A baby red kangaroo (Macropus rufus) is about the size of a jelly bean. Born after about 34 days of gestation, it’s less than an inch long — or 100,000 times smaller than its adult height (roughly 4 feet). This newborn kangaroo, called a joey, isn’t quite ready for prime time, however. Unlike most mammals, joeys are born while they’re still embryos, which means they lack sight, hearing, and hair. They spend the next six months in their mother’s pouch, or marsupium, where they suckle from a teat and continue to develop before finally taking their first steps into the world. If the word “marsupium” sounds familiar, it’s probably because that’s where the term “marsupial” comes from. Marsupials are a mammalian class that includes kangaroos, wombats, koalas, possums, and more — about 330 species altogether.

Baby rabbits are called kittens.

fact

FIB

Ready to reveal?

Confirm your email to play the next question?

sign up!

Please enter valid email.

Sign up

Oops, incorrect!

It's a fact

Cats don’t have a monopoly on the “kitten” term. Baby rabbits are also called kittens, while the animal’s short birthing process is called kindling. Rabbits can have multiple litters a year, with up to 12 kittens in each (though the average is five).

Kangaroos are some of the supermoms of the animal kingdom. Not only do they have a special pouch for their babies, but they can create two distinct types of milk to care for both the developing embryo and the more mature joey. They can even suspend their ability to conceive during times of drought, and then regain that ability when conditions are more favorable. With their remarkable adaptability, it’s no wonder kangaroos outnumber Australians nearly two to one. 

• Share to Facebook
• Share to Twitter
• Share to Email

The North Atlantic is filled with lobsters, and it’s been that way for millennia. In fact, the first European settlers who arrived in North America in the 17th century reported that heaps of lobsters — some in 2-foot piles — simply washed up along the shore, making the crustaceans a vital source of protein during those harsh New England winters. Fast-forward 400 years, and lobsters remain plentiful; by one estimate, the lobster industry catches some 200 million lobsters in the North Atlantic every year. Among those millions of lobsters are some truly eye-catching crustaceans — including the blue lobster, which is so rare that scientists estimate it’s a 1-in-2 million catch. Although such a rare find fetches a high price at the market, no evidence suggests that the blue lobsters (whose sapphire hue is caused by a genetic defect) taste any different than their normal-colored brethren. 

Most lobsters are red.

fact

FIB

Ready to reveal?

Confirm your email to play the next question?

sign up!

Please enter valid email.

Sign up

Oops, incorrect!

It's a fib

Lobsters are actually many colors (though most look brown) and only turn red when cooked. A lobster’s various natural hues come from the chemical astaxanthin, which binds with the protein crustacyanin. When boiled, astaxanthin is released, and the creature turns a reddish-orange.

Although blue lobsters are a rarity in the North Atlantic, they are far from the most exclusive crustacean living along the seabed. The Lobster Institute at the University of Maine says that finding a yellow lobster, for example, is a 1-in-30 million catch. But one of the most astounding finds of all came in 2011, when a British fisherman caught an albino lobster — estimated to be a 1-in-100 million catch. The 30-year-old lobster, which somehow avoided predators despite being easier to spot in the sea, didn’t end up on a dinner table. Instead, it was donated to the Weymouth Sea Life aquarium in England. 

• Share to Facebook
• Share to Twitter
• Share to Email

You might be good at multitasking, but you probably aren’t as good as the Alpine swift. The small, swallow-like bird found in Europe and Africa can remain in flight for 200 days while migrating, during which time they eat insects, groom themselves, and even sleep while airborne. Alpine swifts native to Switzerland will fly all the way to Western Africa in order to stay warm during winter, a distance of thousands of miles (and you thought the trip to Florida was long).

All birds migrate.

fact

FIB

Ready to reveal?

Confirm your email to play the next question?

sign up!

Please enter valid email.

Sign up

Oops, incorrect!

It's a fib

Migration comes with no shortage of hazards, and many birds — including ravens, great horned owls, quail, and myriad other species — simply don’t bother. This allows them to save energy, defend their territory, and more easily care for their young.

Weighing in at just one-fifth of a pound, Alpine swifts (Tachymarptis melba) are tiny but mighty. They spend almost their entire lives airborne, although they do roost and breed on cliff faces and other high, rocky areas. And they come from a distinguished family: Scientists have discovered that the closely related common swift (Apus apus) can stay airborne for up to 10 months uninterrupted, now considered the world’s longest continuous flight. Both birds have evolved to adapt to a life in the sky — swifts’ legs tend to be small and clumsy, making the creatures vulnerable to predators while they’re on the ground. Once airborne, though, they can fly fast and free.

• Share to Facebook
• Share to Twitter
• Share to Email

Superman might be the only thing faster than a speeding bullet, but he has some competition from mantis shrimp. Also known as “prawn killers” in Australia, these pint-sized pugilists punch with about the same force as a .22-caliber bullet. At 50 miles an hour, their punches are the fastest in the animal kingdom — and 50 times faster than the blink of an eye. When they decide to clobber their prey, mantis shrimp create 1,500 newtons of force with their claws; even more amazingly, their punches superheat the water around them to a temperature nearly as hot as the surface of the sun. Their clublike claws are coated in impact-resistant nanoparticles that allow the shrimp to punch to their heart’s content.

Mantis shrimp aren’t actually shrimp.

fact

FIB

Ready to reveal?

Confirm your email to play the next question?

sign up!

Please enter valid email.

Sign up

Oops, incorrect!

It's a fact

Despite its name, the mantis shrimp is neither a mantis nor a true shrimp. Members of the order Stomatopoda, they’re more closely related to crabs and lobsters.

Mantis shrimp use their incredible punching skills to both feed on and fight creatures larger than themselves: crabs, mollusks, gastropods, and other ocean dwellers unlucky enough to get in their way. Videos of the phenomenon are as popular as you might imagine, not least because peacock mantis shrimp, perhaps the most famous type, are so visually striking. Not all mantis shrimp punch, however. There are two main types of hunters — smashers and spearers — and only the former engage in high-speed clubbing. Spearers, meanwhile, impale their prey on spiky forelimbs — a slower but presumably no less painful end.

• Share to Facebook
• Share to Twitter
• Share to Email