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The life span of a typical G5 star is about 6 billion years. Yet, we don't have to wait 6 billion years to see the entire life cycle. Why? Because G5 stars are being born and are dying and are at every stage in between NOW.

When astronomers look skyward, please tell us how many different frames of time they are looking at? From our sun which we see a few minutes after light leaves it, to the furthest reaches many thousands of light years away, we are looking at a VAST time scale all at once.

While you didn't mean to do so, you have actually done a fine job drawing a parallel to exactly what fossils and the geologic column tells us, in much the same way.

A human being typically lives for 75 years and goes through various stages of development at that time.

Right, and 75 years is such an incredibly tiny time frame to observe the type of speciation you'd like to see.

We should be seeing transitional forms NOW.

We most certainly ARE. Then again, you are probably hoping to see the ol' lizard with one wing or some such silliness.

We should be seeing large amounts of speciation NOW.

We most certainly ARE! All over the place. Avian flu, AIDS, fish in the SW US...