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.
Effects of Space Travel on the Human Body. The effects of space travel on the human body are primarily caused by the existence of a microgravity environment that causes weightlessness and the vacuum of space when unprotected. While we can isolate ourselves from the effects of the vacuum, weightlessness cannot be avoided. slide 1 of 3.