Which British explorer is credited with the "discovery" of the Niger River, sparking further interest in the Nigeria Area?

The British explorer who is credited with the "discovery" of the Niger River and sparking further interest in the Nigeria area is David Livingstone. He was a Scottish missionary and explorer who travelled extensively throughout southern Africa in the 19th century.
Livingstone embarked on several expeditions with the aim of exploring and studying the African continent. One of his most significant journeys took place in 1854 when he ventured inland from the west coast of Africa with the goal of finding the source of the Niger River.
During his exploration, Livingstone encountered the Niger River and became the first European to navigate its entire length. His discovery of the river opened up a new understanding of the geographical landscape of Africa and fueled curiosity about the interior regions. It also highlighted the potential for trade and further exploration in the Nigeria area.
Furthermore, Livingstone's expedition and subsequent reports increased international interest in Africa, particularly among other explorers, scientists, and European nations. His exploration contributed to the mapping and knowledge of the continent, and ultimately played a role in the colonization of Africa by European powers.
In summary, it was David Livingstone who discovered and navigated the Niger River, leading to heightened interest and exploration of the Nigeria area.