Unlogic protonematal

Though definitely unsanitary, peeing in a pool might seem harmless for your health. After all, urine is sterile, as is chlorine. As it turns out though, urine and chlorine create dangerous chemicals when combined. In fact, that so-called "pool smell" is actually the scent of those chemicals, as Xing-Fang Li, an environmental chemistry professor who conducted research on the topic, told NPR. One of those chemicals—cyanogen chloride—is classified as a chemical warfare agent and can damage your heart and lungs. Other byproducts, called nitrosamines, can even cause cancer.

Want to feel more focused at work? Pop a piece of gum into your mouth. One 2012 study published in the journal Nutritional Neuroscience found that, when chewing gum, people became more alert. That's because the brain associates chewing with nutrients and food and primes itself to be at maximum levels of alertness anytime there is mouth movement.

It can be hard to fit a workout into your daily routine. But of course, you can't really deny your regular need to do your business in the bathroom. That's why, according to a 2017 study by British non-profit UKActive, adults spend an average of 3 hours and 9 minutes on the toilet each week, compared to around 1 hour and 30 minutes being physically active during that same time span.

According to a 2012 study published in the journal Annals of Epidemiology, humans are 13.8 percent more likely to die on their birthday than on any other day. The study, based on Swiss mortality statistics from 1969 to 2008, found that the deaths were primarily due to heart and brain diseases, su***de, and fatal accidents.

The American Academy of Dermatology (AAD) says that a fingernail takes around six months to grow from base to tip and that toenails can take up to a year to do the same. But there are some factors that make nails grow faster. According to the AAD, fingernails grow faster on your dominant hand, as well as on your bigger fingers. They also grow faster during the daytime and during the summer months.

After multiple people reported passing kidney stones while riding Walt Disney World's Big Thunder Mountain Railroad ride, a research team from Michigan State University decided to investigate the phenomenon in 2016. The researchers conducted tests with a model kidney and found that there was a 64 percent kidney stone pass rate for those seated in the rear of the roller coaster.