Catnip's Cat-Attracter Is Example of 'Repeated Evolution' (image) Florida Museum of Natural History Share Print E-Mail Caption Catnip evolved its cat-attracting chemical, actually an insect repellant, tens of millions of years after one of its ancestors had lost the ability to make this type of compound. Credit Alex Abair Usage Restrictions Please credit Alex Abair. Share Print E-Mail 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.