Venus may be called Earth's twin, but the conditions on Venus are far from welcoming for us Earthlings. Thick clouds, acid rain, and searing temperatures have kept space probes from visiting this hostile planet. Learn how scientist and science fiction writer Geoffrey Landis plans to overcome these challenges to sail his spacecraft across the surface of Venus. The books in the Out of This World series feature projects that have won grants from the NASA Innovative Advanced Concepts program (NIAC). The program provides funding to teams working to develop bold new advances in space technology.