How did the passion flower get its name? When the first Christian missionaries landed in South America in the sixteenth century, they found a plant which seemed to be a very good omen for the success of their mission. They called it the passion flower because they thought that it symbolised the death of Christ.
Astronauts actually grow 2 to 3 inches taller (5 to 8 centimeters) when they are in space! The stretching can cause them some pain; many astronauts have back pain while they are in space and the stretching can potentially injure nerves. Expedition 10 Crewmembers onboard the International Space Station.
Risks of Space Travel. There are, of course, two sides to every story, and space travel certainly does not come without risk. I have already alluded to one major risk - human health. Our bodies have a difficult time adjusting to micro-gravity environments, and astronauts' limited use of bones and muscles while in space can damage these vital tissues.