Scientists have created a new map of "mega ripples" on the seafloor caused by ... of the effects and dangers of tsunamis and such giant waves triggered by space rock impacts.

In places, the lava was so soupy that it left semicircular ripple marks, like cake batter poured in a pan. At Badlands Rock, the last of the erupting lava must have been stiffer because it bulged up ...

Nestled in Alberta’s badlands, the Royal Tyrrell Museum houses ... Canada’s prairie provinces were sitting deep underwater. A giant inland sea cut right across North America.