SpaceMost space travellers are men despite slow rise in female astronauts Early space travellers were younger men, but the average age has risen since the 1960s. More women are also now going to space, but they only make up 64 of the 566 to have left Earth ¿ìè¶ÌÊÓÆµ
LifeRadiation-resistant bacteria could survive journey from Earth to Mars Bacteria strapped to the outside of the International Space Station were still alive three years later, suggesting that microbes could travel on asteroids between planets ¿ìè¶ÌÊÓÆµ