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-7954328061-gov.caltech-edu.pp.ua/post/276808827599

  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,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);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-7954328061-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '91079ef57bda0641',cH: 'EAxQXC3g0tGrN7aq6qlcpsmf6dhwCN0JoVYN5JTti_c-1739311322-1.2.1.1-i3OTkzb7OmvNc0LhToy.YCUoL1Z_sOZZjdE4ucWzX8kylSixVKY2zmnp_CMhjCrd',cUPMDTk: "\/post\/276808827599?__cf_chl_tk=CWBt_iFGqHsUDGVzxnwIrqS2gOvaN00TEGRYRUCLTiQ-1739311322-1.0.1.1-4axj4DFL7HIqCF8oVLrXozuwqE.IuuA.RldOOB9Z_TA",cFPWv: 'g',cITimeS: '1739311322',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/276808827599?__cf_chl_f_tk=CWBt_iFGqHsUDGVzxnwIrqS2gOvaN00TEGRYRUCLTiQ-1739311322-1.0.1.1-4axj4DFL7HIqCF8oVLrXozuwqE.IuuA.RldOOB9Z_TA",md: "8GZmQEYEb1vBDL50WglXMtH793jnKjZu5_9WezvQgEk-1739311322-1.2.1.1-yTdz2t5MZ86dHBjEK5FzqYMKHhIk2zAtJX4QzBSS03H_ev_rG.P8SVR.ZpIG.fHCb.6lzm3SSV5PRo9RMgeM1ZzXJzXYZkTMzkaiIOpdptjqAhbGXVoh15RwmcA_A9sreqgZJuAzTaX9ZLN1qo5VLZplKzInow_.MNEGEtS_1ysDZJuXMU0OYo_YWP57xRiskBcWL4d7eWICVWXKrJTC.meZB.qtqmMH5GPnGtS_LQjMP33lJRXcPuDYAbG8LprVeyZlJh7GDmTz0FHx5aVAOAivvSzysRDFFBxHSwMXwk8v1pnlHtg9P4bYRzsR0y9L8b7i1LgWkbb_qZRgP4VQ8ymrCGQjhxwYo3.4jDRJQHJr_Bv_UheIUs0ANPxCz6LuLAWJqwuP8OjdyQf9FF_SrWAdNfFa2YCHKjbPHmi4zCJO2XaWmhZPjlu5AaJ1AoevCvHdeFMav1H4sKadXzUZigTb9nsbeqmx0CcBovTh88fuBdvBHDhlC9O4PUcnzXqxVIkPbEsSFfijlMGJU4J3dJ4JfHRVTOI6qhWt_Xkj5RURjHf4I9urs2uEUjQiEwPbrQEs1AofmnLHohPqycKUU2dF8_UJTAkt.vgjnV8Mevd2Oey35Dn_nBwcAAIdWn35otrPEkSXKCYWfVecbcSJbL00n61X6me1kVNGqK_n54.zpiFdagzBz4_xYvZrS267Mg2QgtBrI4evyDY3Ot7IvSNKXBACoM8PmhEyj8LQbGOZFqCIRcDi_iqw3Aotqx.ZIgf7fRf37.EV9xiKa2dz8Ju5z5.6_xWzFwNTulSvX6HS9kPzIxDiw2MPqKDhhVKh26.LHhbNpd9n8s2XtWc9WXsRBfmF0nmgsLMmHocubEDwiPEtyVwrVAxUNVZ271bSaHzHPA7457ZcYZk8NHgM6RQ69xuWG6tvqIIuZ.9QYtx13owSptUc1xjG7vBZ2AVlfKAAc03sxXQN1gcRfwjW6JprH18XBbp_v2gmiMJd_u4L46i1Ra4mWrnemTGsWzLW8AeEbpq8k8LGO5Ou_HEqpQdB7RiEXwNOFFa2Y0GurpXjStjBWkR9QCYGvfVQctKtOCSlcH3dFjd.mCJGSZjuALubU.MyhrAFiBFAgBHyLGs.z8aHQ576uY3EKpf1albS3UA_BbbRQ0IoAyWOkUcAU1dmS.MR79RtO6NhqdoPbrtniugiBPqBIAWVZtMvS8NOTDZ335NxjK_IQTpH9KjCPJoE5eY3LuR8FTL0wlvng8EHf2PC2aAxKGx.v0Bkv4k_e3nkcb3zZAdi2P5twpsprCdH6m4.B.FrF2lADn.ZdqfWdDZCQy_UT6XEvHHWEUmaRjGbwDcecal9vDCMmkVK8u4Y.xmSSjgq4JhHuDj.Px8ydRDGPxPRMJSRH5IWltwdgwHlFLmJplK6Jbg96ccictTA6iHhRre1a40jItwrTTle3wsR0.lJftI_CUPOuyWu6MzB95qrFx2gIR4sAUS4h9012.rDjt_4ADXrPJudPEIw5dTwCQKbbiRwaI2l8uw3FHLcHssnNi._XPMjGD6WuJiBEqGIsKINpCxr0q2iL1R4DRmpGTUHrsttfVaUlXArky7OpQEoXUNhWAGAEDKVqy8xb7LFDnCXHGlet1Rt.vJR3P.0d_ihAcGn3GYI5g.ng.FGFtgxBgYAI1wyb2UXYZMWNYpCcDQd0biK0OJxufmKrt2WDAd4JeyACvGSSSMiXM76T8kPR462J25JVpr3x2FTCF6CBLTtUK0nycCzN8ta3eELbyQI.9cXOFYO66jRE2hSJNkk.DWlDw_XFWkFLVNkIRtL65P0N5tjzg6Z_QSw4_2QpDaXC6jWWW7sZDIRrGWMw23qCR4Qkf0ILzR.9FkxPbygMD3vAvPIaHk..0DQufmB6l26GcA0eXG73dN62Mhz8awO2ITAYUfuyVtQObqXTHBRjox5O6OSWMqctH5mLcJfl9n7RUHxDabbTQKjTCZZz.H2vlIMyuzEf7543WFXkvYil1Yb.EyeR7r0WnACxfVD4WczVxCvXRncb1id6Kxwid5RRy5HtXfs1kpJ74OjVfZmgQzZALUVFWaZr9wVLdD41UJSBZ7yDETjmfsOq1K6Rismkb.gGxeT1txgze_Txh4CfV82RlRwoKKAkRZKXxhZjhbaYjaZ7NcuRo.t5vI00AHEMQCNXpMaKn5.V6VnMW_NSE22L93weXEneZLAe9Br087Y7hlUEf_AA2TCXqqQXYNkXIoDVH5yVSoPIQ",mdrd: "I7wJpCtlDDqKzHiBrXTiWkxYdgHRu3l8N2tG.bksVjk-1739311322-1.2.1.1-mTOyqmVvPQT.ctVFKztso_aniGc2U5ASa7KppFqFXG40ISO9CFJTGJPmpZ4C8gwm5gsvfDuvZtpmhHSIJp2clhN2zhJE6SAgzEsr2tEnId507Txe.MnvoWjeJuE8_nNkNW6mQ1VVRnZasC5hsiCnO8le2jKcJXUDmUBNSmFXlCcdHRctLUNfWJbWAkoa8ro7C07nBXRahEkDHrBp4V02w31wlinj91kaMj5GerH37UEAmne7iaF5mAEYBzm2gJawfEpvWq6jZ7GWI4lvop2wLw1vW7m5aERGY0eV3tgugHTDUsakMSFS_yQ7IPW.9jzTiv4_QQnlMmOneiWTIV5tQE9ZCTYYyI1oYWV6zVr8aI67mt8NyiuN8Ii5