Colouring can be relaxing and meditative, or a no-skills needed artistic expression. But it can also be a great way to learn something. Check out these books for learning about anatomy and nature while you meditate with your pencils.

The theory that close friends have their periods at the same time is over 40 years old now, but there has never been much evidence to support it. The people behind the period tracker Clue checked their own data recently and came up with another nail in the coffin: Zero evidence that closeness makes people bleed in sync.

Video: All the curls in the world won't build your biceps if you aren't eating enough protein. But how does the food you eat benefit your strength? This video breaks down what's happening in your body when you down that post-workout shake.

One hundred fifty years ago, the Great French Wine Blight nearly wiped out an industry that today produces some 40 billion bottles of wine a year. The only solution was a radical fusion of species that remains essential to the success of the wine market. Here's the story of how humanity hacked the wine grape.

We've all had those moments where we run into things and come away with a nasty bruise, but this DNews video explains why some of us seem to be more resilient and heal quickly while others of us seem to wake up with mystery bruises with no memory of where they came from.

This man clearly harbours no qualms about the cold. The native Norwegian achieved viral renown for skating on and swimming in Norway's Lake Goksjo almost entirely nude, save for a pair of Speedos and a wreath of ice worn round his neck. We know what you're thinking: How I can I be like this man? Let us show you the way.

Men routinely claim to be more tolerant of cold than women. But where does this physiological difference stem from, and are there any studies that have examined its veracity? Of course there are. Some of them even involve rectal thermometers.

If you've ever heard your own voice played back on a recording and thought "do I really sound like that?" you're not alone. Most of us at least cringe when we hear how we sound to others, and The Science of Us explains why, and what it says about us.

Not all naps are created equal. Some naps have been shown to rejuvenate where others boost creativity. What's more, when you nap can be as important as how you nap. Here's how to nap like a professional, nap-taking machine. Here's how to nap like you MEAN IT.

If you're about to fly somewhere, you're probably dreading the possibility that you'll catch a bug along the way. And with good reason: Many people come down with something nasty in the days following an aeroplane flight. Why does this happen, and how can you keep yourself from getting sick?

"Blue balls" is slang for that uncomfortable and often painful feeling in a guy's downstairs region, and it happens to some, not all, guys. But did you know that women can get it too? Blue balls and blue vulvas are very real, and we could all learn a thing or two about them in this video.

Teeth grinding is a problem that affects nearly one in ten individuals, yet many of us don't even realise we're doing it. And that's a problem given just how harmful it can be to our health. Here's how to find out if you grind your teeth when you sleep -- and why it's something you shouldn't ignore.

Illusionist and stunt performer Harry Houdini was famously capable of holding his breath for over three minutes. But today, competitive breath-hold divers can squeeze ten, fifteen, even twenty minutes out of a single lungful of air. How do these divers do it -- and how can you train to hold your breath for longer?