Perseus Iron Creation (image) Stanford University Caption Young stars, exploding supernovae, and active black holes produced powerful winds 10 billion to 12 billion years ago. These winds were the spoon that lifted the iron from the galaxies and mixed it with the intergalactic gas. Credit Akihiro Ikeshita 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.