Development

As Japan’s population ages, cities like Yubari have to choose between finding new ways to attract more residents or focusing on managing their existing populations.

Late last year, China broke its own record for the world’s fastest train, clocking in at 281 miles per hour. But in Japan, testing is underway for another type of train — one that levitates and can top 300 miles per hour, showing that the race for the fastest train isn’t just a competition. It could revolutionize the future of travel.

Sitting at 12,000 feet above sea level, Bolivia’s La Paz has the highest altitude of any administrative capital of any country in the world. And it boasts having a world class public transportation system. There are 10 lines and 26 stations. But this is no metro — it’s the longest and highest cable car system in the world.

Ocean energy technologies are catching up to wind and solar power. By 2050, Europe aims to tap 100 gigawatts of electricity from ocean waves, tides, currents and even salt gradients.

A US shutdown of foreign aid is starting to have devastating impacts around the world. Health programs and even military assistance are now paused in many countries. In Latin America, some fear that the aid freeze could hurt economic programs and encourage more people to migrate to the United States.