A pack of Beagles
here
"There was absolutely nothing wrong with Beagle 2. We're going for a second voyage in the same way that HMS Beagle (Darwin's ship) actually did its best work on the second voyage."
The beauty of Beagle is that it has shown how you can shrink landing gear and scientific kit into the smallest of capsules for interplanetary space flight.
In this Lilliputian world, you could cram five or more Beagles into the cruiser that took Nasa's Spirit to Mars.