English Grammar 50: 50 - Part 1 Many scientists believe that the dinosaurs were wiped out by a colossal meteor. According to this theory, a meteor ten kilometers wide hurtled into the Earth. This collision propelled dust and dirt into the sky. Imagine a really cloudy summer day. It’s a lot cooler, right? Well, every day was like that for a long time after the collision. Because it was much darker and cooler, many species of plants began to die. Soon, there was no food source for plant-eating dinosaurs, and when they died, there was no food source for meat-eating dinosaurs. The only animals to survive were small ones able.
