Hiking or running is the only sport – the only one I know of, anyway – for which you need nothing more than a pair of shoes. It may be true that, in most circumstances, you can find someone to go together. Sure, you might.

If I go hiking, I can go on my own, or with family and friends. Hiking alone entails a healthy dose of strenuous exercise. My solo hiking can often go as much as 20 kilometres' walk, double the usual distance covered

"The world is driven by forces that cannot be measured," the market analyst Morgan Housel once wrote.

This applies to so many things.

Imagine a world where every decision is made on a spreadsheet, where we simply add up the numbers and get the answer. That's never going to happen, simply because that’s not how the world works.

Ask the British physiologist Archibald Hill, and he will tell you this is indeed not the case. Hill, who won the Nobel Prize in Medicine in

Ask anyone what their favourite animal is and chances are it won't be rhino. White rhino population is shrinking. And fast. It's now endangered.

Ask poachers and aphrodisiac black market customers and they will tell you rhinoceros horn is the most precious Viagra.

The maths is hard to ignore. Having been decimated by poaching, the northern white rhino population is now down to two individual females. After the death of Suni and Sudan, the world's last two male northern white rhino in 201

Deciding between running and photography in a foreign city is never easy for me. In fact, I love both, and passionately believe that either activity is the logical choice during good weather.

Before I visited Xiamen this week, I grabbed a Lonely Planet guide to learn more about the city. This seaside city is the crown jewel of Fujian province. One of the highlights is the prestigious Xiamen International Marathon held annually along the coast offering breathtaking views. With its Elite Platinum Label rating by World Athletics, the route has become