Two hurricanes, Iselle and Julio, that could hit Hawaii this weekend (seen here in a satellite image captured August 4) may have been influenced by an El Niño developing in the Pacific. NASA/NOAA GOES ...

When Dan Killam was a little boy he saw the ocean as a world of its own, filled with mysteries to be discovered. His parents nurtured his natural curiosity with regular trips to aquariums and zoos.

The fishermen had come for the giant clams, massive mollusks measuring as much as four feet across and weighing 500 pounds. Grinding their boat propellers against coral in the South China Sea, they ...