Add Yahoo as a preferred source to see more of our stories on Google. When was the last time you planned a backpacking trip without a computer, phone, or GPS unit? Think hard. Unless you're a ...

Students analyze and interpret topographic contour maps to describe their three-dimensional structure while learning about technology used to map the seafloor, Earth's surface, and other worlds.

When was the last time you planned a backpacking trip without a computer, phone, or GPS unit? Think hard. Unless you're a dedicated old-schooler, it probably wasn't recently. If your map skills are ...