The image in the top left corner is the Kentucky
The Kentucky Derby and Evolution
Every year, thousands of race horses are born. Only a few of them are good enough to even enter
the Kentucky Derby. The winners of the big race eventually go out to stud, and sire a much larger
number of offspring than the average horse. Over the centuries, the process makes race horses
faster and faster. This is a type of evolution, called artificial
selection, in which humans meddle.
Something similar happens in the wild. Instead of a single race there is a life-long deathblow
with events like running from predators, fighting other horses for the right to mate, successfully
digesting food, enduring mosquitoes and blackflies, withstanding hot and cold weather… The
losers die or have little chance to compete for a mate. They leave behind relatively few offspring,
compared with the winners. Over the centuries, the horses get more fit. How could it be otherwise
if offspring tend to resemble their parents and fitter parents have more offspring? That is a type
of evolution called natural selection. Artificial
selection works the same way as natural selection, except humans
are even more ruthless at elimination than nature and may have more narrow criteria for what
Creationists may have told you there is some incredibly improbable game of chance going on.
However, there is no randomness involved, other than every year all the colts born are different.
The colts are also in general similar to their parents. There is nothing in the least improbable or
bizarre going on.
Put the shoe on the other foot. Ask a creationist how it could possibly be that horses would
not get fitter over time? What would undo the effect of the fittest horses having
the most offspring?