On the eve of the landing of the rover Perseverance on Mars, scientists are looking ahead to the work it will do searching for evidence of past life on the planet and collecting samples for return to Earth.
The detection of phosphene gas in the clouds of Venus has given rise to the thought of extraterrestrial “aerial” life on hostile Venus. This promising find begs the question: Now what? SpaceNews contributor Leonard David discussed this issue with astrobiologist David Grinspoon, a senior scientist at the Planetary Science Institute and an expert on surface-atmospheric interactions on terrestrial planets, such as Venus.
Discoveries involving two “ocean world” moons in the outer solar system announced April 13 are likely to bolster the case for planned and proposed spacecraft missions to those worlds.