Various scales and charts have been developed to measure everything from the pungency of peppers to the intensity of earthquakes. Test your knowledge of some of them with these multiple choice questions...

How our bodies work is so often a source of fascination and bewilderment. Test your knowledge of the human body with these multiple choice questions...

Widely regarded as one of the greatest scientists in history, Albert Einstein has become synonymous with the word ‘genius’. Test your knowledge of the famous physicist with these multiple choice questions...

Country code top-level domains are two-letter extensions indicating a website’s relation to a particular country or territory. How many of these countries can you identify from their ccTLD?