Everyone knows Antarctica is cold and icy, but what's underneath the ice has been a mystery. Scientists used six decades' worth of technology to take a peek.

A team of international scientists compiled decades of data to create a map showing the topography of Antarctica with the ice removed.

Never seen, perhaps, but that doesn't mean forever to remain unknown. For years, the British Antarctic Survey has been flying planes over the frozen southern continent, using radar, sound waves, and gravity mapping to ascertain the shape of the bedrock sequestered below.