By Sid Perkins
The extraterrestrial object suspected to have splashed down near Mexico’s Yucatn peninsula more than 65 million years ago did more than just blast a big hole, cause worldwide climate change, and wipe out the dinosaurs. In the short term, seismic vibrations triggered massive underwater landslides and tsunamis far up the eastern coast of North America (SN: 12/9/00,
p. 373: Chalk reveals greatest underwater landslide). Now, scientists say they’ve identified enormous earth movements from the same era along the Pacific Coast.