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-9876012435-gov.caltech-edu.pp.ua/post/0764215389

  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-9876012435-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ff4d6068b9ff0c',cH: 'gEL1arL6AQlcpGxON5GssdSzdXIl82vYcvaWkYIPsJw-1739224094-1.2.1.1-sXNJBXPjoROkAiwnKHFqdU5pBYlAdwL7_mQhX3WpaEUvIfidDcBr489t31FACMoD',cUPMDTk: "\/post\/0764215389?__cf_chl_tk=i_rqJIR.q4bYfJijYI.JqaNLcRVrAXhF2jAb1xRZgcw-1739224094-1.0.1.1-xc.VlVtff6cUYWIR7bN2X4eBlM_I_IWaVua9Kdrz7e4",cFPWv: 'g',cITimeS: '1739224094',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/0764215389?__cf_chl_f_tk=i_rqJIR.q4bYfJijYI.JqaNLcRVrAXhF2jAb1xRZgcw-1739224094-1.0.1.1-xc.VlVtff6cUYWIR7bN2X4eBlM_I_IWaVua9Kdrz7e4",md: "pdZIFBAtReKqWwiPGcj0xh_cDkx.FDHIsfawvgbTNmw-1739224094-1.2.1.1-2qucCBillSWWNWuwd8MnZrjKuQIdKr47qQivtd7ZOiaqg5tJlETrI1CiUSCSbN9re2oQw6RNbNIcT3Wr7__HeSAcxXI5SmTd8RHbWb4k_vGuThG_cFSeaG07KvFTF21DbSNxqhpKUOoZnpYFgXdzez2dCdiqVP7XWCIyK9u1c1H1LD.sh2tSNJN6RP19_QpjuNACwqSJfK3ReabX5qGG6gHwSyoVhzCY2KiQyVjlsAdlWuRYm_7Wnd2cJ7tv2Sk24OSBY6ZRgFHLvfaZLmx_SgDI1LPsme7l8lV8rvYSLwUoQkOrhfOgao4AMHW9SjEk4txscNVuIPzT4hSEt0l8l3AAlGY2IQ..Tc0hlzlV.Kvju9BDp7tH9fmWPPftZDASPUlAPbgTLZtzSSeCZMuETPiYqlPTg.5beW6ty2h.9oTaUxzLY8BSjnlhaNUVNsHzckHN7STL1FhomFMgMGC_QGGsSVOs5n1uekLL_3ISsUhbVXwIZIG5dqZMHi.LWx4xfcj30qtQHxTddn8IuuHN4PiedoXSV7wvQiH_JqN6Y41X2EeqMQN3pJ3TLpnEOG9XSh4oFEaY.Pd_jQ4LohqQj9EUVRVe1w8.YL8daRUzUxok1dN7S432BB4VPxm6TGGeioVkz1GBIRzqJsGDuw2PCh6OwwTRgD40AAhpfyw4NbL9n255aW8uGqXxLZBFiClOUZ7c38U1YCWA5vHA479AaAZd2GIXCv.zrdl.XVDtkDkK07xnqR_t5vsDsSFfq9YjVMtFoyrchlAPPqXb9I87HgGX8e8sQXCarrMbuKLyCKg0EQxADQgFes0mNIIyRbMBrhDsgtorH0PXYXyfP6YNKQ5iI56njK9FroP0NplZU92KhgdRgbGsdsvMbWnO4eeAX0bVY07g9nePn3NqvvAI6e4ZQeSxLRMD4xR_ri1bMBQk4aQlb3HBi.vNeAQva3frxpbQBhOLpU1O97eI8b5EmO7k9NPHww.OBnbgLsJhKUomxr2Y1fGLuURNQmiP2zKpB9BVrmEIpbPksg2EslAnA9AvybtaFb4Ti4yvkLwuaFwWRvb10EQek4N9lKf5NLGbhGY0GNDh65k3vGrebRfWU2EOMm7x6oWXheoHSl.cQU7GZ8avAx10dFS.Sykz99DZ9WtHgqefrUw6gwdpdRASlPdPM.uANSIulTEYJRrs67Fkq_vwqL7uCs1m1WQi1uO71A5xO_qrOimXgdrF7znfYToAoVRDrsVMIgX9uqhFe2DzyWEkFYCeRab5IgH5UgOpF9QYYJwRYAB_RDtdN5MHh.ks36V_dI76Q1QZQvVySG6h5ZDDYUYJ7TrXMpQ553vtMdOaREZ28CRGFp2RrsFVRgXDzroSKACaRHwA_90VF7Msv.C2tSNMpXWcsWqAvyvsTzn5wCm8HVW3y0qP8wxc3JBWVHVpiBeB2yeVt4HTiPI_EguUchtMZcbkJC9JAQfspfIxueOjIB4fX.7HTdAZxF0N1d1VuPJN3ZcHwsVd9paiY5lbtX19tJnVA5EZbdPq0TePuYlpeM25X3x.v9mHeTsrcuy1Z7M8VqyU4vITZVZXtS0R1eVkXZ1RhoPphPJxBg91NtR7anrB4393gj21bdZoCb67IqMUjp5fRubUc9_Uy7xqSkO5B2gCaf8e3OZymVE4r_pZ1qNGE8KKkCTggOwse34iYdfkBevVclYdu2uIsFb4OIVqR0dytgp.80hic5a003_tfxKbkM5aanpVx.p4Fr9D5kVl4kFAGTUzzveNe_D2zCf31idHg5pGu_KmcItBGQyLmAhudRf60CD3xZjNPjBwbMabxgP0eATrznuOH4bn1BrwEf8MgY63piq6u_NUC06d7Kb7PqB7zk0ZBBu7gn05JKhOjleHFLHmlTawnQTsGLebsYAAiJEKtN77G8nOeQAeNNP6Pfrz8NT4n6fr6Qh7JWUoOniwnCm2NUNuT1kov46hinbc0vj_QEH7M064JGJm3c5pp7hE_vuUXq3f8sBZsBTeR9JJUJHWTbscPHzHI5u5qUDkiiEqbqfRBpuwY9bt7IvphW31T3Oc2RGn7n5O0VpS_Tdc4RTTRR5dGlXj2eiJOvGhGZN_DfB5oze27o.3FjpNiOFzb1zIczZE1Z.JrpmHjKg9Wx0P8GC6hZSn4qQzthGAnmcPFI1kKcb04p0IzzS0Ji3pMCvcf5BhySuazNdX20aXWl98nauuzHMXvp3m0B3tKcx84gAVy4rHtRGXNgJh5MA14sZx.g",mdrd: "V0Hp_3O_idm1KqAZlFAOJLEIvvqdvO0QW..0HzoyAv8-1739224094-1.2.1.1-21c_LCOJjqdFpe_wFGxDo0o.W_CR6KOi5.QAKDcqfRMAGRX..JQVfZoGzzruWH2ZuhiGRHkewHFEowkI3dIXwWkcHtHHO88bDfymCCrmUv3DICrbVvjgbFYgXuKh7h3ZykXDjpg1zMGdFyYPviW_F7lqe3pMu77YJt4nOLLAKErqoKzzIhrBUYgV5Xe8k4vlrJTmjFjB9wqXAKQS9XJWtEtJy0GabEa38eEGgvncEV1UY2vwa3lTcVYNzP2B46Y_Nty5VHl.jT5t5h0ZDHYbXkyHsh0dpJ3q2I5Jwtmf2n.r7HD9zRrKuylccvOk1TFRVvAGBCTw5jakMm8H6D9Vk5U70xmFbT4o3zdq5LtZ3pggXWyJln8P1Ej.nr4HL4QgwYB8OrvFLI7JvG86rvJ51wfC9qHUNFG2mA8MMxU5sbZM3Y_8ZOG4hGvLOASBEFbHWshTrbV_vZFT6eedJjnJ7CLsuNz83GfASbRAA5BX8.dfbdJyfry5yR82ed0zxbqSvyfWy4i4Pzduw8FtVQGMjllT2sg03V7P0j_41sXLedbKQKhp8smQg33j4dEbpY5g_4653i77qnbSr8e2kmMKwv6Vxw0p_wwnJQa_cTWH9QwQO38.4TZt1i53f7g0QCXiIBubd2C4jNPt0vbo5dqpk0OhgSNeQq3yqCAgBifyN98kHrwIuI4KGHvDLjkSG9PWqesSRsOQJwaccfjhQeAo7crtg.yFIHMBrk48dPMomECig6ssHIrItcpgyPtsjuVcCf5WUVYoD6Okh4bNQsQw.NZJzorAOWEvMPApW8oGpxzP9lSEGRkL0OgLMhoNNzCdULXZuJMlRvbPYgT7OnovIBIOz3xWh9s7rmb4usX5fu_EIn6CWcJLR4L4SxEnxUpo9BHt_B9HCB32.uJ7swdLLsi8Zkc8eBt2hw.3ishnfEPCv1ywA0VO2a.X_6oitfViC3R525g0OhHcsOuXQk_5JxungBWcSuQ.OCqcjxrFiTVXKy2RVkFLC7CpHS7PuE5MvXWz.ioL3g73qr47g8VlXkNPBoa1sk2.5d8asc_TLq7TsYQxzoEdMW9bOG2oDP4MgmZ2lVXgSYXtu8Rl1eywsSHfyTrX.i7PBQNKBkRKfjlK6nr5TXEHPEvZGHwsk2FSEorPFG41vaWpS.tDcjh4F9BKEon6NSLh3QQ39NazmhzP8xVxrgEjFo4Gl4DylzROfGswMbMuRAOSMMA6kpvPCtjRJfVlZfMHyusTKUyB_xmyo0xDRb3yyOFueg_1Wa7YkDCP97AtMSiMqnFnveBKULfzLpQr6.en3wd1jVZ1eOpuudB73LskD_RD0xa45O_7CQD3Mdm2ug3zxGwVUKlkj72YFYFinQrG736R7nzDl8PK2herwCrNDEN23yMq9G74teaXCGZytWbVPopV5SRFVql.w0iHm3h73lix3vMp59FF6iPOJvTQ7sC2fWDeVZ1ku6j9aU6TlMQmvyVUc2JnJ6m7EdnZyezEGe8XzI5bvceZ6s3.ftk_fmNoMj7vuP8QvubIcpINyvVyew808qqRWXV3TBoQwXysYKlwf7wuTKyanzBtdJ9x_4RItcfFmgivGnHIQgA83IU8Lxg7DwEIucCyFA7qALxP0ZEFMNP785mI86Uf1bx9y4TXEtW9SBGBU2MhBpOjw1t94d2lyH8dPUE45Tt6v0lQ0ih34iCXlio6tHfZTO9q5Q.DkwNcini8Dfed.S0yLoiHSxswrpBFpTXvJy.r00H1MyouMpT_PZhwTmigHS._lRQEUVWS.u5.hsKctNWTJ.k7pLESGiJb.fR.PdX3EKkhm5l6Uyf7OdJPqva_A242O2Mv_kFaYvgCpSBiEULeO4vqSNuiFE57Sw"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ff4d6068b9ff0c';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\/0764215389?__cf_chl_rt_tk=i_rqJIR.q4bYfJijYI.JqaNLcRVrAXhF2jAb1xRZgcw-1739224094-1.0.1.1-xc.VlVtff6cUYWIR7bN2X4eBlM_I_IWaVua9Kdrz7e4" + 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