Describe the short-term consequences of the Yucatan impact. What effect did the asteroid have on Earth in the first few days after its impact? Answer in detail, using textual evidence.

The Yucatan impact was responsible for the extinction of the dinosaurs and many other plant and animal species. Choose one extinct species that Alvarez mentions in the book and explain how the asteroid impact created the conditions for its extinction. Conduct additional research if necessary, and include references to this text as well.

The impact hypothesis was a controversial idea within geology and paleontology in the 1980s. Explain the different perspectives on this hypothesis at the time.