• The discovery that Europa most likely has a cold, salty ocean beneath its frozen icy crust has put Europa on the short list of objects in our solar system that astrobiologists would like to study further

  • At the recent Earth System Processes II conference, Jack Farmer gave a talk on the current state of understanding about Mars: what we know and what we’d like to know. In this, the third and final part of a three-part series, he outlines the options for future Mars exploration.

  • Sending men to the Moon certainly changed the public perception of life on our own planet, thanks to the astronauts’ photographs of the Earth looking like an illuminated blue marble suspended in the deep black emptiness of space.

  • Life on Earth was made possible by the death of stars. Atoms like carbon and oxygen were expelled in the last few dying gasps of stars after their final supplies of hydrogen fuel were used up.

  • The detections of methane in the martian atmosphere have challenged scientists to find a source for the gas, which is usually associated with life on Earth. One source that can be ruled out is ancient history: Methane can survive only 600 years in the martian atmosphere before sunlight will destroy it.