TEHRAN, February 3 - Scientists say polar bears, the Arctic apex predators, need larger quantities of energy to survive than previously thought, warning that changing sea ice conditions, as a consequence of climate change, is making their prey increasingly inaccessible.
TEHRAN, February 3 - Scientists say polar bears, the Arctic apex predators, need larger quantities of energy to survive than previously thought, warning that changing sea ice conditions, as a consequence of climate change, is making their prey increasingly inaccessible.