The ripples suggest that the lake was free of ice at one point.

I’m encouraging you to attend the upcoming Trout Fishing Expo. Go see what it’s about even if you don’t flyfish for trout.

These ripples, scientists say, are the telltale marks of waves that once lapped the shores of an ancient Martian lake. The discovery offers some of the strongest evidence yet that Mars was once a ...

In the new study, published online Jan. 19 in the journal Marine Geology, researchers analyzed an extensive set of petroleum ...