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-5691837240-gov.caltech-edu.pp.ua/post/710455485523

  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-5691837240-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100e5a2eb833adb',cH: 'ACJO9pB9.1TNam_xFs_TWOnP1bA65Mw5e0qQkZPC.NA-1739240817-1.2.1.1-0AaYmsLX0GgZmehZb5B6ka43Et3uwGYVtnWlURtPhL0B8oDSDifdnE5hLgSg43I1',cUPMDTk: "\/post\/710455485523?__cf_chl_tk=44eItzMJ6U43VLz0iweBEOv04tHJOrzYr2tmvOiZTwA-1739240817-1.0.1.1-33ZcgbrkXGaZlmN0iac1S6PUkqktnGReEiGn4r7VIGc",cFPWv: 'g',cITimeS: '1739240817',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/710455485523?__cf_chl_f_tk=44eItzMJ6U43VLz0iweBEOv04tHJOrzYr2tmvOiZTwA-1739240817-1.0.1.1-33ZcgbrkXGaZlmN0iac1S6PUkqktnGReEiGn4r7VIGc",md: "3.bk8MfXRy.xYx2QoZjxS.FouBhhnxs.ReHsvBiecFo-1739240817-1.2.1.1-9gTaK8oGtDCOWYE7vu0TtXykC2._wCFcWFnremgIWIfSKV1ZxU1qFGvBig_wj7rg1B6ejTCGQk.R21NSsN_6bZHTLmT6gJF_1wTydRvTcWrYGHNDjIZiRimkUPjM9qgpzH0EeVMyXUmDtqJsUa_MXjvg88YypYzZ40Z.L1ZEE5ykaSb53AuiY4_ZUuH2jzzfJuS6sBPnUAXF8FQZO7sY9pfAAx3KBsTUyC9a8XhDbm.SbbJ_KGNk9R1SPYs8sj4X9w5Z88zN7aA9T2hs1C70xydg4lQ3qMxZWa8vzEhxvH3Iibfk3FpB7blfChWJbnJ3R2Cif29KkN.JmtaF1MamU6mkqZ6PnKJ764at_Y47uFDdvv4BM.zh.JooBCweUelMTqEcCfT5VoAvtnlV.SDhKEDCreUG0v7UjcqoBOAEN1RcyHOOdjuz7e7dWTh8N7Rw23drABxYsZ1k82lmGexDUteA8GT_am.77cL9cezfAkY01y.vvQ3hN9qfwohYQIpafSIHWM9b5BZmChoHPxWRl8KB4B80TOQ5BKv2BcSOqF3AbdwsplZb0Hb5Hf1IH3Yi332FGT4V6Cwi7QMhF4zG1_mOxq.2a_0KfFeaBkCcfwDtVCYSPuDWveLcVH2IE268wDEkKbo9hgd.kIz_i6V4PwJ5AhStfwdEMdL.1iqP6VT9cMm3AeJ01sOhmEcX7sI9y3y6bl3WBJ4.W04dx.dtQDsHSYbK1XT_ug2rDBdl5TxmZ3RBPksYTUaDZMLmZwE_VuM.96TmBTDJxaptE0_HN7AmcueTMhV5iafhUptLMpl5IbWmp9hBaPfJgIxT84.wvZAQB58YKQjnxYYJazG5ZwtPaW23cBDsCAwpgjSbKE3jMpZl8z4DZAqV_mYTR_yC0HfSAZGi2VTpocoq66QkLS2irvDZmGNmB_qhlUZHpFy77KxHcN8OGFeEmMtL2XU2cSUEpVo3yVk6_m62jb58rC4EqXBJOW0S6KD_4bmqu4Yo.54oO22qlJ8Ei.MSXZTdJCBOq22EQ3vE7bPlJOQfLqwsPmk59KUWAvGjM6Og7pbEs6l4dwdzrcSBGCQ4qRwg.aTyl2QYq7KZOvzOL2w0pEXzwjFWW0EJmSkBDXcXDxpoOhO8EqiyRC9QCdDt4Ub5fpvz7fRo5bpj6PnODyPHoN0eHOYtNolS8fTB98QpoB__iLYH.x33tmBUV0v1QWIj318uSVonpcYWOzNGOF8YEGsyKvoU9WTxBnywd26ZeZhVnfVI1OXxW7QJHyFTRuD_cJKVDUpJNI10PE7sQQG3B1XxOGUtvrq1EolIsmE3rJnplPSYpEQhbBaUXUBWrNZum4XgB1YYZcxcjr5R0qtpTBnlFGAS42cbaO76BkPUWTsjwfBn4MCaCrpjK62i_bqY4ui0sQnhlsNnxpBOjrORBMtIMogKLIQTlYF5IiE9ELLoPCeTG_8WFqU.c4FUenjplg4D1wZZBlYZxYrIslbxd.rj59QeLG_2AsInqz6LAgz0zETgs_IToYG24YFo5aHbVRccOY4Nd5iF7pAPXehm9_5FrB_skUvYTk_0kEvqcf1OdLRP1mLrawiUTSv5rjhSFWIEdsBIDKmmwHAhvBPU_EkqwBM2OOlzzrfP5ypQQ6E5WqtmigqfKnSmx0zgJsnPdZaqj319UeqP6H2qeHvpbG5Bfg173qbREx.z0pRMMsiweCvDyY94avmxOXoBDISbEahtjCXCEHHAkjBrBj1R6iiyEJujw5_GK_jNLtmrYdxTReuQjEXrNxUngeOk8kwEfGiL6BmyqsfkkTf7CdbnGdNK0bsF8oFVHqfCS9iDgCFrpkybGoXJ44g7Dj5sGmypevk8Tcv5w40vz8stkjq8n5TFx7t8enQcSij8mcl41kRKEkVhdBueGWpnWamIeJyHLetylKsyFvoRIsOhG7f87Oo9vEV1GrwcN2c.R7rQguRGba3sXdYw_V.t_zEuGcqVNh1Xii6lkLd8C2zedvQZz2yMtz9O.e892.ILr87rwni8_OK1Z7XbLxDQyiQlxMXbzlMyQ86PXbqnwEkUb66G0g2aeFdwJeZQHxLyLno.rdKMzT1dlFHn81mKzNz3hlKTx9l69Rokcsj4t0CoulpEDfNJ0NhEEIO5VTDyxQH2ImAtM1FlXri4A5zWzjmhgf9QlpVpsqJlhVH8t7TNCdHM9P9ixzc_7dN6LWlg_iuk8TndOnqlC30grkzK.InieOOZDpd8ATcia0_YFV8Z2S5SAw",mdrd: "HPIoW9cyy3oPdmqBldGDJWdm4ViPYNgOHGYOcfFqoVk-1739240817-1.2.1.1-S7z4sRsooNvHtHRx72sA3Q8TEczNKKlc_2r424stvyeDXwDwJBAwxqRB_XGSEJK33ucjZsXkqrD3ZsqZN8BlxTa09AfwOj7P5AFjku.tstZ2ojCGQy9A9pM6Lo_jmnrtxv7hYlUO5_GOmgYLZXPbpjblvrnohgmnJPezsv4SBu7V7TN8TAiEffLHZtavrDFsBAtr.4SSxGuZU6EBOicSdY2DPpkNjtyJtH4ALokUumWdruxwlAeFx2L2Ut9CZI5aXs0zHy6AcU.0G1_wM5GLQOYdzT0KY2raCD_QG_EO2mmmUa6PWLbTOut_OlNfmPX88j6ArY1m5KiWATW08qhDYx6es0LAjC3bhIE4AEThTlqeK42bjq1gQ4rrezXdzdqWxQH1JkcUnAemFz1wj9xMBvQ64KnHWyVqPTk5M8bQONBA5YCC2lixc63uun647R3zOoAZ4r0BNLH5p1FuziLqfuRjWHel4qEd7xZQQyc1Hmr.qU1Fxl_DixvQb80gD6.LOC6pTkSvb362ZwvYYrAAas_sgqXEZNE72MStX38Pvr6PX6XB6mhV4zotcSKSY6mRBa29FF7rW5mVmc3cEqYiIVKxA1Cq2Go6hMmqIbkbXoqFxgB8M4G5FrJ0iEvRisG6Vin7G3YFnlFzxBFfF5tIsi_wAZfOgC1GlRdblrQsSLlSup3ILlVGny_FeZ_IJ9WuArnD5k56uk9QUJbTDwS9QoH5NJWCX.Rmv22xuxEROjsp7jirkWXdJ4SsVo05QMtQs4Xu69q30xrZwYNk9qL9dTumxlWq.G7YpWD4O2tghJhUfWXlc4863iO9vrngRsMRq4Wpaw7m0XxZ0RSkblakfAiVxdv1jpny_vTKF06wCEbmvGExliXCqxb3EbBTEGODjSUSDqQXbY8cfukBLU81S8N.NUeEiX7OmksH_68zZU_yn18Gcrwq.MlYlix1kAMxVXhef2YleX6YPr5SUe7prHIjX_OPOFdQ.p50wFH67txNI_XCXIgiKBpBfwNoM.5FnlkVdkw8G_6AldU89Iy9gZyr6ZDo7_CJ7Xy7G_QrgL3a5XYDpLeI.luqGdC9JNCLgfbq_FQ2TMyWyWbAqB46rcD0GexrUXTMNSXND7BRqqx6gK96AfsSA68QihyT_Pb00hHZ7SNSpKqg1BmThRkFIgmLfe6CASWYRZI.vngmzFbuGeeJ_AnksAMsxYt2pUuHMIol9mmGiftCg1dkKPx3vnFr.PSfpjxSryIW.o9W2IDxpz7wlOY13lWUJFb.oofDCR_Vc8XV48Z6WmIqGuDVTL6gJY7A762hVeE9uNCkBz_FcHHmNsVHrzqpGAOSc3YaHEHt0aU2aXuUzbc8fYSQ1kdK_awX_t1DblBD_cI4gfgl9V.WHBl11TDtAk3Fi2kG81q2Lr8xm2wfBHZ.MuLOBwjxE9II6A51AqUOfJdmar2de7SjcqeToj0p7uD6jIJNf8VNcpiW.RghcHGHf9ZNdD2W_sYT2FxvlTnjUjcTKtGTzRGHE6aLyvlSS0f6hEr5aaMi8zWa.5p6whhWTG0AS_6ghSUdBADH3kQrLnpBehtbNhdK_wnHNuxbmBjRD5zao8yxOx2VU981UMUE.Psc63Vw93dYV1iRdT.mwTvHNA.2a6RuFutVD5NCVPJ.ZdNYu_NkVUx5wB2quyZgYZIOjRNIc5wwBn.xT6uJ.nwri5QeysaUuO.J3wW2IXSkEQbc32RBppNFRYaGUB7ww0ZXNbppiEhxrmVRGVYMWpgOeFMLev3RXJWnE2zlhxtRzIpXPd7pneXgiaclLSHVDQB3J_d.kfxW_YIb_xrNX0vSjIbPeTW8vFKuyN50H33iEEky"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100e5a2eb833adb';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\/710455485523?__cf_chl_rt_tk=44eItzMJ6U43VLz0iweBEOv04tHJOrzYr2tmvOiZTwA-1739240817-1.0.1.1-33ZcgbrkXGaZlmN0iac1S6PUkqktnGReEiGn4r7VIGc" + 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