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| | L.A.'s Oldest Tourist Trap: Science News Online, Jan. 24, 2004 (Site not responding. Last check: 2007-11-07) |
 | | In particular, the respective ratios of carbon isotopes and nitrogen isotopes in bones excavated from the tar pits shed light on dietary habits of the very animal from which the bone derived. |
 | | Since excavations began at La Brea more than a century ago, the remains of more than 650 species, including at least 60 mammal species, 140 types of plants, 120 varieties of insects, and 60 species of snails and other mollusks have been yanked from the tar-laden sediments. |
 | | Although the tar pits trapped most of their victims between 44,000 years and 4,000 years ago, they're still a danger for the unwitting creature. |
| www.sciencenews.org /20040124/bob9.asp (2309 words) |
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