Squirrels (image) Michigan State University Caption When the woods get crowded, female squirrels improve their offspring's odds of survival by ramping up how fast their offspring grow. Credit Courtesy of Ben Dantzer. Usage Restrictions None 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.