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-7683420591-gov.caltech-edu.pp.ua/post/727600432028

  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-7683420591-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100cb0e88143937',cH: 'Pu9m_SD6j23px3adtzPyH71kB7Qld9qu3.s4zcGbkh8-1739239728-1.2.1.1-Y4d4l67v_L09UaqYZGCIfyLrnMwk4xsdBUM03M53qIcg1GcSRKCXG4hei82nXjhT',cUPMDTk: "\/post\/727600432028?__cf_chl_tk=KJFqdDhiVwCamrojyJnOIhpf6dtteUwFl13I4sWWpw8-1739239728-1.0.1.1-fcK4dwryiNL6W5bNm6O8ob3Jv4PvuHIzVVcznSFyX3k",cFPWv: 'g',cITimeS: '1739239728',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/727600432028?__cf_chl_f_tk=KJFqdDhiVwCamrojyJnOIhpf6dtteUwFl13I4sWWpw8-1739239728-1.0.1.1-fcK4dwryiNL6W5bNm6O8ob3Jv4PvuHIzVVcznSFyX3k",md: "6CvYepLywxTneBUveCyE46HwwnKYPzBQzB_9uOyyCYU-1739239728-1.2.1.1-F.OeGPdtXo62Kj8skmyihAnzf1eJxNq0FD4nBPOYcvP94jFLQCE2hJU8tH4nUtR9ewUElwTfDyGYmKcrQzo_RbAWrQQUsullYLXHI4OpVUKjy3IO2zR4fj.lk8jmcbhv9FnbxVtVQGsjPRVleGYVMV7gNBEozoIYkdVzicIcigCbX654cRNY3fVJxMJIUNDjykcW5rifc8xdxwABt3Rj22QA0v25WgeOpD4uvnzxV0M4Cgkqvr0xmBcOczd6rqkBWNZGZ0sbdmLK5JMtpU1WX.3t.l_zJdJuooOIdlpV2A4jDIiDiAQb1VyigGlO8Itu4XXYgEdIQx3ooJVH1PKN0KTP43Ke_1Gq8POooQPJ6dBQa_dlG_WGX3LiT6Fw10CW2pUGgxTkWREI9utcVkMmVFVpt_bLKoUdYicnR9Mmvgs1rK8Noe3N6CIEYR85xCxQM3cBzYc4FGKsDE7xWxqTEyStBtsUBuGO4guKPjVg37nAGa0Z4N2xEkBH.LAdGeurHOFVYbil.BUAg1uyOk2UKKOf2ogu2K_OD4bmM9lfbyEZktjwz2jNKGlV9mkuDanBdJosmUvknYx_W5jS6xEfpU6y9DaZyPVMxKkvrVqVom9DXKPOH.JNHOA._erGZ0Tk53eJb2ruQwYlMwsR56np_7Kd7pTq78zq_CDcMZ6OjExXc9cOTev_gtdbgWPT_G_vCm6n5sAJVzJK9vdqv01lKr1QCBn_qti2G3HEnvXeK4QRMyXUoQ2Or7TNzsRDJmofAFY8faNIg0GDTpFPTIr3nUBgTMFZvWRlPhPCVPc2ZCKuCDFU.8fbJ0X3rdnLida6mRAjSQQsvwq2xjjQsR.h3B_FU31f5niW9JSBGLEE168GYMZ1lEed8zhxkupz2UQJQzLiTTn.5IF1GvewuyAsXJnUPsUrwn9TZjMS9uVbL4tsRPmMW7NYk2Mvg5lpp6oSveOJ1e_E4RRJwLNcFKZwU0Fk7y6cnrF_t9DtroSLe6LvVUYiiQsBROw5VKTKn9bYPVcL8dHZVkVnwu82yJg6xDXzNdIzfhV5KeIeMjQ41Mq594v25klNs6..dD3c5LdIh0stbXQzqbDpmVjTa3D6Guh1LQ7Cv.EpA1gtRDjO_HYM0wPKzHL3uDilNRkSExfDj2I04U1D9d9Vdk3sDttPAy67QnDjXjncgblpyJJqrjGwy5p8NNgv2rvn0yebXUmncIXRic9HZLk6KL65D9IVYY60sO_Dzn7uvAV4GLP41SnGVy1jzBYtXMnXSzq_n4UfOqjHwh3Dn1iB91OclkkZRGlseqb7x_rQv9D5_vmDuEeW3l4j5NNk1VGFXKnlBcOFk2a1ruafgTJQSmCIvUjC2ANfYiHjgnYRnQVQy3vaz5cfcUrxRh4icZGxOkX_EXbtc2VbP7UgJ0RtXBA1dBC0U00md1L3T.VyX6lMbC4aK0tVAAsb.PMTrhYmaOFKbF9HnfP8ktIVBwUD9gPpNeScwuJxovuudrYUxh5ICGvcxTY3wZi4HsMFD1OTwHo2VB.zVJUOXPYO5BFJ3KSCOV6kPletPhjyPODFU99b51HwuYPXK.9zAPoPiFLVrMk.axN0BDJq0hpiQG0UaVypHxIvYoCWkYZDb.IBAsLyNkUbg9N0Tq1UXw6A1RRH1s7Oin2qLwDkN0nGsaXbaVIfIpOp7P4pdbOWAwzgWbe0w8l8suPiFVSOYMBjZ9ROve8q0Bqbj1ymTmMwuGGKZAbx2F0Jq9Za2FSBoA7SaqN9jFrScm7jMkMa5vy_hJOHC5_aJkTSR8tPyOMzi9b9uO4e.TeLpt.RvVxmkIZW8D5Vpg4ZLMLPkFM2pf.8qeXg17e2wEBdNnLLXoEmDr8MY0orMvXYvmLDxbgU_jcdwtZ4WAexe4jZ6lRMk6IcdOaiWXPjsBJb9DdmYpFjmRBR.JjLsUB7s64q02EP9qxstGcGvF03s7ZiPlCNx.jV6jZj8vl2IHiKVaQb4taeJpaHxDHtvfdhesOMQUvw5NYJuuZVwoaPpUdlat2KozAa9b7NqFbP5h45nJETQ7JsT0bEfDda7pTzCfdG5rZq6m7ZHWQFC9U7X.3xv7Z45IKswFj0u31.oZHPoWLdjVcMb9hmoXHch2oB0_pIOsYeCs4RO.MNzOUs19WgpzUUVqt9pk01ZxnLuqb.YKMYnAm59IcDAGZrPRwZQregsfI6uEIn0b8CDZJSxucPJA.Vjib.u71OqsVKoD4Xjamp1Xp_C.qRe1iCOerH3g",mdrd: "uu9DgNCCRNp2IaliKnPZNA656hM9JhXiqvMx48.7b1g-1739239728-1.2.1.1-t_6JZYgw1Nf3znhL_ZZLKvJ.d9EDSo6YLbljc4QUhkzoncOG4Q8gaos5Tsl_3OHIAoYv0uB71xS8oz8MIF1eGjxM5LMW072OTJXj9Xrp_W.na15B8ziamuWxGvgg21h3K8DHVPHfdKJo1LYT3YTqSL96NFFC6PP2nxGkrahK.USZkW6DI2FBZ6Nx3YJ7UTB35yucwlo2m_ffvsRACKu2MCr89p.n_j1Jtnl1xa7S4zK29EliwW_YguUbDI4syIl49IGZoS.7jROsUecYICFJHPP2quG_vh9xMN6mbt1wiffL1.e1zhA.vCQDNyp_VaRRydCOexI_BJ.V7_LIw2W.l77uL2a1noL1_ImyRivT7Z2Hc3DirVVjqVQSXC1TqWy5wHgkb1UJLJKQjD6KunmRWKh25l6jPbTgfXOCbbxtw1xck0kP1Hvb5te3HA0UT7QFpubHOp_lYhiWhqJpYlFuXd80WK9SupSsWHKvt8NX6NMM0qojrYkn4d32_k8iGqZnVjW4P8V5xnuO3re8xHf5UVxA9qUXVpKkztQSs.W3zaL.DIVR1GIO9qMWU40wcycAeKIcN1V_di0k8rbqtGzSbd2175gBQL56t36U4xaBoqCzl4js7NIprBK4bKeCRkQUZa2iEX_gR.8mVFrBUFRiEAaoI4R1CGlvr08GpUzb.3tSpFXYit.O.aUqOk5nfdY5WzJEP4cX.W32UCT87.Oj6iVD1Kvq_.aHoJMEFp7kmq9.K4_73Gf1OM89xAYyeeDR9ky6B0Yc15TKhc61FUdOL0iGd2zF1mtTeHjWpK2GCbH0yvIBODN2cJdrwTE7jc6RNIhHwKGe1EuElRGv4a8BqlnWUfxk4TQubbMLggr5MhBU6KLXQnQvI1fVhCJ7QuZQ0RWKURoxunijhEYuDgXM1U9BoIkcGk35U8BhlqbljdLGemMkEZ0q6EahtXtGr7ap_UlECvHxCI2pd1RXv.5jKvRqgMZeTic5_c.XiLbEpCpLAfTLqANWLNGeN_z8efbRrCRj3vLHci1sD03ls3C64cNfi2F_kT2YLwQHHP3OIXUvmVhgLyLHx1B_AYkdMjWdGtiv7qf.y5vD8luRwYChhtwgIexyfeAilYyeGuL9V3PrFZmNXUA3tOM1G.W.rqbCyIKVvIWoYrXUZEia.TXnYGfNZxCyWKvY9lB8VZQR5gB.NN9Hj0knjfQy_0mjG7pAi5G1dkzdTKnXdmSlynG6G8Vwjt34pCLzdTTAsbNIdFcvShxQqLRNx48EGFyO403iJP1yYIghSbmF7KcLqMzOkseFO6cVyYpr9Ml1NxbBx_WGc7H3EqzUatP4s.LI.nkgepE5Bs5f653sKq3P3dR2ivdBjRmZzRPvXFOxsO0X9o2b6BjEdndvXg_nqMtP6.zY_4.tvm2R.h8EHdzbVBmET6PoYYUTrAZ8yL91FzTqfXjAvbvD7nmPtgTGqUfdP1VvbDIRjnPUQT_YIdkzKlHHACYzmjG98XSkTbVfUdEX3.6JSMtA86Q_uVDR1g267UVrcejpNW6QRjQ5W5kR4XYCi5HmjEBebM7UuvRd3vfKSrb.fo7kh9s7P8knwtTOHyMKVz3fXIJJWs17d.1fgfjuA_PfOro6KxvudKlzX5._JKHfyZ16DtsXkoX4DaKpuzCj5tduqc4xxF6_GJu6vr42k2B.SeXu91raQ87Lhjv27IDkpXtcqePUcZMQSWQaWqqh6M1LXuCHU1e5PGGwhJlRn2VTnCoi5RzocO2lTuaVSmc7W0RWLnaL7P8kyWldM8NOauM51erbOMf1Tr_Iqth_TlSCBacBC42HSymqXEhRl6u3EFVI7Pd4v3xmFpUJ2pb40HCZOBFxNqX5k3Uw.Z3xtw"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100cb0e88143937';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\/727600432028?__cf_chl_rt_tk=KJFqdDhiVwCamrojyJnOIhpf6dtteUwFl13I4sWWpw8-1739239728-1.0.1.1-fcK4dwryiNL6W5bNm6O8ob3Jv4PvuHIzVVcznSFyX3k" + 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