National Geographic : 2005 Dec
FROM OUR ARCHIVES Flashback SEA MONSTERS Big Bite It was nearly 50 feet long and weighed 5 tons, with a mouth that could have gulped down a refrigerator. But we can only guess what Carcharodonmegalodon looked like before its extinction about a million years ago. Though ancient sharks' teeth are among the most plentiful prehistoric animal remains-this 1927 image shows a six-inch megalodon tooth framing a modern great white's-their skeletons were made of cartilage, and many decomposed too quickly to become part of the fossil record. -Margaret G. Zackowitz E-GREET A FRIEND with this image and find past Flashback photos, in Fun Stuff at ngm.com/0512. PHOTOGRAPHBYLEWISRADCLIFFE NATIONAL GEOGRAPHIC (ISSN0027-9358)ISPUBLISHED MONTHLY BYTHENATIONAL GEOGRAPHIC SOCIETY, 1145 17THST.NW,WASHINGTON, DC20036-4688 $34.00AYEARFORU.S.DELIVERY, $6.00 PERSINGLECOPY(INCLUDES POSTAGE ANDHANDLING). INCANADA, AGREEMENT NUMBER40063649,RETURNUNDELIVERABLE CANADIAN ADDRESSES TONATIONAL GEOGRAPHIC, POBOX4412 STN.ATORONTO, ONTARIO M5W3W2.UNITEDKINGDOMNEWSSTAND COVERPRICE£3.75. PERIODICALS POSTAGE PAIDATWASHINGTON, DCANDATADDITIONAL MAILING OFFICES.POSTMASTER: SENDADDRESSCHANGES TONATIONAL GEOGRAPHIC, POBOX63002,TAMPA, FL33663-3002.MEMBERS: IFTHE POSTALSERVICE ALERTSUSTHATYOURMAGAZINE ISUNDELIVERABLE, WEHAVENOFURTHER OBLIGATION UNLESSWERECEIVE ACORRECTED ADDRESS WITHIN TWOYEARS.