V9W7ciXlIdM9YPOncEcKWNNJs6akEgY5WQLR8DtXq8FSRHEIz2wwLka_7p_73n2nxUeyhjSuOj1VtO857WpxEfkeV7W2PTyHfyZvzjv1a4.wQUDJDzj0p42418l3MxpH8o_8mrZPvrzrVbs36C.yJ7m6ahzQZT1V7aR1bM6GifvXoxLsfL4ANTVLpZ.gIlYrT7JLiil2FmtT_EyOlPxuIo2CtblLewnnuWrqszLzztzSB6C1_5MlbkzQQxSBQ8KoQHMcGYtAYqGPYVEMKFQT5FjvkOn2J08p5vBpJRDlJchq4rXY24m0vtpCps_KRvVOvb_jOvvPcivrDwWC4.8PlE9lnfzYGaakE9RCtvvXr2pgBFeN_z_8BeB01Bwh8nLRVmzTfqkKHuHlH8Yjcdj8THwUYWEa0JdoWzFR_517g6XKjQZEvlp85BmuDSLd7wfGhLulJUnjrD7divuTRJC7kNMjqwjcN7VAjeGrYFv0sVDlWM3_.solwSpXbyGC5..Jzds9uMssIpMAZu_gJaYrIGG83YE0730Og8EjxEmenRyQ4oLo19G3E6duNtEz9mheABvHQ69GZ8x8HE_5kt9E5frkA8J9P4.V3ddXdOgvCu63WtTDomQT.T_.EgOz3WGr_Fj8BT.u7VPAXC4UH5at5JCihUQqowKfH0x5aSzv4zOjEH8N2.Yy6NBxC_GXo8K6AOFF0Kjlp7f3dSI.gIGte0MjbzrI_xSFWI.6gANefgYyHKbM2WZ2gdhgf_GOeVHmMYRBYXdbzOZQLzmzTpY_fDhyuQUZR_IRpFbvHn_2FQ6gvf0FeZeDqm_LeclIxOMpZJOZWve6C9vDJGPfLLGmJssjf4vra4FOf9OuL1RNhm6MeOrDX06P1v4PP24zzhzCanjy4ZnRc.8af30zaAMB4ClbdlmyhjI5znDCDksfkGjGVwpgs0CJpy6BCcaD7YYxxIvJs6XVodVUOUmIdzSdaFAE6Zj.Hr40NZqjIqpj3mJ9H.QrTK0DAqwpQCBwYHzyLo5KURExmymelc_aK2RSJTvdNUhP6yaKzzWbflaGRJRF_wfD9NzirekwY7vxBq_pgU7k4XHrNnFDZmtWdJx0sP67rvKHSJgW8aT66D_0SAHeZnn6I_iXS.VGvw97ScEXjnZ0htb_1ximau_Xxz7omvhvfxlPB5k1rwUVWyACGmKb0f1sF5_jWlU3kC3pQCkCuhaPWKarY_R_RYJHc34RHOA6UhKcvdoV3zBltEx.6I24u7ANXCetV5lkibr6yOYl69ySxGtpGZImYV_iKBAHWXt2BCfMQbxl.y.6EU1lOOqUVWccvZw231a96ubIswywNemlw6RFpVJOA3_Efr7BsVlarMrzlwisQkVgApPxTPLU9PiPznTiSttmtcgDJrpEpsRb28Fz4yUDvNsVSFCj5RatoCTAU1Hhy95Gfs6USzjuJIAinleWWCmoznn2IPsO.85piQGrYjSVbyVQNzdAyBBctw5ZeQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91079ef57bda0641';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\/276808827599?__cf_chl_rt_tk=CWBt_iFGqHsUDGVzxnwIrqS2gOvaN00TEGRYRUCLTiQ-1739311322-1.0.1.1-4axj4DFL7HIqCF8oVLrXozuwqE.IuuA.RldOOB9Z_TA" + 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