The surface of Mars is known for being an extremely cold, desiccated, and irradiated place. But as its many surface features ...

During the last 20 years, Australia has assumed a major role in the production of blue sapphire. Most of the gem material comes from alluvial deposits in the Anakie (central Queensland) and New ...

It was through a letter dated March 30, 1579 that Giovanni Arduino announced the four orders that form the basis of ...