The
Earth - We Had Better Look After It

E
= mc^{2}

Above is the famous equation that Albert Einstein derived. But what does it mean
to us all? Is it not just part of the work of an academic, and of little
relevance to everyday life; no. If
we look at the variables in the equation:

E - energy

m - mass

c – speed of light

Link all these together and
you realize that at the speed of light, matter ceases to exist.
Or more correctly the speed of light is a limit and more and more energy
is required to come closer to this limit. Only
energy can exist at this speed. What
are the fastest speed people can travel through space? One
estimate is about one hundredth the speed of
light.
So if the nearest star to earth, Proxima Centauri, is 4.3 Light Years
away, it will take humans more than 400 years to reach it. Not
a very practical task. So for very
practical reasons we are staying here on Earth and we had better look after it
because it is the only one we will ever have. We
humans can't mess it up and then go and find another planet.

There are no
passengers on spaceship earth. We are all crew.

Buckminster
Fuller

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