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-0153294678-gov.caltech-edu.pp.ua/post/0153294678

  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-0153294678-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fd7c19faf2f282',cH: 'wEvurOEfpRV_R6WiKGCrhhhMw1PFWNrwn4znJdRLfOU-1739205037-1.2.1.1-BOchIQpntqIBjskxqBArdp.7bfASz0cRHV49_0Ju_iCMvbXZKH4g8qBeJI9Xqfit',cUPMDTk: "\/post\/0153294678?__cf_chl_tk=fTudXI5diAuggiv1L_mXto0y09wZR2LgzMuikuiMcJo-1739205037-1.0.1.1-xkcjg.lQicbjjhVG4rE75CsAm7p9nYF0hKtm5_KPWFM",cFPWv: 'g',cITimeS: '1739205037',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/0153294678?__cf_chl_f_tk=fTudXI5diAuggiv1L_mXto0y09wZR2LgzMuikuiMcJo-1739205037-1.0.1.1-xkcjg.lQicbjjhVG4rE75CsAm7p9nYF0hKtm5_KPWFM",md: "RANciW01SQtdERS0IbTsdct2lT7SrBeymnt0flU7X7g-1739205037-1.2.1.1-uMzoILNCCkRXhdTAyjDSn1EoLDvcu7wvJstiANQTom0yt5_Z.HlIrg49na3YOTT5gS75OjeZFvDfaBKf08SbT7fuELiWkI1.Jy70dCgFjXhQLJqmzv.yJHEm_1k8bJZ8cX9BwCYHqqGzOFG_1kQ_.aJtK8tAM5oliPrZwW7kIPBAgewjEFger2T43Uc7xNp1yM1__LITtGmeoskGs2Dvt6RwHZt83.VCTZzsZo7BJfyNn2UZrFrwAwnEOASG4oqIChoyxU8o3sk7Gyp_AvU9l6qXy1ShRgknYgkKlbXr5rrllPBxG1vF6DpQ1xpQy13nQ3UALPV4yqVzt1SfwXYOEedG_T9sDeJbQTTGLNHVtziYwKxdJ6WpZrf86mj5SlnkRze_FW1MQayZxdMxlL3trAM1JY3Cdan0Kjfb_Lt1Fd5EMfdnZCDa0Auuoa0wmPRVjpbyoAp93cuDMsXNgu50HW8pRTQDG0TZHBFCHwG2tV7LUDpDkF0ffIENnH10ntrROqpO6wC.GGwYITMOf.XEFn9ZIRHu2j3BjzXvk1_iDM24Wjy5xrkvXnIKxnxjUkQhuAeazA.2jG4IIuVRzcUZJlkZmCndCNYMZrxy21Bmk_Isvj_ahKejocyqnZwBLAXeCDWhUVqCFZtFgg_i01NMZHAYRywaygsT5Vnni3X1V3pUrG_Vr8F6NLk_9mo1jJ0YOoKMyF8VKFtJSXTHwIjJLLFXmNI5jSs3GohIwtvscooJ8lnCPkjgIEsD6sVqtFYn8Or42wkl3QXfBFlg15urmI.6EtXbNqcSfygtp9Um6I2aRgC3Hbtmb.vNI4DjCXFAR2hqJjAgxYVhvYWwzyGt0DArxrv4fC.d7E2_JK4GyP0.K3t5pxszzOw0N8nAdHW0PykIXgYZABHkj9b9JTZgISWzfTRRQYeyzj3JWUj01AvQ44KQvqicCzrSw1pozr3irmXELqcGcNyq7B1QpRm0vafeo8zMVLUDEF.bPR6qapDA5LY5UApzhyMrbPSbUwcc0SdeUGMS8bgGhFK54pVp12qqsQwNpWp4zANQaQDy0BrBzL12gaW6lzMjeY0t5lHiH1T6E1KpxY5jb7X6OJ8P6lPLLpLt5PIJBYGTVGfbeFEh2WkmPzj1Oe1OzXUuB0g9.8Ou3jiBnQE_bDPwig9zzwx1u7nm.48DzfeA4eAzAs7V0BwSb7NheucNO1SP81k2bxQl0.TfEoJ5jBiko2ILAvcPvgv5F5p6EbU4.GQP9ip_Li7nQ_D25iVj9D89PkLd3yuarXWSAW0X_iboMX2HkwIUGE1g4gKk8hMRByhkwOgEwIhRjbWjy5d_cH4_eX9iUj0o5j7uvcpKX360UO8R6ehDEQ9OUeUQxt6l7AyYu2N3BeK7grrvUy4qghEN3ZNP3fcXKTwVRQkpcBMdEOCJqgns9pmgdlkcD8b3tXRoBGJ8KwcBBdfkg5_tow6vzoriJQIq9kTaoqBptqWO36GWpY8mz6V5Rim5s2mLckOT.GeShxJ5kZO9dWO2TjU3A5kiNSkck_vkN5vlq7jfh_EkxKKfqhzgEWBXccU03XlbXPx0Gz8tnhXXLUxKcJ_jNXOok_aV9c3XQTocjFqQs8Z9In1a_z4MkzZsmpf_6gTXkkJBPzT0YifETHe4jAwHsukIYY0MBaey5oxBpqNSby4rcsqPPzQ989iuLt0ZQwGYybDjhJNVNrJ4Xn3Bscf9.ZOrn9NxjrBfmqwRMJ8TmGvYR3ABB79L1nVojtfMR5oPILEjZfGoq_sMsFPgOojKF1wyj73GHEvU9Jc4RqM1C_dY5FOmI7G73Xkmmn4oIIB5r899