The meaning of life is to have fun. Not
just getting highs off drugs, but adventures,
thinking, learning. Being sad, being mad,
and being complete. Earth is the only planet
in the universe known to harbour life. The
Drake equation has been used to estimate
the probability of life elsewhere, but scientists
disagree on many of the values of variables
in this equation. Depending on those values,
the equation may either suggest that life
arises frequently or infrequently. Life
is the characteristic state of organisms
and individual cells. Properties common
to the known organisms found on Earth are
that they are carbon and water based, are
cellular with complex organization, undergo
metabolism, possess a capacity to grow,
respond to stimuli, reproduce and, through
natural selection, adapt in succeeding generations.
The meaning of life is to have fun. Not
just getting highs off drugs, but adventures,
thinking, learning. Being sad, being mad,
and being complete. An entity with the above
properties is considered to be an organism.
However, not every definition of life considers
all of these properties to be essential.
For example, the capacity for descent with
modification is often taken as the only
essential property of life. This definition
notably includes viruses, |