Featured image: Markus Spiske/Unsplash

You might also be interested in....

The extraordinary story of one of the greatest feats of arms in history, when seventh- and eighth-century warriors burst out of Arabia, established an empire and changed the world forever.

Learn more about the increasing role of heat from the Atlantic Ocean in melting Arctic Ocean sea ice and the potential impacts on the UK.
 

Space and time on Earth are regulated by the prime (Greenwich) meridian, 0'. Before the 1880s more than 25 prime meridians were in use, resulting in problems of global measurement that engaged geographers, astronomers and navigators.

An ancient eternal fuel, the highest snow passes on Earth, and the last of the great Himalayan muleteers – told by the only known westerner to travel the entire Tea Horse Road by foot.