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  Credit:  Cozy Home / Shutterstock You Need Salt to Live Sodium helps your body manage water; without it, your cells can start to swell. This condition is called  hyponatremia , and it can cause serious medical problems. It’s generally a good idea to  watch your salt intake  to make sure that you don’t get too much — but sodium is really about balance, and it’s possible to  not get enough . Hyponatremia is often caused by medication and certain underlying health problems, but it can also be caused by drinking too much water (this is  very hard to do ) or alcohol. Note:  The above comes directly from their website.  Click here to read more.

  Why Do We Say “Eat Your Heart Out”? “Eat your heart out” isn’t just a great advertising slogan for an all-you-can-eat buffet. It’s also a phrase most commonly used in a boastful manner to induce feelings of envy, regret, and other similar emotions. If someone tells you to eat your heart out, they might be lauding an accomplishment over your head. For instance, maybe you expressed some doubt they would get a promotion at work, and they want to brag a bit. As to why the heart was chosen out of all the organs for this phrase, perhaps it’s because our hearts are so deeply intertwined with passion and emotions, unlike the kidneys or skin, for example. Note:  The above comes directly from their website.  Click here to read more.

  Credit:  GKlps / Shutterstock Sea Turtles Cry Out Excess Salt If you look closely, you may notice a  sea turtle crying  when it comes ashore. It’s not because it’s sad — it’s because their bodies take in more salt from the sea than they can excrete in their urine. They have a gland in each eye that excretes salt into their tears. It’s always working, but it only looks like tears outside the water. Some butterflies in the western Amazon, low on reliable sources of sodium, gather around river turtles and  drink their tears , too. Note:  The above comes directly from their website.  Click here to read more.

  Credit:  Chris So / Toronto Star via Getty Images McDonald’s Is the World’s Largest Toy Distributor Since the creation of the  Happy Meal  in  1979 , McDonald’s has leapfrogged industry giants such as Hasbro and Mattel to become the world’s largest toy distributor. Early Happy Meal toys included stencils and spinning tops, though the trinkets were later designed as part of advertising campaigns to promote family movies, like 1989’s  The Little Mermaid . All told, McDonald’s distributes  1.5 billion toys  worldwide each year. As part of a recent effort to be more environmentally conscious, the company has pledged to largely  phase out  plastic toys in Happy Meals, and vowed to work to provide kids with plant-based or recycled toys instead. Note:  The above comes directly from their website.  Click here to read more.

  Original photo by Gogosvm/ iStock Marmosets call each other by name. Most of our pet cats and dogs know their names, but they (probably) didn’t come up with those names on their own. In fact, only one nonhuman primate is known to use names: the humble  marmoset . The small, chatty monkeys have joined a highly exclusive club that also includes parrots and dolphins, as  research  from 2024 notes that marmosets use unique vocalizations to label one another.  Marmosets are highly social creatures, and their whistle-like “ phee calls ” are meant to inform fellow group members of their location. The study found that when marmosets who knew each other were placed in the same room with a barrier that blocked them from seeing one another, they not only engaged in  chitchat  but used unique vocalizations for one another — essentially, names. Conservation biologist George Wittemyer of Colorado State University, who led  a similar study  that found Afr...

  One Perfect Minute with Pygmy slow Loris Babies These two tiny pygmy slow loris babies,  the first ever born at Smithsonian’s National Zoo , each weighed somewhere between three nickels and a AA battery at birth in March 2024. Two months later, the nocturnal primates were learning to explore their arboreal exhibit. This Smithsonian’s National Zoo video  captures one perfect minute of the two-month-old siblings as they eagerly eye  waxworms  offered by tongs. Near the end of the video, papa Pabu can’t resist swooping in to snatch the treat. Note:  The above comes directly from their website.  Click here to read more.