During the decade after the ignition of Jupiter, and the spreading of the Great Thaw across its satellite
system, Europa had been left strictly alone. Then the Chinese had made a swift flyby, probing the clouds
with radar in an attempt to locate the wreck of the Tsien. They had been unsuccessful, but their maps of
dayside were the first to show the new continents now emerging as the ice-cover melted.
They had also discovered a perfectly straight two-kilometre-long feature which looked so artificial that
it was christened the Great Wall. Because of its shape and size it was assumed to be the Monolith -or a
monolith, since millions had been replicated in the hours before the creation of Lucifer.
However, there had been no reaction, or any hint of an intelligent signal, from below the steadily
thickening clouds. So a few years later, survey satellites were placed in permanent orbit, and highaltitude
balloons were dropped into the atmosphere to study its wind patterns. Terrestrial meteorologists
found these of absorbing interest, because Europa - with a central ocean, and a sun that never set -
presented a beautifully simplified model for their text-books.
So had begun the game of 'Europan Roulette', as the administrators were fond of calling it whenever
the scientists proposed getting closer to the satellite.
After fifty uneventful years, it had become somewhat boring. Captain Laplace hoped it would remain
that way, and had required considerable reassurance from Dr Anderson.
'Personally,' he had told the scientist, 'I would regard it as a slightly unfriendly act, to have a ton of
armour-piercing hardware dropped on me at a thousand kilometres an hour. I'm quite surprised the World Council gave you
permission.'
Dr Anderson was also a little surprised, though he might not have been had he known that the project
was the last item on a long agenda of a Science SubCommittee late on a Friday afternoon. Of such trifles
history is made.
'I agree, Captain. But we are operating under very strict limitations, and there's no possibility of
interfering with the - ah - Europans, whoever they are. We're aiming at a target five kilometres above sea
level.'
'So I understand. What's so interesting about Mount Zeus?'
'It's a total mystery. It wasn't even there, only a few years ago. So you can understand why it drives
the geologists crazy.'
'And your gadget will analyse it when it goes in.'
'Exactly. And - I really shouldn't be telling you this - but I've been asked to keep the results
confidential, and to send them back to Earth encrypted. Obviously, someone's on the track of a major
discovery, and wants to make quite sure they're not beaten to a publication. Would you believe that
scientists could be so petty?'
Captain Laplace could well believe it, but did not want to disillusion his passenger. Dr Anderson seemed
touchingly naïve; whatever was going on - and the Captain was now quite certain there was much more
to this mission than met the eye - Anderson knew nothing about it.
'I can only hope, Doctor, that the Europans don't go in for mountain climbing. I'd hate to interrupt any
attempt to put a flag on their local Everest.'
There was a feeling of unusual excitement aboard Galaxy when the penetrometer was launched - and
even the inevitable jokes were muted. During the two hours of the probe's long fall towards Europa,
virtually every member of the crew found some perfectly legitimate excuse to visit the bridge and watch
the guidance operation. Fifteen minutes before impact, Captain Laplace declared it out of bounds to all
visitors, except the ship's new steward Rosie; without her endless supply of squeezebulbs full of excellent
coffee, the operation could not have continued.
Everything went perfectly. Soon after atmospheric entry, the air-brakes were deployed, slowing the
penetrometer to an acceptable impact velocity. The radar image of the target - featureless, with no
indication of scale - grew steadily on the screen. At minus one second, all the recorders switched
automatically to high speed...
But there was nothing to record. 'Now I know,' said Dr Anderson sadly, 'just how they felt at the Jet
Propulsion Lab, when those first Rangers crashed into the Moon - with their cameras blind.'
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