TEHRAN, May 23- As Earth's temperatures continue to rise, freshwater ecosystems in the Arctic are becoming unusually warm -- too warm for many native species.
TEHRAN, Feb 11 -"When we look at the rivers we have studied, the sharper the bend, the tighter the bend, the faster it moves," researcher Zoltán Sylvester said.
TEHRAN, December 22 -New research suggests river erosions can explain the pattern of earthquakes faraway from plate boundaries, like the 4.4 magnitude quake that shook Eastern Tennessee last week.
TEHRAN, September 05 - Photographic artist Paul Harmon visits the floodplains of the drought-stricken Murray-Darling basin in north-west New South Wales to showcase the preciousness of water and the attempts to harness it.