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-1758620934-gov.caltech-edu.pp.ua/post/961765123899

  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-1758620934-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ff637cefa807c9',cH: '01NDjmOqwU6sFgUSL.glQ3XlW_LtGf.2uZEW9pb_TyM-1739225000-1.2.1.1-3cNmu1ifcqUQkB8QileJ1vrUEWfQBWYjBDKV98nB2HH6xs.eet0NHXcCkzOAhgVb',cUPMDTk: "\/post\/961765123899?__cf_chl_tk=CogZS9JRO_LbhjzoVn6XTuHA6gRKn9bLqjOucYIM_fI-1739225000-1.0.1.1-AWRxCPX32yFzfvPW1eddQ27FyylAFaRKXvfucGNSo44",cFPWv: 'g',cITimeS: '1739225000',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/961765123899?__cf_chl_f_tk=CogZS9JRO_LbhjzoVn6XTuHA6gRKn9bLqjOucYIM_fI-1739225000-1.0.1.1-AWRxCPX32yFzfvPW1eddQ27FyylAFaRKXvfucGNSo44",md: "C8YgCbna7MnWQTYgWXHwycPlK3vz3_kLeQ1RjjMF9rQ-1739225000-1.2.1.1-SY72y7RC8LQ4QXIo20d0ehXnTyTgYGo1KCv5layX1pJhIJW97QCOBv3mYc_zt.jLuoFKy_WSOhoaNqb1Vh_2ddgD4cqU5S6u8aT5PaM8WpDygUU1ODakvHIHbLq_KuoiJ8PvVS0UlDermDScvcJvCqN6tI1S20gHSuUv5vNTZr70ciW9B0zCyTlRDnW_oE9QXy9SIWGSmGbjb3Calp6o_0lfbVimDwbVfK_8XCk68tOms9NWc0oyG.YBLNqAF1ujYTx2Juhdz3l_Q1O3hv9x8S5EBdYros6U5hUSSJqI2T0Y91NNVuT_HpwUgchl8ZPpSokpfejloRjmwmgfu3cs0Oaw29145huPGKTG9yr6WBKY1Lhdh_vkKLzLBOiAX00mTgfn1Ng6Lg1IJNwfxPl26O0203e8mNG.oxxU7X0llm07CYZYYjJ7UhNUDt_w.MzJdh4c.VAaF_I75HkzkFQcuw7LRo2SVebHMhjbVAyjrK.S3EGHQ2JT3jZo3CO9NzcA_MceQTXDUWZserzLbMnN.NN2Hh07tSUQlzQod4ATxDaNHuojBovVgZ18upacSiEdqLJkNpIVUKuXGZ.qhoXzHGh2ud1ggZGLhtK6Go02EV1ncV56.1pxI57nFPvY6cZtz_WlLwjGAeLLR9YCEgMVAkU5BYNpR3EQhM4Sm8g.8pI7fZcgeSP2nIpZ59e7GR3UgXJf8hPfd2uRehEytTLrACjQ66AURjyan1Dpn9TQ4PhhwMD4PKT8LY5BNG_kceZ57cX12k9iicx8oxGyW3qV3G45karbGbl_Nc5apnofT6N6Os1_XQpwNYq_RMTwyEZwZIrU3oH_vipIvs8YVOJZOvYCYEUium1lSWwHNPD8bZ_Uq3enOU7BNWQjZPAPIQTXJyu3InzFTAW.1KzQ3Y1f5vIK7vlYwl9Mr5DXkgYaWR1udgRYd0CjKASzdOfHcE76LtF9GRWYh_uMfzdugcuIwjjfN7Dswqot6zbzsbjXpzhNfqzBeOgIRQtHhjCJfuO0HU8JeAAP9ynsm6K8SzqHc9UpYquBDnfO_4RvLlluRKrKMapkWXTX8Ll.NHD7i0knAVhMNt7mW.WabiyY.FwZIvkXg5TSmJMo.byx62gBpeqXGwEownGpMrlx.oiWfRqez9vTHNwK34XGSkviW.O1xp8DQ7f_Bx7UHPnZ7uF8pTFeyJysxM89IWf4emf7JCWPwBIZGYFXnGzhfV7UZDhjzOr2yWoMI2p3QNNJX98a2dQLGYdYC5pHmf1THJuYf4TzKvAlg86Vl5JY2GZzJ8zhVLd1giXh1XuP5PW0EH2ixQgV1Q.A9DxcjeBtBY955WtjebtHZWkVa3iKYTRytAdj.UvYXksMXIdRfg8PjdPytxIyCnHbTe1DBUUe8KDe1cYDkvpYI76ychHKkjfpZDv0hgYmY1kOHMVGewaMmFoM2oUXNYqRk4uN_YJnOtNsK9HU4ggOxzipb_tN4GsuJHeuW82GVAPQNHCkqnJwpl7HDR_3jUksz0OIW4IU6Fb2dDTTltvNqJrjBF8FjEHP56Ucv9H4ktCRC6ku_XFK_fjL51vw5_w8MbERAp0IfEjQwjJc6PBmgEcJ1Y3v8_k7aIw7CdvCAgvXpp8_931uvyGuFSHiBrBWCXeipSKXFfc0sioTroVlJX6yygppDA3qBT9p7wYC5NM5A8bviiQmry2PwETJ2EhfxGbIQLHR0cND.osnq6gmSEqJzQTSXeD.fb.qDX4PhdmSfxyhqu8Yu_CQfLICNQTcoZ6bApatnGQzkGd4OxBAWWvxusrHCJ3SBRC4nOdahv2xf9n_Sm6mTA.flI511S.CZQCoRAWiwyopHk6gpLZAe_JpoHph2EH.YVayIlWnswNDDWc02Hu.4LzBgH5UdijKBcXHZExs5uOtNqGb1WQKlVYSNsNe4dP7d8tzV9qDjcrl0coQfGwkO1reaPhqoMglvjMQsQ6KtN9vD7yHbTFh4SeQr5I8mq2qQP2Ug1zZPjSp8B_wdPRFnDuEhRS8i4tKeY9obEcNnWHcqHkEViz2pmaXmI4I0QjjXrMDMXNCqjBU1SlvNK5SkViNI8F8QU6lHaNcQNCVlTVg9urzKZIbt8p9ai92QE.7lt0fHI72RQ8VH88bBQNpPOuU8iPrjBUctXidmby2dIhdMWK4YviZ1bQfnmunCJUQnwtdyUu3hzCXcDPXp.GHna6grmYgPx9TI0GipLingX6TTLLpAlZnMiveVeSL5PpHXsZnEQ",mdrd: "z_MjTgo1uG42MWbSYj0itzln9r.KFlMLUzQOQ2BUMV8-1739225000-1.2.1.1-TcU7DKvYDo7e465HkLgfONWFcaEQ2VOIAOOhKI1L_UIxmXdYKG6iuKLJZELb3O2GM0kqC7U0UiC5yWXnZWUzCiaPGbVGerIXCPInOn0XD6foDBWYws7k1G0igZNBn908e67jEipX5k.4aaqGCjJ_7fWy3NMXMEvuW47tLX91L5B8b5P3XbkhJjWTviLNh8Xe9gfnExhAYAqJOYmqrdDV2zludY0WL7xAO2SbMuk3_nkfj36EtsudvLYI8FrJv8UL9h.koY45R.27rYMXHFrC0Nv1poktbTM7vNH6biz0jA901gexdgLnaknifYSFbBarcFRmhxn3ihhoKZFIHvDHGgfFPgwy8XHiJ15BKuxlEhKWFkjK_B1fIplh7zAD5zI4nsk3rNRKFaorvLBC7UOvdvliDJNkLNBQJAcE5zePu81IyFljY74aRZYRUaFn0QdTqsERKSVDPdi3jUig0U0x4u5cR7Isamqk.6wkrpoXIKpjTIBp4_Id6XVJbKgJM.C6kCYJh_JNhuK5Xp0MjaucVvB1czbjC.uHzcKn7t7E.KkBkBv6srVNIpYMVGCuKDV_dW9AAt7Ysc73sGXNNIR2D.lrQxMjlahEawf7JrWzzgcBcaiwkS58xP8s9XcyifdpFurnCnGyU3w6aL7H0VgIkl68w6hyjkTsY_.So4fX38MtQa3PjHNANq5x4A6uMcfiYDm9eq5ArDstGHyIeC.e.FV8fsibt3yBmSwdm24QlZgtQ7URWblIuwbXe6na5L_Fnl1Ii8PyUw4VDGiOGWkocwXHivWwEPjkcirHUeC91loMCGswhnbXTgXwJsyx5_0HxFKrS807I.sSw0LPfSiS8UsSXpsYINPx8Ctya5SRysnfGllb9TvPAqcLpMX7ihWtL2fyqzmzZxMLtW32wwyrMj.WP.7Qdzb6Iu8AqhIvLHR.St1m2dYmYnUlwGe.RNXngG893RnlKFFdTc6I1p92zKxmSx9HuWyJiF9xCJq0cYwtUUbG4RpdBjm3gCr2ryguKGKvANX51TIh8LMeSd.CsYk_OUnSmysX.GaA468mOI7qgW1S2e1E1SBb_M2RNuXOJTAghe8i4dr3W8kjVBdoUUlDmhOekyYBWHQ7AYIZGpNsKm7vq0__J_ceVga0QUr21qIMMgT_JSwPi9UzfQ9ZjO0slOrlM2E_xgDu4bajhFIHQr_7._k89zD2vB.Ult9GoMKwkW51_y3zJXtxjs2j7SLixJhvU2iOMeAoqDqSAzZTVK4IlbOldrJ2mGETX611NVCMkwEpUbEWTutXRyKdS3Bfwr3J_xO7Por8zjIZeGCP2L1BU4WbGL14UyOFQjGIRyPUxgm5XZfmms64E3ridfTFyC2dNmVoxT.1AvIxc8jfSFfkSamK2wzxv0LtW7Jti5Lxs5HUS5FYAvsQC3anBHceZJVWXdgeJXL10Rkn4KlEO7YLis5oOZ3KJa9_uG0u8RBuzxxVZHqSoQclTuUUreTL1ssSWarqv4esj9_vFwdrSHhcmgQMsnXBAAATiCQJrzw85jxdg9XsVHwWB9cwYgXIHnx5qn.k6QLbbARpSjpkrSqq52lqSqcKPPl6h20XkRb_FeXknyPOdpjG6P60EViFO1cs7sO70t9FsQb7hcIjsoVxcgtwgkSj0QhLueH1g_PbSrzZHQWYk1ZE97o_hXBgUhV2Ms0ZJCtQ.YDG4KQ27H4tQjxaH8EV48aP8KZbkpdlPSc48S1vub5XuCTEC.q0Kqo4AagzrEFjRa2cHcgn_M.Er66_lLpkYCIq9tNaSLRJAndQQsByan1bzHv_y17zveD8gswn5KKGBmDnyd2cmoWj4dfnyrZOAaajBSJ_"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ff637cefa807c9';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\/961765123899?__cf_chl_rt_tk=CogZS9JRO_LbhjzoVn6XTuHA6gRKn9bLqjOucYIM_fI-1739225000-1.0.1.1-AWRxCPX32yFzfvPW1eddQ27FyylAFaRKXvfucGNSo44" + 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