The longest river in Spain is at risk of completely drying up due to an ongoing drought in the country. The 626-mile-long Tagus river, which begins in northern Spain and flows through Madrid before ...

A ‘Red River’ in Spain May Yield Clues to Life on the Red Planet. By DAVID HOLLEY . ... The 58-mile-long river, which flows through one of the world’s largest deposits of pyrite, ...