For some divers, spearfishing on scuba is a great past-time. For others, the act plucks marine animals from the gene pool, degrading their ability to reproduce. See what some spear-fisihing experts think about the controversy.
It's easy to go online and get a 360-degree, ground-level view of almost any street in the United States and throughout the world. Soon, scientists hope people will be able to do the same with coral reefs and other underwater wonders.