Hanuman-Languren (IMAGE) University of Zurich Caption Parents have to invest a lot of time and energy until their offspring are independent - like this Hanuman langur mother with her offspring. (Image: Karin Isler, ZOOM Erlebniswelt, Gelsenkirchen) Credit Karin Isler, ZOOM Erlebniswelt, Gelsenkirchen Usage Restrictions Credits must be: Karin Isler, ZOOM Erlebniswelt, Gelsenkirchen 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.