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Go ahead! Stretch your e-magination and test yourself. Click on the right answer and get the full scoop. Get it wrongtry again.
Its a mosaic of tiny, delicate tiles of glass.
The paper for this Valentines Day card is very old.
Its a living organism.
The blueberry gelatin was turned out of the mold too early, and its only half formed.
Heart Reef, part of Australias Great Barrier Reef, is made of living coral.
What makes this heart so fragile?
Photograph by David Doubilet
© 2001 National Geographic Society. All rights reserved.