{"version":"1.0","provider_name":"Little, Big Science","provider_url":"https:\/\/www.lbscience.org\/en","title":"Try This At Home: Measuring Earth's Radius - Little, Big Science","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"4ANz6qjt7A\"><a href=\"https:\/\/www.lbscience.org\/en\/2026\/03\/22\/experiment-briefly-measuring-the-earths-radius\/\">Try This At Home: Measuring Earth's Radius<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.lbscience.org\/en\/2026\/03\/22\/experiment-briefly-measuring-the-earths-radius\/embed\/#?secret=4ANz6qjt7A\" width=\"600\" height=\"338\" title=\"&#8220;Try This At Home: Measuring Earth&#039;s Radius&#8221; &#8212; Little, Big Science\" data-secret=\"4ANz6qjt7A\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\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\/* ]]> *\/\n<\/script>\n","thumbnail_url":"https:\/\/www.lbscience.org\/en\/wp-content\/uploads\/sites\/3\/2026\/03\/en_meme.jpeg","thumbnail_width":2400,"thumbnail_height":1350,"description":"In a previous article [1], we explained how Eratosthenes measured Earth\u2019s radius 2,300 years ago with impressive accuracy using just two sticks, a shadow, and basic geometry. But Eratosthenes\u2019 method involved two different locations on Earth\u2014the Egyptian cities of Aswan and Alexandria. Could you achieve a good estimate of Earth\u2019s radius, without traveling to another [&hellip;]"}