m7H6NkUSdGXe6IBWYqNO.LzIzjWl18qJc469Wl9L1VB9ag7ocT3.gCtsmTw_hW4PNln0xVUni1Lj92Kh6DERJpl0KXzLTUVL7670h_HsTIc2W.wmvTetwSVClI2xjb.IfJRSU7vdC29n5pMKYEjR_ThjUwY50MB6G4vWExgSNCCLzebjwEyXohH8j0pM65VVcu8Ap_fLSw0AWz.cb_ilZ_SSml6AcMpf.XJO6ZFsFxrIAHmd.XtpRGzyVdB25minE1GaPWr2La1x0oO__r_lY4evTl2O7yvNlgQvtDPwVdtp1mv1UYcPBcXVHLoQI9xnAvZoBHIFhy7ccM8KjVys4hYCLOGXsqGaUxX.AdVgb2FWSRgTsD7XeVOz5ThkhN2GOMeVrBGQo7skPjfvdbxQZ3xzPqEKD3zjByAX6rMpPw",mdrd: "3M4SVNRXxfcGGjXJvY4fkSBST82Oy6mJVpGpOdzvMRs-1739205037-1.2.1.1-_tGieO3hLJcP6HRswe8dpoRFNGVpouiz5VxmapQhw4gRQ3XL8rGAto6OclChITYa7HvfwAqU27Yv74nKUHDeTDWK92UWkKX5C6Rs78dqP17On2Xei3NAqodtow6_omOmV9cedpBAmLnJsrwMzsD9mqeTvzGI4NTP_2.biKZ0ua5Dnq3HlzTgYS8opJ6JbNOjFl7i96LmGaL9Fol.sbZIrqup7jvWqXwz4p.Mk1jpA1nNrQyIHbLmy5KAkuMLg.W2L2gfcj22KEM.VrphqBe.hIQupAOE6YHj.T_UOC7rJzf7RTsHGcZiG2Xqb0wCXHxrz1ChM1mXVbCfsExHiaOJ.ZWgRw6.LrezwhzsgzdZkw7qLcMX6160nlRw9n8cQTIi.xaH4lssevoP.qbR3BCr9VY4qwQ1BBdXybJiw2ccw8LlmGGaHoU0GJFagt690BKwtBKUpfZvOnrg3Tu0Ga4ZzZ_Gi2AKgIoBNSYkCWr5q_9ymFYEav0E9PIxuPX1Re55tOD3kQM.ttuwCQ9TZyYptCt84UoqX0zwlF824q5jkn5zxcjTZ5TcfYNkR_fpe14DacpbZ_zrnHmP3DAZ6.s3QDNZ0spRw8rYMelv1iTFrYo4PmpkUxftszhIUBXSDGNbHuBxfoHp0VDXJAK3eJdyQqi26t_uYiHtI64oVV5FWhvtW7.RiI8ZmnBjH9EqdbZs0X48AkrXKRJji7QC2oaI5Fz5.fXctd3O5IhZFbZMCAn1En9C1UDJhqysr3jh5DikM3mgrBNsfGWdyikdkx3tltX6B_sKiP3ydYlsCpb0pnOfBGm6n.aP5.GGszqkSOWUq1d7rjNG94ALUulxBgZiCyRS6JkEc15z7BWw_kAAXVOmhioUf1X.i7QqRHLi_gLfn4kyCZyifIE7olMxAHd.yB_l8RE9B7eU0eWQUu8o1Gz_TPq7j3CFr7lmyHRIGs94.HucBQWl1ZYulMygYLz39VD5yH4wmY7tH1PCVyl3pD6D51bfQPQHs2CWyCRaMvB1yrM1AcCmd22oXXF2.1Oz7HXz1r1RylOIZJVeZUS5Hc1CfYSzx6lzU3IT6J.SY8joLtdTNP.qtlHBrxz56AfVpw5jt7p0S0x6nEYkH7SX_0uR0Cz3oWAdyRowbYsEg2gFjXPDDCWKKsQqNnTIEUGAO0pTtqv3gIvgV4rnRgjtNHw4GJP9JJ3wR.azROiwjvVGuma9_1S_hdUnN9dXvJ4qSPErfNJ6m75lN5nI3hQNPjd_YMORDzCNwmrTlylaUlR6vM4wU3qzc3f0c0DZPKC9gCzPPxrMDWIZ9kD_t5PyFokQYcCAQaDlDeiP8zEaQqGaSXiVVbCMWnvxXkgxuueKByiS6Fow9TQOcJoMgPkyJkP17inDKHoKL1qOGppn5grn28nl4P2WPwPT8PZPY4XzFNutdXkW.ndRW0jUMZ1MofIFPPzRXnzkHKPbfXfNr135m6YsHKkJTLIxFG9NWLX17VlIl3WqAwKAEUTCWIiCXKcTLVVjqFZuKrPYCzYTd3rUuqgYkOVwEeplOKfNinsd2k.EomIBtIs_9hwk8ZR.tTAXt9TCsr81ih054KX96mHU3ThBUUzu.9WiUwLiK1dltzED8O0b4VQ6EEin292BzuwMNWGyAlTvcyVaGq.ruxWsdZ0Zz99wm6LSe55SDytusgy8bBX_YmdVN_2RsScICkxMljbwPzczZyl_CXY2z354duoQaHI0Pftk_Z5beDPRyX2C_8MH7s2Zg6dYttlz9aczNGHuPTI8OHgJAkt4UEjGqfuFX_IZynZ7_pr7I.abhzJRtiKItMASx2ThHJhojMc"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fd7c19faf2f282';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\/0153294678?__cf_chl_rt_tk=fTudXI5diAuggiv1L_mXto0y09wZR2LgzMuikuiMcJo-1739205037-1.0.1.1-xkcjg.lQicbjjhVG4rE75CsAm7p9nYF0hKtm5_KPWFM" + 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