The Conversation (edited)
In the five decades since we first started sending spacecraft to Mars, exploration of the red planet has had a poor record of success. It is only in the last few years that we have come to expect that the number of successes greatly outweighs the failures.
This is why the decision to postpone the launch of ExoMars 2020 for two years should be regarded as responsible and sensible. Obviously, it is disappointing that this mission – a joint one between European Space Agency (ESA) and the Russian Space Agency Roscosmos – has been delayed. But