Yes, there is a slow transition to more flash memory-based products, but hard drives are still very much an integral part of our digital lifestyles. And we want to be able to store more data without having to increase the physical size of our drives. As it turns out, all we may need is a pinch of salt.
While solar panels can use stored energy from the day to provide power at night, and solar power is absorbed by higher-end solar panels even when it is cloudy, the panels still work best when the sun is shining its brightest. The solution to a steady supply of solar power even on cloudy days and at nighttime might come in the form of molten salt, which is an excellent conductor of heat.