Research fatigue of muscles during and after space travel by completing an internet treasure hunt worksheet and answering the questions. it is important to not only find the information at the site, but also to consider who wrote the site, what their purpose is in writing it, and how credible (accurate) you think the information is. good websites to go for information include the national aeronautics and space (nasa) website, the european space agency (esa) website, and the canadian space agency (csa) website