Manufacturing and technology giants Samsung, Hyundai, SK and LG are examples of chaebol – multinational Korean conglomerates with labyrinthine ownership structures, often controlled by the founding family. Use our interactive graphic to explore the relationships between companies in each chaebol Read more

They cost billions of dollars, symbolise economic power and are photographed by millions, but the world’s tallest buildings also compete on a lesser known measure that pushes the limits of modern engineering: elevator speed. These ultra-fast lifts can reach speeds of 20 metres per second (45 mph) and feature technologies that use heat resistant brakes, mitigate excess vibration and adjust for air pressure to prevent ear blockages. Our graphic shows the top speeds of elevators in eight of the world’s tallest and most famous buildings, and how far they have traveled since this web page loaded Read more

By John Burn-Murdoch and Gavin Jackson

In the latest instalment of The Baseline, our weekly feature on sports statistics, we looked ahead to the ATP Tour Finals, the climax of the men’s tennis season.

The tournament is played on a hard court surface, which goes some way to nullifying the relative advantages afforded to big serving and big returning players by grass and clay courts respectively. But where exactly does hard court fall between those two extremes, and what can this tell us about its impact on the playing styles of grass and clay specialists? Read more

Our new unemployment tracker shows the latest jobs data across the European Union, including top-line figures for each country’s constituent regions. The most recent figures are for September 2014.

You can also download the latest data using the link beneath the graphic. Read more

The current Ebola virus outbreak has claimed more than 4,000 lives in West Africa, as well as one in the US where the victim had been visiting Liberia, the country with the highest death toll so far.

Our interactive graphic tracks the outbreak’s spread since the World Health Organisation first issued a global alert in March 2014

 Read more

By John Burn-Murdoch and Gavin Jackson

In the latest instalment of The Baseline, our weekly feature on sports statistics, we looked at Serena Williams’ dominance of women’s tennis over the last decade.

Williams has won 17 of the 43 grand slam tournaments she has entered since the 2002 French Open, and the reasons for her success can be explained with a look at performance data for the top players of the modern era Read more