Abraham Lincoln was American president during American Civil War. He also fought against slavery and is one of the most important presidents in the American history.
The circular grass creations, that look like something out of a different planet scattered throughout the Namib Desert have long been one of the mysteries of science.
If for some reason your Android powered smartphone does not perform as good as it used to, or you want to sell it I suggest you to bring it to its original factory state.
Amazon revealed a delivery technology straight out of sci-fi movies. Flying robot drones might start picking up and delivering packages to Amazon customers in not so distant future, awesome!