'This planet, once wrongly thought to have canals, may have water at its surface after all'
Mars
POPULAR SCIENCE TOP STORIES OF 2000: This planet, once wrongly thought to have canals, may have water at its surface after all
This planet, once wrongly thought to have canals, may have water at its surface after all
This planet, once wrongly thought to have canals, may have water at its surface after all
POPULAR SCIENCE TOP STORIES OF 2000
Mars
POPULAR SCIENCE TOP STORIES OF 2000