diumenge, 8 de gener del 2012
dijous, 5 de gener del 2012
diumenge, 1 de gener del 2012
NASA.gov - Train Like An Astronaut
Click the following to access the link:
http://www.nasa.gov/audience/foreducators/trainlikeanastronaut/home/index.html
http://www.nasa.gov/audience/foreducators/trainlikeanastronaut/home/index.html