For the First Time, Scientists Find Jellyfish-Like Animal With ‘Transient’ Anus

SaskiaAcht/iStock.com
SaskiaAcht/iStock.com

Compared to other parts of anatomy, the anus is underappreciated—but without a way to expel waste from the body, all the work that takes places at other stages of digestion wouldn't be good for much. Now scientists may have a better understanding of how the anus evolved after identifying the first "transient" anus in jellyfish, New Scientist reports.

As biologist Sidney L. Tamm reports in the journal Invertebrate Biology, the warty comb jelly (which is really a type of ctenophore, not a cnidarian like true jellyfish) doesn't have a visible anus most of the time. While studying the comb jelly, he discovered it forms one only when it needs to defecate. When waste builds up, the creature's gut or gastrodermis expands until it touches the outer layer known as the epidermis. At this point, the gastrodermis and the epidermis fuse together and form an orifice where there wasn't one before. Waste is disposed of through the newly opened anus, and once the jelly has finished its business, the hole closes up again and the gut and the epidermis go back to being two separate layers.

These two components each consist of a single cell layer, so the anal opening forms quickly. Mature warty comb jellies have to grow a new anus every hour or so, while their larvae do it about once every 10 minutes.

Jellyfish and comb jellies are simple organisms, with one inner tract instead of a more complex system of organs. Some jellies have one opening in their gastrodermis they use for eating, expelling waste, and exchanging reproductive materials. The discovery of the warty comb jelly's transient anus shows how this one-orifice system may have evolved into a tract with a permanent anus millions of years ago.

Comb jellies are some of the oldest animals on Earth, with ancestors appearing as far back as 700 million years ago. Scientists believe they helped set the evolutionary groundwork for systems that are essential to complex life today, such as the nervous system and digestive tract.

[h/t New Scientist]

Looking to Downsize? You Can Buy a 5-Room DIY Cabin on Amazon for Less Than $33,000

Five rooms of one's own.
Five rooms of one's own.
Allwood/Amazon

If you’ve already mastered DIY houses for birds and dogs, maybe it’s time you built one for yourself.

As Simplemost reports, there are a number of house kits that you can order on Amazon, and the Allwood Avalon Cabin Kit is one of the quaintest—and, at $32,990, most affordable—options. The 540-square-foot structure has enough space for a kitchen, a bathroom, a bedroom, and a sitting room—and there’s an additional 218-square-foot loft with the potential to be the coziest reading nook of all time.

You can opt for three larger rooms if you're willing to skip the kitchen and bathroom.Allwood/Amazon

The construction process might not be a great idea for someone who’s never picked up a hammer, but you don’t need an architectural degree to tackle it. Step-by-step instructions and all materials are included, so it’s a little like a high-level IKEA project. According to the Amazon listing, it takes two adults about a week to complete. Since the Nordic wood walls are reinforced with steel rods, the house can withstand winds up to 120 mph, and you can pay an extra $1000 to upgrade from double-glass windows and doors to triple-glass for added fortification.

Sadly, the cool ceiling lamp is not included.Allwood/Amazon

Though everything you need for the shell of the house comes in the kit, you will need to purchase whatever goes inside it: toilet, shower, sink, stove, insulation, and all other furnishings. You can also customize the blueprint to fit your own plans for the space; maybe, for example, you’re going to use the house as a small event venue, and you’d rather have two or three large, airy rooms and no kitchen or bedroom.

Intrigued? Find out more here.

[h/t Simplemost]

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A Wily Fox With a Passion for Fashion Stole More Than 100 Shoes From a Berlin Neighborhood

The smirk.
The smirk.
Brett Jordan, Unsplash

In Berlin, Germany, a fox has embarked on a crime spree that puts Dora the Explorer’s Swiper completely to shame.

CNN-News18 reports that residents of Zehlendorf, a locality in southeastern Berlin, spent weeks scratching their heads as shoes continued to disappear from their stoops and patios overnight. After posting about the mystery on a neighborhood watch site and reading accounts from various bewildered barefooters, a local named Christian Meyer began to think the thief might be a fox.

He was right. Meyer caught sight of the roguish robber with a mouthful of flip-flop and followed him to a field, where he found more than 100 stolen shoes. The fox appears to have an affinity for Crocs, but the cache also contained sandals, sneakers, a pair of rubber boots, and one black ballet flat, among other footwear. Unfortunately, according to BBC News, Meyer’s own vanished running shoe was nowhere to be seen.

Foxes are known for their playfulness, and it’s not uncommon for one to trot off with an item left unattended in a yard. Birmingham & Black Country Wildlife explains that foxes are drawn to “things that smell good,” which, to a fox, includes dog toys, balls, gardening gloves, and worn shoes. And if your former cat’s backyard gravesite is suddenly empty one day, you can probably blame a fox for that, too; they bury their own food to eat later, so a deceased pet is basically a free meal.

The fate of Zehlendorf’s furriest burglar remains unclear, but The Cut’s Amanda Arnold has a radical idea: that the residents simply let the fox keep what is obviously a well-curated collection.

[h/t CNN-News18]