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-4180326579-gov.caltech-edu.pp.ua/post/4180326579

  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-4180326579-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9110c9b29d4cc596',cH: 'eBsJTSmMJWEx3EycIAmy8_yKRHyr3z.H7LKNxLSQzIc-1739407444-1.2.1.1-pqB30p3KqfXrbOU78oLWHxQTXy4e4KwzXcSxSz9uQ0R_.YinFymKG41QOfGNC0oi',cUPMDTk: "\/post\/4180326579?__cf_chl_tk=azutMAUG1SjUDMioAGesUFP9_xSXbaO8ne_5cr3DiXw-1739407444-1.0.1.1-FwySIRLVN5XPLYgCJAaG8DqcCkZ6i8aKykqN9PVjf8w",cFPWv: 'b',cITimeS: '1739407444',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/4180326579?__cf_chl_f_tk=azutMAUG1SjUDMioAGesUFP9_xSXbaO8ne_5cr3DiXw-1739407444-1.0.1.1-FwySIRLVN5XPLYgCJAaG8DqcCkZ6i8aKykqN9PVjf8w",md: "dv6lJYf4SwLIXq_Gq.MtGsqTWNcto1WG172.nV4ZhEE-1739407444-1.2.1.1-ztzdldTXyGZVQ1fxOUwF2DmfXr4J2dhc4WT9KrFXsm27aPKR946NVGI_PDWWt_7lOmtCvb6WBsGkY_ocI1wg2SZiDg6uqESAALbiyzjUp8JLH4VP5yibiF_C9nL0qajfm4eDJW1OdnJmEzMzHiBlDCiR4jwiCF8EjhWr8UwUc9GGkUfd.Suee18Vcu3spcHUcADQQ7hOwJqSbZCoywoMIPvx9BITrG3jdGs0kNqpGHm0.AhgR6Xif.69cCv1hhoEA97.HELIrZo7XRj1uLxOwJQCXhqCPeF1x6MZ4Um611.UiXtQS83oJPhkIEpJqD4JEOP1HMMHDbt8qKm34cwMf.gTwgdK2xk6H3FlioDBKUwbXneu_KppzcOKtaZQiubwSh1AIh0Ic2hGr7sxaHAxHj5mbxPpjT3jdGDSsBnqAZTPxjxjSBNGrt6GFNV0yavgGqN7Sc5z7Gto0PgLMw4b2hLLs7NmkMxID1gxF5nzLf1sXy7Ec8vo2OwJWfFFE1zxgzmTHNKGYrZLb3qJujydG094NVXqQDE2J89YV.f8UYwvR7OqNXTv.rs4oxk9BovTJD2RSDGZyfTxL2M4Y3DeEsHw3rGZNFxev1_sR1OSqG_bssAP7Uk40Rk4wPFNLd7HvtOSj5Pbk4s5flGCXoGzJtSkX4VEe8LGlsb.z2ca_.c9MWcyJRyOJni9gnDpNJKRp6nozDst9srwW5v8aOiR4SfP_tXTtud08BD9omcXXGa8m6.5bxLuXNUEebP1.CiMSO2uICD5Y08F2SfVXyzlIpqwRlBi3fIrZbIJHvFH452VKfY6ugcXMvuZUtnorn_JUizvt3qU53nnybFzdS9Rfa08Ci2HGEu_lw0zszy.YEaBh0btk0fdmaIsDriMQQKSLAgtjOLM6sOsvdSHcS1ieVxj.la7GihL464ZnJIS4DKvrs1LpieV1wo_sSPt.NDfh0PuCIc92UNtScox9sK.EuO9oHdNG3cdJ.RO2l0K0aSsSC6rjfwMEYDRGBYDa1eRi7Do0dgozlvKetM7OiRpxE5wp2jZJ29tQPrPz.7utkEh9W33Gcu.iayyx575UmwNZX6By61Au9XI5bBM53PzomIO2ShdmfShuHd4F2PUxHRv81dFRUEvBr7PkYRVXa41PyWwqmUGcD0tcclObxYSTdS8gHDtOK6DVezsJ5HxUk7FBg_s4gq8vHRYF0wC_M00s4VNuvt_destYRRT0gcoF14_dDnBjk7KA2YkmtboqlhKm_vb96AAFDu97Z0U.XdMK_3VhMZ6dpk_PkqCk8X0Pt3uAJArm0P2nmwnX41FopxDDtIYkgEjK34fpIJZI4ALyaqPzL48hW4NwLMQ8dLLtXv9tnUpTZ50kvTyJMvIkEL6ku1NFjucTrBAdnrHeHbco1hyJqTdbxbBlwvCp6Ilhw4Fkm0gLpVBLKndeWel89OdlciD3yTQ2Ak3HtMwLL_IPi.Tc0Gkl6lJAzuaY.gZuHEkSmSCIDVVQAEW9_Lp19cyEguoGyyDEXFYmJG.hnRrZ8zo7HapjrWRWHAkBfOLWr41buSdOmsQ5wUzDUOifuj8h45_86ttkdJscFrXVGs.pGkvdznd0e18Md74RDaO4yiZQwYEXLQP0E6nNg__X29nH._aoAD3J_9EfQ.qVVD8Ums5IHhR6yWEVYuxamIKgmLmNQGE2xqWj4vgeyOCK4rg6Z4Ri3LDyrbMzQZybEKW8bRoxL1JMQCHnbT1heB3lSbfFHphYoCSYFCpJjtT9qcX_Ossgbftlb.y0ZMWxQr_ztbf_haRwqm14muWUPdEQkHryt3bOYximULBoGXqPEsgM44WUIdaewFxHJPJGZJpwbbxoCUYYFGyWXcRHRYzv2tTgNAXEYYTqa1xKzsfah5cwdZu.AUlWJmusfcOy6QfSF2sq3SG_z0UTnwWH_RuGcsG_7Op82IvZ.mm2P3hx.JbqmWMeFVkb1w8eYatnpFd4ymHUVs4ILBexA7ps2Y7Dl0lYfnL3FnQ4yvaaQP8vT0YOx8FNpRuHIlLrWdeXgBYejcBhU770vH9c0BdjO_vQ_d3sEQZwhOcCkZcQhy_gNcCwOcpEUaql7YENkxrpim6_mF8GKleuOnSLCfX5Y7MyxpDHnOfeyxMJdtS38kKhlF2ffqSvpe16fyJTVAA6GqXq1HhKRKX3KEOKQO9E2Z4cEpL42R5Ja9gwbQnfWVq9ZynwxD1L3YpzpTTp80jW8cszqgId9x3uAuyqFKroVeqAA",mdrd: "RR7qeM.nrt99bQM5pC8tWkyMsVjxjceDnw97VjPDL1A-1739407444-1.2.1.1-2hwC7W3ab0ql_d6syqOCdDv0_TOuwU.9Ob2sdRtPCgI_X5Nj7hrXATYk_jchcdBtzCb2jolKTqAQle3jC7DjlagsNvnhiPP2JgTO1yeZbQ989EIkPogaemQRZgmO4Xvz1Ksz5juGy6FpsAze50a0FSh2Kncb45foHh4Oe4vlyx0gfoZnNm2O9Ha3ArlB7lEm9YiMGi5ABcQFUxHtIYzdJ7iec_6HeKGxwJy2CWssqxxm6WUQH7mSLrGeuKTpRonQTwWi5wTEwYC2wCIO0qa_N_MEpLuWxhwqJDJAF78op7ElCF4cK7p_kFPvx.MTkgIO40KdzyLpYzkq6spHK8B1AY.th38kY8YExoFuUmQfXvxaatwc1IzMxy8BIkwcgl0bv.xqeCA4kgLfO7yMQoPe6GVnRX6qTL9sgMTnW6G3k5GRewqeVzYvoULzETsv4mucMhwceDpaOPKnBWUQP_a9ErUCC6oKLwmkprl5Yz6bjwd.6241xoTn06zZadMBBpC77h6vxV052os8Bm1lAQLemCdltGIrKUVYiZqtF_nt7HHHVj718tySIsZd69aZX3y2_kTFcXSdZ0ib57DLRDxhNkA8Y4JL5RfO4dznhtwgMRdrAyAJo1lTKbEO_n83jTWGklptXNEXN6MyJdyIks_GIy5Mqsdem01bYuQVo9Ys0aDqaS_DSS2sPEB__S8J829urW0UY4mIOVrHs.Gwii6W_hver9SrTC1bkT2gCT2v6QQl1wBIRE9voRdBEBGhTUaReziJRUYAW9zkGbO5o7RuIBmsyDJh4IEwKIZrxQTyikRnltLFA_SvNB0fuubCbR31X1j8IBNbMkZzlbM6iavutQ87A4ahOPq89rH16GgmwjTHE5O7TCEQfiP01KhsbxBdjA2OH0xt9YTyerho8442ai.c_qDXHC1W1njWfe7qbBjbGYMaowkQm7us7PsizsfRicx.U5QOsCOiaseG.1bm3gzGU7yWCprBK5RD4d4UYVBeX3m9ERJ4Kr2von_jks3_tpuz9QRkIK0MKnUkylcOKGz_XIF3mUXluHxVMydSWPIEbszKGIKVK0vE5TkvbW0pe2IpyoMnsEUCLvV2Vh8iXp6Zqw7A4_3_y.goS3SOP.he5Y6CcmrbxcJUiZaz0ZermfnRoBi2HKtpYEnbu7slmzOhLvb4IC6.DiSCCt4HyMSGCZXECd0PVzDLY4pnam9btldOpA2s6.Tq_h8RCRyFEZT78MILgkTPAATSKq34fs2Qt7TirRmcG8piDp.KAWOCNPRUDDbbOXPhL7ObityLhsFwDzuqi3ZNbqC5D2Bcm1WV3QvNsIuRpH7YqKBvP9wDxbrPvLIhob24ekAnxuBN2azxPmZ7oJwKyy.u5XVtZIcwFtTCAN2wOBjZLx3W72UcGQq_NL5qW.TeX.h.JyLkfvtpCgXkahvzCWnP..qHcbt.._qGBv4mQlJ.d3pS_03v.Giuaya06CvKzOMVnGAWq4i0bX0bCWeJThfHLkBVRJzvw40PRFlIpehVrVA17pRgcsVzUznfpL1jhBpAnMfoJEq.WWYntwuDNHgtHqBwQuKJR5.c_v1pU4cEF614i5eGq_1bCt_Cm3_OCqQ3wA76GR8uCbrMkaGOLzz_cwYpVLl04jeDD7oQQ80Xz1tpTR67RRO9T7yj1LkFEdC6k9t6pPokX.B1W0lL2RZoAvkoAe.Wl.p_kmxbIAJ1Y3E4jKFQKa7KpbzsxGwgxR0VlQgtlbTIW1iGhCodOZwzDdV_h.vVOrXmm7ZaKYdCxz_.AoT5N75cKN4zu8Ob.MxQV3Wdk2tsS8FhmORtWNehzU6SYPYOuExpd4MAd_TVUKi2q0bo"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9110c9b29d4cc596';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\/4180326579?__cf_chl_rt_tk=azutMAUG1SjUDMioAGesUFP9_xSXbaO8ne_5cr3DiXw-1739407444-1.0.1.1-FwySIRLVN5XPLYgCJAaG8DqcCkZ6i8aKykqN9PVjf8w" + 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