Ever wondered what might have been? These eight coloring pages feature spacecraft designs that pushed boundaries but never reached orbit—including the sleek European Hermes, the distinctive Kliper lifting body, and bold concepts like the delta-winged X-33 VentureStar. You'll find launch profiles, orbital configurations, and detailed comparisons that give you a real sense of how engineers imagined the future of space travel, all ready for your colored pencils and markers.
