I can complete this quickly and with high quality. I don't rewrite merely by substituting words or substituting sentence by sentence. I read the article and rewrite it.
For example:
Dinosaurs ruled the Earth hundreds of millions of years ago, but suddenly disappeared. Scientists have various theories for this mass extinction - some better than others. But realistically even the top experts are baffled as to the real reason these massive animals disappeared, in historic terms, over night.
Rewrite:
The greatest scientific minds in the field of paleontology have mulled over a mystery for decades. They still don't have answers. How could a group of animals, dinosaurs, as a whole have mostly become extinct in the relative blink of an eye? Sure there are theories that explain it. But each theory is eventually busted as new evidence comes forward from the fossil record.
- Frank