Why this Austrian village has its own metro system — it's less than one-mile long

Less than a mile long, the Dorfbahn in Serfaus is also the world's highest metro system.

Image: Kommunalnet / Seilbahn Komperdell GmbH
  • The world's shortest (0.8 mi) and highest (4,680 ft) metro runs beneath an Austrian ski resort.
  • Constructed in 1985, the Dorfbahn keeps Serfaus traffic-free.
  • Capacity will increase from 1,600 to 3,000 passengers per hour this spring.
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A map of Kim Jong-un’s slow train trip to Vietnam

North Korea's Great Leader would rather not fly for his second summit with Trump – but the trip is also a political message to China.

Image: Dhaka Tribune
  • Kim Jong-un is already traveling for his summit with Trump on Wednesday.
  • Rather than flying, he's taking a 60-hour train trip through China.
  • The trip is a closely guarded secret, but this map shows the most likely itinerary.
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Elon Musk interview reveals whether he prefers Nikola Tesla to Thomas Edison

In 2008, Elon Musk explained which of history's tech geniuses was his role model.

  • In 2008, Elon Musk told an interviewer about his role models.
  • His father had less of an influence than has been reported.
  • Musk was a fan of both Edison and Tesla but preferred Edison.
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Copenhagen residents are torn over Denmark's proposed 'Silicon Valley'

It may create the conditions for further inequality.

Architectural rendering by Urban Power for Hvidovre Municipality
  • The Danish government is building nine artificial islands known as Holmene off the coast of Hvidovre.
  • The 33 million square feet of new land will house 380 businesses and 170 acres of parkland, creating 30,000 new jobs.
  • Local residents fear this project will alienate the middle class while disrupting traffic and public transportation systems in nearby Copenhagen.
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How will we travel to another star?

Proxima Centauri, our closest star, is more than 4 light years away. Reaching it under 10,000 years will be challenging; reaching it with living humans will be even harder.

NASA
  • Eventually, humanity will want to travel to a new solar system to propagate the human race, explore, and maybe find signs of alien life.
  • But our closest neighbor, Proxima Centauri, is so far away that current methods could take tens of thousands of years.
  • How will we surmount this incredible distance and the other challenges associated with interstellar travel?
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