Venus Express seeks out gases below the clouds   An artist's impression showing the molecules that Venus Express has found in Venus's lower atmosphere.   Venus Express is studying largely unknown phenomena in the Venusian atmosphere like never before. Its suite of instruments is also digging into the interaction between the solar wind and the planetary environment. In addition, the mission is gathering glimpses of the planet's surface, which is strictly coupled with its dense atmosphere. Release date: 4 April 2008