What cause a new extinction event without weapons or ansteroids?

What are the ways to conserve petroleum? What is the gray bats predator? What is the Honey Possum's scientific classifications? What animals are endangered in the Pacific Maritime? Were saber-toothed tigers fast? Are jackalopes extinct? What is the komodo dragons future? Is rattlesnake hunting and killing illegal in Virginia? When was the Black and Tan Terrier extinct? What is the pink dolphins life cycle? Are muskrats endangered? Why are they being extinct? Why is the Laysan Duck endangered? How do organisms that are not autotrophs get food? Is there another word for deforestation? What is the difference between high biodiversity? Is the bamboo forest even a biome? What was the fourth major extinction event? Make a sentence with a word endangered? Why was the Canada Lynx endangered?