Although this strange animal looks like an alien hybrid of a porcupine and an anteater, it’s neither a rodent like the porcupine nor a typical mammal like the anteater. This is a short-beaked echidna, found in Australia and New Guinea. Echidnas, also called spiny anteaters, are monotremes, a mammal that lays eggs. The only other egg-laying mammal in the world is the platypus.

The mother lays an egg, and it’s incubated in a temporary pouch. Once the egg hatches, the baby echidna—called a puggle—stays in the pouch and laps up milk from special glands called milk patches. Unlike other mammals, echidnas do not have nipples. The puggle stays in the pouch for about two months, when it begins to grow spines. The mother then moves it from her pouch to a burrow and cares for it the next seven months. Echidnas nest in burrows that other animals have left behind or they can sleep in hollow logs, rock crevices, under bushes, or in piles of leaves.

Echidnas use their narrow snout, which functions as both a nose and mouth, to search out ants, termites, spiders, worms, and other larvae. They capture their food with a long, sticky tongue. They can forage up to 18 hours a day and are most active from dusk until dawn.

Their spines are a specialized kind of hair and are used for defense. When attacked, they will curl up like a hedgehog. They can also use their powerful claws to bury themselves in the ground to get away from an attacker.

Here are five more fascinating facts about echidnas:

1. Echidnas are named after a creature in Greek mythology, who was half woman, half snake, probably because they have both mammalian and reptilian characteristics.
2. Their sticky tongues can be almost seven inches long.
3. They are the most widespread of Australia’s native mammals and can live anywhere from snowy mountains to deserts.
4. In colder areas, they will hibernate, waking every 2 to 3 weeks.
5. While their lifespan in the wild is about 15 years, echidnas can live up to 50 years in captivity.

So while I very seldom see one of these alien-looking animals, I know they’re in the neighborhood not too far away, munching on ants and other insects every night. 

The power of water does weird and wonderful things to the southern coast of Tasmania. Strong winds from the southwest create pounding waves that attack the rockface and erode the coastline. In addition to the Tesselated Pavement, three other sites on the Tasman Peninsula illustrate the remarkable power of water: The Blowhole, Tasman Arch, and Devils Kitchen.

Before looking at The Blowhole, here’s a primer on how water forms caves. Imagine the sea as it crashes against the base of cliffs. The waves carry sand and rock debris, which act like a big horizontal piece of sandpaper, cutting a notch into the vertical rockface until a crack or joint is reached. Compressed water and air wedge in the crack, forcing the rock apart. Continued erosion makes a cave longer and wider.

The Blowhole was a sea cave and tunnel until the roof at the back of the tunnel collapsed. The result was a broad arch with a blowhole behind it.

Eventually, the water will cause the rest of the arch to collapse as well so that it looks more like the next formation.

Devils Kitchen was likely a sea cave and then a tunnel. The waves over many thousands of years have eroded the rock, causing the roof to completely collapse. The water follows its inexorable path, cracking joints to create new caves in the rockface.