It is presumed that the solar system came into the cosmos about
5 billion years ago and the life of the sun will continue on about
5 billion years more from now. However, it is also presumed that
the Sun will begin expanding itself rather before that time and
reach the size swallowing the present Jupiter and Saturn, until
that time the Earth will also become the victim of the Sun, though
nobody knows whether it is tasty or nasty.
After the Earth was born as a member of the solar system, there
have been a variety of dramas which can be called 'rise and fall'
on the Earth. Geologically, the cooling of the Earth, the birth
of the sea, the birth and separation of continents, and the variation
and stabilization of the atmospheric components, while biologically,
the birth and evolution of life, the discontinuation of the evolution
by cosmic factors such as meteorite collisions and the destruction
of environment caused by mankind, those are events which attract
our immediate attention.
The 'separation of continents' has been keeping on until now e.g.
the Hawaii Islands have been coming near the Kamchatka Peninsula bringing
forth new volcanic islands or the separation have been causing such
big disasters as the earthquakes off Sumatra last year and in Pakistan
recently. As the Japan Islands are located at the forefront of the
continental separation, more exactly the continental drift, we have
been suffering from earthquakes of all sizes.
'Its exquisite balance of the atmosphere surrounding the earth has
been created by the whole earth, and observing the earth from such
a viewpoint, the earth is not a mere stage of life activities but
the whole earth composes a big life sphere' asserted by J. E. Lovelock
in his 'GAIA Hypothesis, the GAIA is a great mother in the Greek myths.
As a lot of gigantic hurricanes broke out in the Gulf of Mexico this
year, 2005, CO2 which has exponentially been increasing in these tens
of years has begun threatening the 'life sphere of the earth'. The
'warming of the earth' has surely been surging on at a further closer
distance than the one-time, still continuing now, enlargement of the
It has become quite familiar through the popular movie 'The Jurassic
Park' that the rise and fall which is depicted by the overwhelming
doctrine that dinosaurs who had enjoyed their prosperity for tens
of millions years in the Jurassic period is an operatic as well as
vividly interesting legend coupled with the their extraordinary sizes.
In the rise and fall of the earth, personally, I am interested in
the 'rise and fall' of the Cambrian period.
The Cambrian period is the time around 500 million years ago, and
in this period living creatures born about 3 billion years ago had
diversely evolved all at once, the certain causes or triggers have
still been unknown, and almost died out within about 50 million years,
an ephemeral period in the geological feeling. Only a few survived
living species, it is said only a few percent, have been evolving
with all their might and creating today's diverse 'life sphere' including
When I finished searching for all the details for of the rise and
fall through the book titled 'WONDERFUL LIFE' written by Stephen Jay
Gould, I was so much surprised that I lost my word, honestly speaking.
In this connection the title of the book is quoted from a musical
the author loves.
The attached photograph shows the 'halukillgenia' who walked about
in the Cambrian period, I don't know if the description 'walked about'
is apt, however this is one of my very favorite ancestors.