Energy regenerates over time, one every 2 minutes, and can be boosted with gems. Completing orders, quests, and events gives extra energy and coins to you. Free energy links only last 2 days, so grab ...

Converting the vibrations generated by water currents in contact with an object into energy. This is the basis of the new ...

Do you think you've got decent science knowledge? It's time to put your gray matter to the test with our weekly, free science crossword puzzle. We've spent hours carefully writing our puzzles to make ...