Ancient Arab swords. Note that some designs were m...  ...ion along with the exploitation of specific local resources is obvious in this colorful aspect of human cultu...

Photo by Carsten Peter Perched above the lighted city of Catania, Italy, Mount Etna hurls a fountain of fire skyward as rivers of lava spill down its flanks. In spite of its dazzling displays, Mount Etna is a relati...