The oldest generally accepted fossils of large animals range in age from 565 to 550 million years old.
Mammals and Birds are Warm-blooded Animals.
Warm-blooded animals have body temperatures that usually stay the same Whether it is sunny and hot outside or there is a snowstorm.They are able to regulate their body temperature which changes with temperature of environment.
By seeing the color of the nose we can determine the age of lions.
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