There're many things banned in space: like salt and bread, because crums can damage the equipment. When it comes to beverages, carbonated drinks are off the table as well because they're buoyant in a weightless environment. But pencils are also prohibited to use in space. Why? The answer will surely surprise you... Here're the coolest facts about space to share with your friends. You'll learn why the Moon is not entirely white and devoid of color. And why astronauts need to exercise that much while in space.

You can google anything you want on the Internet. It's full of answers to any questions, lifehacks, or tips to solve any problem. But isn't it so much cooler to impress you friends or classmates with your knowledge even without peeping at the screen of your gadget? For example, have you ever wondered why beds aren't right on the floor? A long time ago, people didn't elevate their mattresses off the floor. This practice started in ancient Egypt and continued in many other cultures. Why was it convenient? And why do we still make beds so high off the floor?

Do you know everything about the objects surrounding you? When something is built or created for the first time, there is typically a logical explanation for every part of the object in question. But with time we tend to forget the initial purpose and some of the important features of the object. Here're 70+ secrets about things you see every day. From metal button on jeans to a hole in the handle of pots - you'll get to know the original purpose of these details. By the way, do you know how to tell if the boiled egg was fresh? Twist it! I'll tell you more about it at the end of the video.

Have you ever experienced this: after you’ve been using something for many years, you found out that it had some other useful features? Like a tiny detail you never even paid attention to, turned out to have an important meaning and purpose. For example, that dark rectangle at the end of your toothpaste tube. Have you ever noticed one? The markings are there for the assembly machines - this way the machines know where to cut and fold each tube. From metal plates at the front of your stapler to the little triangles above each window on a plane... Every object surrounding you has a cool detail. There are many overlooked features about the things surrounding you that actually serve a useful purpose. Let's discover the secrets of ordinary things!

As humans we see an amazing world full of colors with our eyes. But many animals see much more than us. And the way they use their vision is largely unknown to us. For example, octopuses do not have color vision but they can detect polarized light. But it's not the coolest vision out there... Mantis shrimp vision puts everything else to shame. They're the proud owners of the strangest eyes in animal kingdom. What makes their eyes so cool? No other creature has such a unique structure of its visual organ. Each eye has several pupils that constantly change their shape. They can move separately and together, focus on some small objects and see the big picture at the same time.

Do you sometimes feel guilty for being lazy all day? It might seem like you’ve worked for several hours, but still haven't really done anything. Perhaps you urgently need to complete an important task, but you deliberately put it off, or you can't focus. If this sounds familiar, it’s probably not your fault, but your smartphone's. Well, that plus your brain and a unique substance inside it called dopamine. So how to train yourself to check your phone less? Life without smartphones seems impossible. Talking to friends, likes, YouTube, movies, photos, games – we love all the stuff they provide. But we’re so into our phones that we don't notice the bad sides: short attention spans, poor work capacity, and stress. Are there any ways to use your phone less? We’ve got a solution.

You know the feeling. You’re in a familiar place…but everything’s a little off. A stranger is chasing you. Street signs look like gibberish. You’d normally go for your phone, but it’s nowhere to be found. You’re in a dream, and here’s why it’s so different from reality! So what are dreams anyway? And why do we dream? Well, it’s basically your mind trying to reconstruct reality…and failing. In dreams, everything gets mixed around and turned into a mess by our hidden thoughts and feelings. It’s the emotional side of your brain constructing this world, not the logical part that’s more in control in your waking life. Dreams can be fascinating, terrifying, or just weird. Let's listen to some interesting facts about dreams!