The National Geographic Magazine, Volume 194National Geographic Society., 1998 - Geography |
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... Whales : Closer Bonds Like bull elephants , male sperm whales are loners . Females live in groups ( left ) , but males leave at about age six to wander the seas . Maturing 20 years later , they were thought to mate randomly . But DNA ...
... Whales : Closer Bonds Like bull elephants , male sperm whales are loners . Females live in groups ( left ) , but males leave at about age six to wander the seas . Maturing 20 years later , they were thought to mate randomly . But DNA ...
Page 84
... whales are a whole new frontier . " Hal began sailing at the age of eight in England , his native country . He went on to earn a degree in mathematics before the sea drew him back to take up the study of whales . Sur- veying male sperm ...
... whales are a whole new frontier . " Hal began sailing at the age of eight in England , his native country . He went on to earn a degree in mathematics before the sea drew him back to take up the study of whales . Sur- veying male sperm ...
Page 88
... whales have submerged on a long dive , presumably in search of deepwater squid , their favorite fare . Then the waiting begins . It is how I imagine things were in the whaling days : seemingly interminable stretches of silence and tense ...
... whales have submerged on a long dive , presumably in search of deepwater squid , their favorite fare . Then the waiting begins . It is how I imagine things were in the whaling days : seemingly interminable stretches of silence and tense ...
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