The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. This photo shows th mixing of an orange tributary with clearer waters of the Anaktok River. Photo: Josh Koch, US Geological Survey Warmer summers, melting...
At present, the Australian Antarctic Division has three active stations on the continent and one on the sub-Antarctic island of Macquarie. Pictured here is Casey station (Photo: Peter Cummings, Australian Antarctic Program). A study conducted near an Australian...