NATURE: A great white shark nicknamed Nicole logged more than 12,000 miles swimming from Africa to Australia and back in less than nine months. Researchers say it is the first time a shark has been known to cross an entire ocean.
A second report details the movement of dozens of salmon sharks from summer waters near Alaska to warmer winter quarters off Hawaii and Baja California. Both reports appear in today's issue of the journal Science.
Most of the sharks swam up and down the South African coast, but Nicole - named after Australian actor and shark lover Nicole Kidman - made a beeline for Australia, where her tag popped up to the surface. In August 2004, her distinctively notched dorsal fin was spotted in South African waters again. The results suggest that one in 32 sharks may have wanderlust.