Alexander Mackenzie was a Scottish explorer who discovered an overland route across Canada to the Pacific Ocean. His crossing in 1792 was the first east-west crossing of the North American continent made by a European no... More »

Alexander Fleming discovered the antibiotic, penicillin. He found this important substance purely by accident when he observed penicillium mold in a petri dish preventing staphyloccoccus bacteria from growing around the ... More » Science Biology Botany

Ferdinand Magellan discovered the Straits of Magellan, a passageway through southern South America and the Pacific Ocean. While Magellan receives credit as the first to circumnavigate the world, his slave Enrique was the... More »

During their expedition with the Corps of Discovery, Meriwether Lewis and William Clark traveled approximately 3,700 miles from the city of St. Louis to the Pacific Ocean. The expedition left St. Louis on May 14, 1804, a... More »

Facts about Lewis and Clark found on the National Geographic website include how Thomas Jefferson sent them on an expedition out west in 1803 to find a water route leading to the Pacific Ocean. Thomas Jefferson believed ... More » History Modern History Exploration & Imperialism

In their cross-country trip to the Pacific Ocean, Captain Meriwether Lewis and Second Lieutenant William Clark went through Missouri, Kansas, Nebraska, Iowa, North and South Dakota, Montana, Idaho, Oregon, and Washington... More »

Italian explorer Giovanni da Verrazzano commanded voyages to the East Coast of North America, intending to find a passageway to the Pacific Ocean. The voyages were sanctioned and funded by King Francis I of France, who f... More » History Modern History Exploration & Imperialism