Why Are Public Toilet Seats U-Shaped?

iStock
iStock

There’s a difference between a public toilet and the one in your house, and it’s not the smell: their seats are shaped differently. Almost all public restrooms have what are called open front toilet seats, which are shaped like the letter u and have an opening at the front. Most private bathrooms, by contrast, have oval or round toilet seats that wrap all the way around the toilet. Why the gap?

The two-prong, open-front seat is required by the plumbing codes adopted by most public authorities in the U.S. “All water closet seats, except those within dwelling units, shall be either of the open front type or have an automatic seat cover dispenser,” as California’s state plumbing code reads [PDF]. The requirement was first included in the American Standard National Plumbing Code in 1955, and in the Uniform Plumbing Code in 1973, according to Dan Cole, a Technical Services Manager with the International Association of Plumbing and Mechanical Officials (IAPMO).

This is largely a matter of hygiene. No matter what kind of junk you’re packing, u-shaped seats give you a little breathing room to avoid touching the seat with your genitals, and provide one less place for urine to splash.

Open-front toilet seats are largely designed to make it easier for women to wipe, according to Lynne Simnick, the senior vice president of code development at the IAPMO. The opening is designed to “allow women to wipe the perineal area after using the toilet without contacting the seat,” she says. So basically, open toilet seats are designed for front-wipers. (Clearly the ladies in question have not been lectured on how to prevent UTIs.)

U-shaped seats are also cheaper, since they use less material. And they’re less likely to be stolen, according to Roger Barry, the managing director of Healthmatic, a UK-based company that designs and manages public restrooms. Though I question why anyone would want to steal a public toilet seat, he says that theft is a major problem. “The appearance of u-shaped seats is something that has dampened in the UK,” he reports, mostly because public toilets are no longer fitted with toilet seats at all to combat stealing.

Indeed, we should be grateful to have any toilet seats at all in public washrooms.

Why Are Sloths So Slow?

Sloths have little problem holding still for nature photographers.
Sloths have little problem holding still for nature photographers.
Geoview/iStock via Getty Images

When it comes to physical activity, few animals have as maligned a reputation as the sloth. The six sloth species, which call Brazil and Panama home, move with no urgency, having seemingly adapted to an existence that allows for a life lived in slow motion. But what makes sloths so sedate? And what horrible, poop-related price must they pay in order to maintain life in the slow lane?

According to HowStuffWorks, the sloth’s limited movements are primarily the result of their diet. Residing mainly in the canopy vines of Central and South American forests, sloths dine out on leaves, fruits, and buds. With virtually no fat or protein, sloths conserve energy by taking a leisurely approach to life. On average, a sloth will climb or travel roughly 125 feet per day. On land, it takes them roughly one minute to move just one foot.

A sloth’s digestive system matches their locomotion. After munching leaves using their lips—they have no incisors—it can take up to a month for their meals to be fully digested. And a sloth's metabolic rate is 40 to 45 percent slower than most mammals' to help compensate for their low caloric intake. With so little fuel to burn, a sloth makes the most of it.

Deliberate movement shouldn’t be confused for weakness, however. Sloths can hang from branches for hours, showing off some impressive stamina. And because they spend most of their time high up in trees, they have no need for rapid movement to evade predators.

There is, however, one major downside to the sloth's leisurely lifestyle. Owing to their meager diet, they typically only have to poop once per week. Like going in a public bathroom, this can be a stressful event, as it means going to the ground and risking detection by predators—which puts their lives on the line. Worse, that slow bowel motility means they’re trying to push out nearly one-third of their body weight in feces at a time. It's something to consider the next time you feel envious of their chill lifestyle.

Have you got a Big Question you'd like us to answer? If so, let us know by emailing us at bigquestions@mentalfloss.com.

Are Any of the Scientific Instruments Left on the Moon By the Apollo Astronauts Still Functional?

Apollo 11 astronaut Neil Armstrong left the first footprint on the Moon on July 20, 1969.
Apollo 11 astronaut Neil Armstrong left the first footprint on the Moon on July 20, 1969.
Heritage Space/Heritage Images/Getty Images

C Stuart Hardwick:

The retroreflectors left as part of the Apollo Lunar Ranging Experiment are still fully functional, though their reflective efficiency has diminished over the years.

This deterioration is actually now delivering valuable data. The deterioration has multiple causes including micrometeorite impacts and dust deposition on the reflector surface, and chemical degradation of the mirror surface on the underside—among other things.

As technology has advanced, ground station sensitivity has been repeatedly upgraded faster than the reflectors have deteriorated. As a result, measurements have gotten better, not worse, and measurements of the degradation itself have, among other things, lent support to the idea that static electric charge gives the moon an ephemeral periodic near-surface pseudo-atmosphere of electrically levitating dust.

No other Apollo experiments on the moon remain functional. All the missions except the first included experiment packages powered by radiothermoelectric generators (RTGs), which operated until they were ordered to shut down on September 30, 1977. This was done to save money, but also because by then the RTGs could no longer power the transmitters or any instruments, and the control room used to maintain contact was needed for other purposes.

Because of fears that some problem might force Apollo 11 to abort back to orbit soon after landing, Apollo 11 deployed a simplified experiment package including a solar-powered seismometer which failed after 21 days.

This post originally appeared on Quora. Click here to view.

SECTIONS

arrow
LIVE SMARTER