[Dominic Harr]

The only difference between 'microevolution' and 'macroevolution' is time.

If you believe in 'microevolution', you believe in evolution.

The only real, core difference here is a debate about the age of the Earth.

Interesting, yes?

[DaveyB]

If you believe in 'microevolution', you believe in evolution. The only real, core difference here is a debate about the age of the Earth. Interesting, yes?

But oh so very wrong!

The expression of an existing gene is hardly the same as creating new reproducible genes.

[foolish-one]

The only difference between 'microevolution' and 'macroevolution' is time.

Well, I guess it's "time" to answer this statement. Microevolution usually involves mutations and changes in genes - hereditary units within chromosomes. Macroevolution requires the addition of entire chromosomes. Mutations are easy to understand and explain. The addition of entire chromosomes is difficult to explain and opens up a whole 'nother can of worms in unanswered questions. If you understand biology - a huge difference. If you don't (or if you don't wish to), ignore, wonder still and press on.