Signs of life

What do we need for life to exist? Most lists include:

  • a solvent
  • warmth
  • protection
  • construction material

The Hubble Space Telescope has spotted  number 4, in the form of methane and carbon dioxide in the atmosphere of HD 189733b

  • Read more about how we can find the chemical signs of life at the
  • HubbleSiteExplore these ideas in depth with’s “Is there Life in Space?” activities