Trapped

Attracted by the oozing sap, a winged bark louse flitted greedily around the tree. Alighting on the sticky stuff, he was soon stuck fast. A watchful spider darted toward the struggling louse, had almost reached him when the flow of sap engulfed both him and his quarry.

This little drama occurred during the Oligocene Period, some 30,000,000 years ago, in the Baltic region. Last week the shells of the spider (Oonopidae) and the bark louse (Psocidae), beautifully preserved in the amber, were put on display at Manhattan's Museum of Natural History.

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