iWnsYmkM1LZ3ERFdwGWkhIhAO4XUDdOwR9G22DS1ys.1qQBbn08Bf549KQ2orC_yuC5P7KcyLLpksvV7Dq1ZuCHnfJMVu9cmCKh70JFykz17AR4vEEl_v9cp09_.YNyJHHmHTdm2LddqJRMJIQC_HBMRc8Xqh7SlHWvoFRQ6F3OwP.iEjpQ0pwWAmq9T71dLCWyqsCDTaMc.A5PSMfHkEoPRsDkJwyZwh05cnbG6sTM9uwn8mrBOwiRgw9UaLhPqQjvtdA7KKkC8ztKXm0skT0rXJkkHKJCoZ1l65WildNyM0JSneVd8_Sd9QE781Rr5UBXh48drPdV_Q6jLiPhRkJflqEl4y.mUifRSionTKxwWSHfwHlR5Wrr4l5141MqDhcWRoTdH3MFJMbpW6EkPxQIiBLmeHiy5mDqK5E3PHLYbvAD5LIK5S3KHhpQS6YbfBTj5NMeh91tGhlvL6uFGRMzhgrj7t6YU7PkJqgTsUVTtrHCHPZRFGTLmtkLV7ktxDbnXUb2BgBLvTY65iD4DWFQNV3kiXhxudIDqmGH47PG7Ex7n0hp0f7PmzrdCtN28OS5YONkRk_3u62lwXns.CSGHcRIyZ.m2jOWdTFUaauvqeiwSqtK0R7XRvszFE5bgqY.OKD140r6VnaVM6YE5CQvn7owCbK_H94jzYykIVC.fU_03S.oFEPeAB6zEwfH6Ak6C5_qoezT5Y_IScdBLuyZuZUmyfPOvO_vCPOvI29AUWQxNXzA8bdbqemUt1xEORMvvQQ77bkduAL8ZVfPlDXamli6ziDRyGYOHpSrRfLewKuaZnIzr3j1YN0TdAiOvSUz1EKtb72Urahb4AcWgnpAnHM_8yPck.R.zUX_tncdApO4M11rbdNiBq8RgkuHJg.47.iU4JX.sd_wh0x2Q4zh1miluQcGbzFTPVk.8SX180Ez7XMFQuJLw753Vs9pOLFbWx7CZiDk6.iaR4oEhsgJNtsEdPDx.jAjbSt2GCFZ.RlfX.nfw.joRYAGzJxdt1j0LM6NIYKviJccd51jalwQEWRUE8hYqfIEmnbTNW3NShadd5GP1fONt5KCYBKJIq3iYusJnExeEdZC1vHCIvVO2aS0Op2ogaUQrHfOfq4esSoFPftK0su.K.uUC_i6E9Sm1wjQbA_JqqZkyqMSrordD3rWUOLvrpZfXftyOUWe4Oi9yzstUCb94gpQl4Vh5Efe9Tx2wQUJKLXkKjoqVy0405qatjI5N224mGzFCT7oohRJWaLt07bZGJ5USEwIGQD1ptgjMZHovFJQYPo_VGDoxl0hYIgRdjAwqeUMfpXPnaPOInrMlkkQkdlUVztIDiYFkHNGPEArv4nIRfV3UyRd088TgoPgkKp8UvUKjojgo.Ol_tj1ZoPCs9g6vaW9_8y91Evi3SeMcpFV_Mtfif6lU8JsWp8_V7e4ew6lvjlc.GslTRwlq30BqIAl6ybKBVQ3oXojvqrS_ngZMzQcgPwCYaSlAx8qAP7jZN8xFsb47sxALpDgjsKw2qIrxMG7VHIKFuSHSZlnZAq7AgvcoOH_AHkMru3dE6a0EbuPoRgG0IkyDmKRd5.mGGP6Ks290fsQ7bQBUlio8QHxcbVcPPFUoqDam2rwcRlZwp9NiXq_IBuNe_udo3jb_9.b7ghOq60F.QIPq1HfgnL4U9DA0T1NWP3qAouemldRZtl9l7FgVtDu9Afx7pg",mdrd: "Z8Kvn8SJvL_9kQoOnQFnvU5QmcII78c7en5swpgux1c-1739217709-1.2.1.1-pbvEw7E1wxpyPwL0wEe5sf7WugoqQjdmKmRnB.Uhr5FQ8im9qo_tdt.N5HNeGiRIMAVZiOY0ViVSwFr8txbelfvP.9FOHggBTwizSZUqTkY89dTwtbaZD74gEy77Hrr6h9voU531pa3quKtyQ_cnvPQ.VySYKgWG1OnYkqwyI3mlRKku2zYgjwi3k4Zl2iwYKXEGGwyU8bwx13KFpeEGriyDhMjXQutP4dMCQ_c_1lH71PlIvNmda8LnCM3f6dn.XeC6QMLYR1qdv.Sx9xLWiq7lLJ9v1Icf7qV298ZZ.K9pGQQwmoIozDPuSWZmt1owcBTf7rbXnJ7w5CtzordoshJDVFBz2LEbKshNSNq8m5kXLfw6w_zEfomLx0s7uvQHup9kYidTE0b58zcifd7KAP4V9yTaJZ.iYViaFjlUEOvYo.wunkuV8mUb38qXdTHX8TX5VQ5ZfG9SSV3MYlZkqGCb3sDR9a8VOPnfnHxdYPqwW72mhupj85_OWkay5evS2ezxarJqWJ08zILVmsSSvJnawWTWD_eIjO1fFmyBbwuThuVn5PPThCMgs00jPKPRt7IZ7S8Ulv_MDERV.tj8OdhpxqnQEz0J3I9BDPzEJkV4IYBifToG.B35GnCnqbyvcfnh0wSW9PxAKt4Ns1ZQofgud9FWhihQzoN6YvNvga1SHGTdYmFpMX_La8Vd.K8RKRd4gSo0n76owG60Bt4RuBP8p_1tKjD22ok7sZDPW4K85WizwcvUr5Dt4tkD39oFzzq9KXFJaCgdhOG33h.stn8YVNN..OUu4OIfavAILYoYlCyqDG0CV4TIeMREChtIo.7d8b4zNgKeEf6wpkSYWFuHjHtXMAWVLbmquP_sE99UloPEAJUAmZMZcKvos_tWxPPNZed8xzn0ujHDb1dspg4vczMOgTkeGau3jFINL_J_H70euvjLD5jxwFI6CpgwCsP7mmqqUw0BJBrw7E1wxVZuPG6pslxf8WYU2jTWDErNajCzY6iZbJ.357M8A0bov8fCVg4rVabslbDxTOyb3SnVzN3CWBX38nd3p7i9yKkWoDfitWVAmqABzn4ImZeALKtx3DPDWwMjMj1A2PvwABxYZi_6DxYj0FLcvy3lSLH9DbUjmXVq.FARwpkxbsUjYpHE1lfAFnQ2kXm9caSDx8YsjMktn5iYJ1HoDS.FxCyEFCPESFVABn8naGFRxcw7XKm4GGBh8qWdNkZze4VCoSRbG_Z19M3OWKEblxivofiPzbQHHQDzTrMp_bthM3n1472EDc8ycYjVC4kdnEjQz1j60nqEo.RqAaV6j5rbdtSkVE.6o5dTssN1KHDy793C_qbSIs8DR8Yg01256PsAqLtl34RIIv.KnWlvjUbr6Kz5Avx8gqLbDoMh4giixtrkR5MXymX8BbF7uILUCnQfzvmeZQfU2petyJ4BITI6RWI9CEEV2TITFRAKT2bX0WNA8syGNHO4AaRPV.28MB40CAVbaeuJU8DmuQUtafSwVl8Cih7_z1RMVyZR2v9GwnIttfGj5rKtrQDfJSZ9y14Xx_1XZfdthu88OX1PRs7VMo5s5eRpUOtH8gU9si5EllNSgKBThyPj8g0W7C_v0Re3h8Alt0mzz6WAF5i0tOeHBqIZ1OY3Xh5jGzso0Kz4zNA.oAGOmNDgPr7NPmLEhKOH8Pk8Ocvft8Vo7mL3HsY39ULy_SaBv2676.TCgSSZzgNnHsQPBbaI1xNE6R3o6iuYt3inNGdm2sGUE0shRwbNscO3ZN9nOPUdSoB1wrmwiV..1aAYB0gdQDk463vKEYFmER_w0u2vb1v9VvxJLeqjNLss8gKmPdHldGNigQ6K1oYv"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90feb17e8e0cfefa';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\/1368725049?__cf_chl_rt_tk=jReEzj23v5jEPeJiW8kTdbhPwOqwWade2oj9iOI2NUQ-1739217709-1.0.1.1-dN5d4og026kF5Qz4MmpWNq6jB7Uh9f4xNiEcmGLFuqc" + 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