40 | New Scientist | 13 July 20192.5 seconds
The time to wait for a reply
when video-chatting to
someone on the moon12
Number of people who have
walked on the moon, all
between 1969 and 1972The Lunar Sample Laboratory
Facility (top) at NASA’s
Johnson Space Center is
where moon rock samples
are stored. One experiment
tried culturing plant material
on lunar soil, which turned it
a greeny-yellow (bottom).BO
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-233°C and 123°C
Temperatures measured at
the coldest and hottest points
on the moon“ The collision that formed the
moon was so hard that the
Earth seems to have entirely
melted in the process”