What were the motivations behind these explorations?

View of the Nile River, from a cruiseboat, between Luxor and Aswan in Egypt. This is a list of the longest rivers on Earth. It includes river systems over 1,000 ... Mar 21, 2023 ... a) Rivers are constantly changing their course, shortening or lengthening b) The length of the river alters depending on what unit of ... May 9, 2019 ... Just over one-third (37%) of the world's 246 longest rivers remain free-flowing, according to a new study published in the scientific journal ... The five longest rivers in the world are the Nile (in eastern and northeastern Africa), the Amazon–Ucayali–Apurímac (in South America), the Yangtze (in China), ... Sep 16, 2012 ... Asimov said, the Missouri-Mississippi river would be considered the longest in the world, beating out the Nile by several hundred miles. Mar 12, 2025 ... What Is the Longest River in the World? Top 5 Longest Rivers · 1. The Nile River (6,650 km) · 2. The Amazon River (6,400 km) · 3. The Yangtze ... Longest river ... The Nile is credited as the longest river in the world. Its main source is Lake Victoria in east central Africa. From its farthest stream in ... Nov 28, 2016 ... India's grand plan to create world's longest river set to go ... Engineering projects don't come any bigger than this. If India's prime minister, ... Oct 10, 2018 ... Click through to discover the 40 longest rivers on Earth: WitR / IStock. 40. Salween ... NASA explores the unknown in air and space, innovates for the benefit of humanity, and inspires the world through discovery. About NASA's Mission · Join Us.