Which courageous European travellers brought to light the interior of Africa?

1. Courageous European travellers like Mungopark, John Hanning Speke, Samuel Baker, David Livingstone and Henry Morton Stanley brought to light the interior of Africa in the second half of the 19th century. 

2. They discovered the regions belonging to the basins of the Nile, the Niger, the Congo and the Zambezi rivers in Africa and brought these to the notice of the world.