What is the LK-99 superconductor? Everyone is talking about how it could change the world, but experts say we're still a long way off

• South Korean scientists claim to have made a superconductor, LK-99, that works at room temperature.
• Experts are skeptical, but if such a material exists, it could boost energy production and storage. 
• It could also improve chips used in cars and consumer electronics like cell phones. 

Electricity is inefficient compared to what it could be. But electricity that travels along a superconductor barely loses energy along the way.