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Earth from the moon. We now know that the moon was made when a planetessimal (small planet)
crashed into Earth early in its history, knocking the planet about 23 degrees off of vertical relative to
the sun--which is why we have seasons--and throwing crustal debris into orbit that coalesced into the moon.
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Most of the Earth’s 92 naturally occur-
ring elements were forged in stars.
The Earth was a different place 4 billion
years ago--and the moon much closer.
There are about 340 species of primates,
and some, like this gray-shanked douc,
are stunningly beautiful.
The emergence of abstract thought and
complex language in Homo sapiens is
something new in the Universe.