Radiated Tortoise (image) Wildlife Conservation Society Caption A team of biologists from the Wildlife Conservation Society and the Turtle Survival Alliance have reported that Madagascar's radiated tortoise -- of the world's most beautiful tortoise species -- is being hunted to extinction. Credit Julie Larsen Maher/Wildlife Conservation Society Usage Restrictions Must use with photo credit. One-time usage only. 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.