{"version":"1.0","provider_name":"ECOticias.com","provider_url":"https:\/\/www.ecoticias.com\/en","author_name":"ECONEWS","author_url":"https:\/\/www.ecoticias.com\/en\/author\/econews\/","title":"More than 120 years after Marie Curie\u2019s experiments, some of her laboratory notebooks remain radioactively contaminated, but France\u2019s national library says visitors behind glass receive essentially no additional radiation while the originals require strict handling controls because radium-226 has a half-life of about 1,600 years","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"iZhVn6RVv8\"><a href=\"https:\/\/www.ecoticias.com\/en\/marie-curie-radioactive-notebooks-radium\/37138\/\">More than 120 years after Marie Curie\u2019s experiments, some of her laboratory notebooks remain radioactively contaminated, but France\u2019s national library says visitors behind glass receive essentially no additional radiation while the originals require strict handling controls because radium-226 has a half-life of about 1,600 years<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.ecoticias.com\/en\/marie-curie-radioactive-notebooks-radium\/37138\/embed\/#?secret=iZhVn6RVv8\" width=\"600\" height=\"338\" title=\"&#8220;More than 120 years after Marie Curie\u2019s experiments, some of her laboratory notebooks remain radioactively contaminated, but France\u2019s national library says visitors behind glass receive essentially no additional radiation while the originals require strict handling controls because radium-226 has a half-life of about 1,600 years&#8221; &#8212; ECOticias.com\" data-secret=\"iZhVn6RVv8\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/www.ecoticias.com\/en\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","thumbnail_url":"https:\/\/www.ecoticias.com\/en\/wp-content\/uploads\/2026\/09\/marie-curie-in-her-paris-laboratory-in-1912-768x432.jpg","thumbnail_width":600,"thumbnail_height":338}