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Tsunami debris: Boulders
October 9, 2008
An enormous tsunami may have been the source of a line of huge boulders, up to 1,750 tons each, on the Polynesian island of Tongatapu. University of Texas researchers report the boulders match the coral reef offshore. They likely were flung to shore within the past few thousand years.
TADPOLE DANGER: MALATHION
A University of Pittsburgh study indicates malathion, a widely used insecticide, can decimate tadpole populations by altering their food chain. Small amounts of malathion kill organisms that eat phytoplankton. Overgrowth of phytoplankton then smothers bottom-dwelling algae that tadpoles eat.
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