Research a significant paleontology (fossils) discovery in the past

Research a significant paleontology (fossils)  discovery  in the past 30 years. In three typed double-spaced (or less than double-spaced if you have more to say) report on: 
What was discovered, where? how, and when?
How does this discovery change our understanding of life/ evolution/ extinction.
Why it is significant?
What the skeptics say and what are the competing thoughts are about this discovery and why? 
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Sign UP on the Discussion Board for your choice under Paleo Discovery- Project Test #3
Three pages of your report. No pictures on these pages.
Fourth Page is references.
Additional pages are pictures.