The big obstacle? It's not certain how well this bionic technology would work once put into practice. Researchers note that they still have to find a way to connect the system to solar cells. Also, there's the not-so-small matter of how it works in differing climates. This technique would thrive in a temperate environment, but it wouldn't last in extreme temperatures. If it does pan out, however, it could give developing regions a cheap, eco-friendly way to not only produce energy, but store it at times when the Sun won't cooperate.