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-9512370468-gov.caltech-edu.pp.ua/post/740901767324

  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-9512370468-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fdede44830c995',cH: 'w4yAq0X0ra98Q7_pndT_CopM2FFHiauMxYsqs2c_vmo-1739209697-1.2.1.1-PQOII_epkKPddTfOETk9C4_WYif_qRbTCb5zSuRr17L9o88be6xTA8ux.NtTpMmu',cUPMDTk: "\/post\/740901767324?__cf_chl_tk=_w.m774p9H_7bMz7xsFJEHDERHvLrjF1XEXM7gRm2qM-1739209697-1.0.1.1-MstPqLwcySe6CQTG2Hmf9f15ZoU1OVwf_zd9FehRwkc",cFPWv: 'g',cITimeS: '1739209697',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/740901767324?__cf_chl_f_tk=_w.m774p9H_7bMz7xsFJEHDERHvLrjF1XEXM7gRm2qM-1739209697-1.0.1.1-MstPqLwcySe6CQTG2Hmf9f15ZoU1OVwf_zd9FehRwkc",md: "KSCRkUVIG1eufjGi90127uHdZkj9i3zKgRbpsGQDjPo-1739209697-1.2.1.1-zZ24bWovk2IT0UdvrEui8IpQ5VRqX67FNKQ7Re4Citqk8frvn10GKhE1mUVdzwJEJKaOlGmmWx4Rw3o1NYe1j92sVk27QsQPpXI28zbhHXF2gm0F9SgGcKX9pyibMy1N0OfNwL7qc_PYRxxcgTk7WiPKT4Ns7135WvjSLgcn.QAUqmK9BKGyN6MNSV12iS_B58dh7CO9d6Ek16f7bPXpPUdxBx85fUlT8X3RXfSdYZNdX5NUS.9Btb011jIg8uW2AFoEXIALXekwvbx6k4G7bJTtTJWOTAN4RL2tgtLRlPfbfLDaJdAI4ok1_sa1iU4dd9hNtiTvyc1jZKHuusb1sDY9HBhbVJqumaOA9lGyLmLq1nlt3_7C_Mh5ndzgXpJqIetqS63ZelvIpgvQF98XjACQKjz9Y7E4GDt0rpUseld3soSoWIw6x4A9B.aSRHe1Wnq4xj7k4F0PKVMzDI6lgID0aFd8JJhmNmHj6Le1fAqPsKyuHkGbNMdBxtLfNaf9S7QvrSfUnWgrWLhjd_CnOMDg9gyerSzLebYBVwnpJdKlsUCyYfrJBF1u8bM7dB7fnFwakATtiUsO22_ZZPpEW854P0SJ9HfcDwUnkggHGItTqAw44xSN8l_4iXRAmGVnBrfzrVP_d3geLAklCVwZA7tmGBMqXAYSDfr0.j7sahdPGWwExQfOf3Y5M4dm.zyw3Np498L17YxbD2.nQNnXteEWXwFkM2BgiKhtUW2xYptBcC_OqXbTd6C_79l8YjGaWIS.s_.P87UUbibX8kbIRys8bxqqFBbn3IicHkKG8WlMVCf7xjCo7IKtvuz1bSst4vcCq285W49HzpnnD4lJijG5F.F746ZZ5DrJ95wULYvbDpSWZs2D1jkYAOzYOCZMcR2zrO5BIFTPIqo2NkTXzK2Ku4_9_QjljEGOzfFhw7lUNTSkcZFjto5UYpTIO7F0gTqWCMDkRLz6rszEEBlqv9wp56dG.7Y4fb9LminjsGuTNAEp4Fiuqq4typzR7STn4TcKmOxqcXxLjFVFuOZbalmyCwh79_RkgLFlPV.ADIJ.346DtqoHVRUf5GzAsztgp73k2yG74GLLT1ABREJzEDgPudacgdcQY59QlnJJP4AogJIyz2OWm7H5gKIINHcnpgJZC3.hNP8aGhDzkvy16oRiWi9s1iyxLvSzWGRLpB2IidlnoHZCjyEO8OBssYKwhS24r.5VREiVEaB5zfqWiKzXBZ9_VfGNPRAvSQvhLZQRZ4fYTc9vjxx6JgpNHtoa3pzr2mooDOtRolQASdUJHWE50tQ9.fpATXAYQ7oeMfoSejFi5DE2m2aAeDnCrxJsw8YRJlrubn_5KQsmcHAr7810xSywpjM9iCXyuAH8SZpMKk7YxWfUgKmeGftt8fya2aRz2XHBVjyVKXme7OqC1bREE7VZJj8.t2bq76m9RD0gxSX1aGMWs3Xsc4SGkNe7mcFfSguOgQDdxKzUpc1W45RtMcMMN92.EORCnnPigRPgE9BEUL.FvOxXSPZZh6DonL6upl5XL9NIpeTG11NW1CqQC2OPuGpcOht9lKyrLfOc5KRGjzYLhdgg_oGVisu9oCcZ2r3M_NMXHVY1Zb.WCfr7s4Ji.Yr7OLje_f.uPmErR8WPvyiLjon9vpEBxHw4oqramOIZogYUEoytKp7Z3c_jFFH7tqhnHRuFGFcgNjlK__87T3viq.Y5gzK9elzl57Er8Z254zCn1ArO8V.oi6O.yGBQJrYt3.8M7V.e.F57D08Po8df1QFgLsYPcZobO6Db3Lnug1w4X5EsWjaNENRKLpXqCLaDSdidfNpbMMCxPMMb.GkMBwk3sZKAo98