Cribbins 1 Hook. The extinction of dinosaurs is a mystery in itself that has stumped scientists all over the world for decades, and they still look for new answers every day. Scientists know some background information, but cannot connect the dots to see the bigger picture. There was little interest in the topic until Luis and Walter Alvarez proposed a groundbreaking hypothesis, which today we call the “Alvarez Hypothesis”. This new idea of the Alvarez’s was exciting, and therefore got the media
years ago, the most recent mass extinction seemed to have caused all of them to die-off. What caused the demise of the dinosaurs and 60% of life on Earth at the time? How did it affect life on Earth afterwards? Are all of the Dinosaurs dead? Will this happen to humans in the near future?
Dinosaur Extinction: • Introduction to the K-T event. • Theories of extinction. • Assumptions of extinction: 1. Due to climate change. 2. Due to small mammals that ate dinosaur eggs. 3. Due to dinosaurs’ bodies that are too big to be worked by their little brains. 4. Due to starvation. 5. Due to environmental change. 6. Due to Supernova that showered the earth in radiation. 7. Due to iridium-enriched mud. • Extinction- Still a theory. The K-T event, or the Cretaceous-Tertiary extinction
Extinction of Dinosaurs due to Asteroid Impact Nobody knows for sure exactly how the dinosaurs became extinct. However scientists have speculated for decades about possible events that caused the dinosaurs to die out. Possibilities range from asteroids, to volcanoes, to climate changes. One of the more popular or well-known extinction theories involves the belief that an asteroid struck the Earth, causing devastating effects, and triggering mass extinctions around the end of the Cretaceous