Up, Up, And Away! It's Super Germ!

Just like in the Fantastic Four, germs taken onto the space shuttle came back three times stronger than before. Specifically, salmonella, came back three times more infectious, and mice given the germ were more likely to die as well. 167 different genes were altered by the space ride, but scientists don't know how, for sure, but suspect microgravity forced a mutation in the bacteria. As they say, more experiments need to be carried out, because we want to know what is making these microbes say "It's clobberin' time!" when they come back to earth.