Dinosaur extinction (IMAGE) University of Texas at Austin Caption Dust from the asteroid impact was blown into the atmosphere where it blocked out the sun and led to the extinction of 75% of life, including all non-avian dinosaurs. Credit Willgard Krause/ Pixabay Usage Restrictions include credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.