A huge tsunami occurred when the asteroid hit the ... in the muds as the tsunami waned,” scientists noted. The mega ripples map could help us further understand the extinction event that wiped ...

Researchers found that the impact triggered mega ripples on the seafloor ... persisted in the muds as the tsunami waned,” scientists wrote. This new map of the megaripples can help predict ...

A government panel has revised its damage estimate for an anticipated mega-quake in the Nankai Trough off Japan's Pacific ...