Invulnerability

From a crocodile's bony scales to a naked mole rat's acid-proof skin, this hi-lo title shows invulnerability can come in many forms! Thoughtfully leveled text supports reluctant readers while introducing four animals that have adapted to be tough. Colorful photos label physical adaptations and show animals surviving in their habitats. Fun facts add more insight into these incredible animals. Other features show off invulnerability in action!