EqWkkiDQ3qhTop1RgFaX1xJY4Emo5R.fBnnpEuh3mRNxkG.rxv03OCWxhJCsJfR036uHJwgFJIQQeGBZZeNmit7pL4RQDEREI1rZEzXAYgkOJDz749M6R0ffqQoYH.PSq95nDVQnrjPSkszBn62_V2Y6uD62FIAkzi4Vj0ZEeR1Gjm0l.xoSy390gnj_upWME1HmfYcFxv7l.yrUsl70UdPsjU8ySW762aJljK34k9tOa4hRs9zITYfDa2rJaYvED1u19.tIIxvptdSOHtaool.wPtSFZoysZ5RRnmedKeNkxbYLIVFdyOqXI.FHjTyO2IVC0Vmd.bHskYB2LvoKUoTyG_caMFo4pJ0vucnCIYQe6HulMZks.9tkLxTZvCHcObqzusO6DWX5PACeWzwk4Ag",mdrd: "lsene1Hzz1HbQSpKbHpaP5rm2_c5uDO4xM.2fDrQ55I-1739209697-1.2.1.1-ugaU5wETr5WBIKZGE.5eSxR8yfJeijdnOYP9GxS6npEDhPABIHuEKfBJgPaFY1utcTL5Ulp2E5fFbP.wzoT2CMNIUFQ9lXvVWEXhL0GIp8LyNBqhrEqu67eKILxoHGZollPLJmdeh3xNjpohxOY0_jwqzJkKSmzY1tkdTYRZ2j8bUjJDbR3qAaQptdaDjquVpFz3PvZZrSmdgsz_8xsKuVI5LTea8tQRStYqD31HYF8V7VF1.siu0AkHt1bNJh_alMqSWmAJ1AMIbZocz_MQwq1k61_xS4AGGesIIF76Yo0xXQD2O5XF0RHhU5S6H07lf1ZJcE3Cgf00AetphlJFS4TecS6.9T7pj0d32.lLIIVkTf0tHiJQjwtjw4DcpF6ssbafsOf7FAuBzHW8IDccis_CP1pz3o7H9Zm5nx5YDypglqaR9fDbB40iQrNu6cHVn3DnioyWtWBISeJE3bq3NoSFeQS_nedUPz7R0l9SPqVIeDDQ8VgPBiciMdauLrYHItLGTo5tMzV2pdDOTgI.Uys0s8V4NdhH0.CBAxw47fNT5mRHan8hYUf8tb6rR0ZTbtY1zoPMOAjkR8IvFp5o9fmh1ptZC82XboNeP5zfUX40RRRsayXsCrAY643MCZZsXLpLNoNsDs1JsTdY7Hxc0T2tPSFGHtUvcvg2ft3iS5LtGI64XguKR9QEeQHtv_8gZqJYNoxYhCvvq8K9q_8UJu1Jzf7bAN5EyYLnmlBvO81WuBJf98u9Ls0cv0P09QYu_mIWGwE0JOslWQJLRYWUSiHGLSRGTUyo8cSq7PYApATfFu_6Am3U_WuNQGJcUF5GGa0x8NZGHtON8ic4e2eOG9K8ExmVcz754GthH.6muWulsJZS95nOAsKS1ROqxjZ8yjIiL7wf7VWL7hWqFML8tXwI44u4AdRiiQI9MmhWlYup8J3vdqu9425uFAojmaCoVV5mO7PSoD0k8Y9q.hJhUSce9ZGE5mePnQUevgJo_5Ac70Gb5HPflnPqitOTGMiTF._LmWx0wx8vAjRAA2rM72nw2Lj_7oVr8PYJMm6n7K9XS0GYy1I7gJ9Ijbjw_gRGNqSIikO4OzNv_8e4otbMHLdsKyu61SKwqkm6c6ea0h.aArEs2qWbN7fmdSyFcSfeVC2U.soCEOes08lBkJpDB2FPCFVTmuQmVYGlJh9tntQtreHkO7E8iNONp0mUWiio5vSw5zFWgGNIA__r52r.YhwZ.02aXeMZElEZVNV_1KeQIt1VhEDyeawPLZnp4RJHq0fF.UA3ARNspHU1brTgmub7lCsKllczJNdoG0FXaMgOgTmJm.5uNJQICBJ0.ezr8x.1LpggPW8.3EuoZen8aB5YCmb7sOhGfDzsWCTqftlGNCm4EePHbAnHo7cKWeJwXBMNu2UGZ8O6QArC_.vyH71xhEbcCh5LZLHJGHT.h8HOeI.gzUJBDseFEgVzgeFHkMReV.r_hnGexNUmdafin.lHcItzaCBViFsYcKPuhW8MNhG9v.rxq1_QB6NqH4RHJQSW7mvyESu3wjmsKZ39UXE6o_iPc.lQ09Y4Ipq8o3EW5YIz8pw9vuaEF.v2jqKDTAjZpekFr88W1LFI.M9YQQeg4LKLbZLzb4S68hK0RrAizVLs6_fD0Q1vqxi2Oh5fg9vQu7qDUZx6XXn4NFRB6iKcFp1PI33Vh.bN7m4zP0Rzq5g0EOdonjz7udw4OAFhW473Tz8itNdHOYMprGKBOkjtr0trCJDYpcPeLO6y9MUilqciruA33pTg8MrR.b5YE2Zf2HZGa7RHoatQ6NxHWhL9uDGVKcjHPme5W7mTTM3T3WywHZedVJFQNJDlj2b2fwFrR6a9GEmxwcyXmMYX9g"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fdede44830c995';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\/740901767324?__cf_chl_rt_tk=_w.m774p9H_7bMz7xsFJEHDERHvLrjF1XEXM7gRm2qM-1739209697-1.0.1.1-MstPqLwcySe6CQTG2Hmf9f15ZoU1OVwf_zd9FehRwkc" + 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