Explorer whose efforts to improve sailing technology led to expeditions further out from the Atlantic coast

The declaration of independence gave the americans concrete reasons for the revolution

Space is not completely empty. there are small particles in space. what happens when these particles come together?

Historians have recently discovered a historical journal published in the early twentieth century. the journal contains facts based on original sources about the downfall of the early byzantium empire. historians consider this long-lost journal to be a breakthrough in their understanding of the byzantium empire. based on this information, the journal is a source.