A friend of yours tells you about a report
he has read in a tabloid newspaper. They
claim that on the dark side of the Moon,
which is never in sunlight, there is a secret
base of aliens who cannot stand sunlight, and
who send UFOs to Earth under the cover of
darkness.
Ignoring the UFO claim for a moment, what
is the scientific eris in this story?
1. The dark side of the Moon is the one that
faces the Earth and our telescopes would have
spotted such a base.
2. Enough of the dark side has been explored
to establish the fct that no bases exist.
3. There are no scientific inconsistencies
with that story.
4. All sides of the Moon are illuminated by
sunlight in the course of a month; there is no
dark side.
5. Since the moon rotate on its axis, we see
all sides of it from Earth in the course of a
month.