The waters of Senegal's Lake Retba are back to their famous pink hues three years after floods washed away their rosy tinge -- and businessfolk and tourists are thrilled. No sooner had the news hit ...

Underwater volcanoes and hydrothermal vents on the seabed ... This effect is seen in other hypersaline bodies of water as well, such as in Senegal's Lake Retba. In contrast, salinity in some areas may ...