Jupiter's watery moon

Nasa announced some ''surprising evidence of activity'' from Jupiter's largest moon yesterday, releasing new images captured from the Hubble Space Telescope. The images provide more evidence that there may be oceans on Europa.However, despite fevered speculation on social media - Europa is considered to be one of the best places to find alien life in the solar system and astrobiologists have theorised that organisms could survive in its oceans - Nasa quelled expectations before the press confer...