1.   Monkeys and apes are the only mammals with good color vision.

2.   Therefore, it is not surprising that they are the only mammals Decorated with bright colors such as blue and pink.

3.   Humans are the only mammals not endowed with a natural defense against the elements, such as fur or a thick hide.

4.   Bats are the only mammals that can fly.

5.   But Leon as Jimmy Sands, her assistant, is the only mammal in the movie capable of making the audience squirm.

6.   It is lower in humans, which facilitates the utterance of a wide range of sounds but makes people the only mammals incapable of simultaneously drinking and breathing.

7.   Shrubs developed neither thorns nor poisons to defend against hungry browsers, since the only land mammal was a bat.

8.   We are the only mammal whose mammaries stay permanently enlarged whether or not the glands are dispensing milk.