Would you guess that a love for plants could lead a scientist to outer space?It did for a botanist,Daniel J.Barta.Along with scientists from many different areas of study,he works every day to solve problems that people will face in space.Dr. Barta grew sweet potatoes in conditions identical to those in a spaceship.The experiment showed that growing plants on spacecraft can provide astronauts with food,clean water,and oxygen.When humans someday build stations on the Moon or travel to Mars,they will have people like Daniel Barta to thank.