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You might think that spiky little animal waddling along the forest floor is a porcupine. But it has a long, sticky tongue and it digs for ants, so maybe it’s some kind of anteater. Nope? Well, it’s a mammal, at least, right? Wait—it lays eggs. Mammals don’t lay eggs. So what is this thing?To read the rest, click on "Echidna—Outback Oddity" (audio version also available).
The echidna seems to break all the rules. It’s a mammal, but it lays eggs. It’s warm-blooded, but it has a low body temperature. It lives on land, but it detects food like some fish do. And, like so many other rule-breakers, such as the platypus, the echidna settled in Australia.