At a party, teen-agers of the Bounds twins' set munch doughnuts and sip cokes whenever they are not dancing with serious faces to sentimental music. At right, Barbara dances with Jimmy Dick.
Caption from LIFE. At a party, teen-agers of the Bounds twins' set munch doughnuts and sip Cokes whenever they are not dancing with serious faces to sentimental music. At right, Barbara dances with Jimmy Dick.Nina Leen—The LIFE Picture Collection/Getty images
At a party, teen-agers of the Bounds twins' set munch doughnuts and sip cokes whenever they are not dancing with serious faces to sentimental music. At right, Barbara dances with Jimmy Dick.
Contrasts in teen-age clothes are shown by Betty Bounds (right), wearing a dainty 1947 outfit, while Barbara poses in sloppy get-up.
Chores are receiving new respect, for 1947 teen-agers think of marriage much more seriously than their wartime equivalents did. Note the frilliness of Betty's shorts.
Twins, Betty and Barbara Bounds with their parents, in Tulsa, Oklahoma.
Identical twins, Barbara and Betty Bounds of Tulsa, Oklahoma.
Although teen-age girls are more romantic and less boisterous than they used to be, they still like to put on some old clothes, whizz around with boys and even get a little grease on their hands.
Betty Bounds talking to classmates at school.
Identical twins, Betty and Barbara Bounds with a friend.
116515768.jpg
Identical twins, Barbara and Betty Bounds going for a ride with friends.
Identical twins, Barbara and Betty Bounds sunbathing.
Identical twins, Barbara and Betty Bounds riding a horse.
Teenager Nancy Churchwell tasting mixture for fudge cake as Barbara Bounds, 17, watches skeptically.
Identical twins, Barbara and Betty Bounds at Ballet class.
Identical twins, Barbara and Betty Bounds going for a ride with friends.
Caption from LIFE. At a party, teen-agers of the Bounds twins' set munch doughnuts and sip Cokes whenever they are not d
... VIEW MORE

Nina Leen—The LIFE Picture Collection/Getty images
1 of 15

Celebrate Twins Day With Vintage Photos of Identical Twins

Aug 07, 2015

This weekend, thousands of twins will descend upon the town of Twinsburg, Ohio, for the 40th annual Twins Days, the largest gathering of twins and other multiples in the world. Twins have long been a source of curiosity to non-twins—who wonder what classes they might have gotten away with skipping had they had an identical stand-in—as well as to scientists, who study twins to better understand the genetic versus environmental origins of certain traits.

When LIFE photographed 17-year-old identical twins Betty and Barbara Bounds in 1947, the magazine was more concerned with what the Bounds sisters had to say about the life of the postwar American teenager than that of a twin. Photographer Nina Leen captured the lives of the Bounds’ teenaged cohort in Tulsa, Okla., from their hairstyles (they “wear it shoulder-length”) to their accessories (“combs are often carried in sock”) to their interests (“boys and parties”).

Liz Ronk, who edited this gallery, is the Photo Editor for LIFE.com. Follow her on Twitter @lizabethronk.

TIME may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.