Shark’s wide face explained
(The Guardian): The bizarre appearance of hammerhead sharks has led generations of marine biologists to ponder the same question: why the wide face? Part of the answer may now be at hand. Eye tests on species caught off the coasts of Florida and Hawaii show that the wider the head the better the shark’s binocular vision, and hence its perception of distance. The fish are thought to have evolved their wide, wing-like skulls to enhance their sense of smell and ability to pick up electrical activity from other marine life, but the latest study is the first to investigate the role eyesight may have played.
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