Tortoises need to warm up their blood under the open sun, but when it gets too warm, these cold-blooded creatures will have to find shelter and a cool breeze under the shadow of a bush.
Tortoises need to warm up their blood under the open sun, but when it gets too warm, these cold-blooded creatures will have to find shelter and a cool breeze under the shadow of a bush.
General Note
Originally released by BBC Worldwide Learning, 2011.
Streaming video file encoded with permission for digital streaming by Infobase on April 18, 2015.