52-foot-high 'megaripples' from asteroid that killed the dinosaurs mapped deep beneath Louisiana in 3D

Artist impression of an asteroid falling towards earth .

"Megaripples" in the seafloor that were created in the aftermath of the dinosaur-killing asteroid impact extend much farther than scientists originally thought, new research shows.

The findings offer a new insight into the extreme forces unleashed by the tsunami that followed the Chicxulub asteroid impact at the end of the Cretaceous period 66 million years ago.