incubators (IMAGE) Penn State Caption A look at the incubators that house the researchers' fertilized eggs. The incubators control the temperature so that the chick embryos properly develop during the research. Credit Kate Myers, Penn State Usage Restrictions non commercial use only License Original 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.