What cause a new extinction event without weapons or ansteroids?

How much of the savanna biome is destroyed? How much does a aye aye cost? How is biomass lost in a food chain? What is the literal meaning of ailurus fulgens or red panda? What color are sea otters? What would happen if there was a decrease in the tundra? The following vulnerabilities is most likely to be exploited by an external threat to the infrastructure? Where can you find the tamaraw? Are penguins protected? Are beavers endangered in Canada? In competitive exclusion who is competing and who gets excluded? What type of plants did the Columbian mammoths eat? Will every animal on earth become extinct? What is a uncontrolled cutting of trees? What is a yellowfish? What happened with the Deepwater Horizon oil rig? What is the theme of tiger's curse? Which three countries grow peanuts? How do you protect carlsbad caverns? What are the four main types of biome?