And you have to check to make sure he touches the edge at the end of each lap.
Without these observations you cannot be sure that the time is valid.
We note that at the instant the swimmer touches the edge of the pool our wristwatch reads and 53 seconds.
How long has the competitor taken to swim the 1,500 metre race?
a horse mating with a donkey produces a sterile mule). Thirdly, their offspring would also have to be fertile and be able to continue the advance.
If animals of a given species mate and produce an abnormal offspring (i.e. Therefore, how could the macro evolutionary process advance? So if single celled animals formed in the primordial soup and they were asexual (not have either male or female characteristics, but reproducing by themselves, how would they advance to a hermaphroditic state (having both male and female sexual organs) and then to the higher orders of animals which almost always have distinct male and female reproductive organs? The Details: Evolution can only explain asexual or self-fertilizing hermaphroditic reproduction.
A swimming race illustrates the simple principles involved in measuring time.