Let's check out the ways:
1. They have remarkable regeneration abilities, and never scar. Like lizards,
2. They have bony plates on their tails. Like...lizards.
3. One species menstruates. Like us. (The list of mammals that menstruate is thin, and other than apes and old world monkeys, it includes elephant shrews and some species of bat).
3. They can shed their skin when grabbed...and then regrow it.
They are strange...although they are definitely rodents! This may indicate that some very strange genes are dormant in a variety of mammals. They're being studied to see if we can use their regenerative capabilities to help humans heal without scarring.
What they are not, however, is mice. They look like mice, but genetics place them in the same group as gerbils.
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