In 1990, Michael Richard "Rich" Clifford started his career as an astronaut. He was diagnosed with Parkinson's disease in 1994, but it didn't stop him from completing three space trips, and orbiting around the globe for 665 hours. When he was diagnosed, he was just 42 years old. He was alarmed enough to go go to the doctor once he experienced difficulty moving his arm and hand properly. Since his diagnosis, Clifford has been raising awareness and encouraging others living with Parkinson's to still pursue their dreams. In 2012, he was awarded the Public Leadership in Neurology Award from the American Academy of Neurology for his dedication and hard work. 

Photo source: NASA/Wikimedia Commons