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Some people love the feeling of cracking their knuckles, while others cringe at the sound. But what causes that trademark pop? And is it dangerous? Eleanor Nelsen gives the facts behind joint popping.

Is the science of Orphan Black realistic? Could we clone humans, or engineer them to have customized traits? We take a look at today's genetic engineering technologies to find out if designer babies and human cloning is, or should be, a reality.

Watch 138 people shatter the Vertical Skydiving World Record as they form a snowflake formation at speeds up to 220 mph!

His talk was given at a local TEDx event, produced independently of the TED Conferences. "The earth is flat". "Home computers are useless". "Humanity is condemned to be starved". "Women are born inferior". Throughout the years, pioneering scientific discoveries overturn established theories, vibrant societies transcend dominant perceptions, bold individuals expand physical and intellectual limits proving everything wrong: This is the way in which we seek to improve our lives and to deepen the understanding of the world around us. At TEDxLimassol we are searching for the next refute in small and large things: In the universe and subatomic particles. In our societies and in our bodies. In our behavior, attitudes and perceptions. In our mental, physical and personal capabilities. Proving everything wrong is always the right thing to do.

The GoPro production crew journeys to Africa to explore the danger and beauty of Kevin Richardson's passions for lions and their future.

Is sitting too much killing you?

Rocket scientists incorporate a number of different testing techniques before committing a rocket to flight. One of those tests is called a "static test." In this setup a rocket engine is fired while being anchored to a test bench. Fitted with instrumentation, the scientist can safely measure thrust, pressure, cooling, and other rocket data. Watch and witness from inside the inferno when something goes wrong.

Is it all just make believe?

A weekly show where we endeavor to answer one of your big questions. This week, a bunch of people asked, "Why doesn't glue stick to the inside of the bottle?"

The earth has been through some major changes!

William Mitchell takes an enchanting dive into an infinite sea of Silversides in Grand Cayman.

I almost broke my brain with a backwards bicycle for the sake of Science.

Introducing Masterpiece, an Osmo app that will allow you to supercharge your drawing skills! Pick any image from the camera, curated gallery, or integrated web search and Masterpiece will transform it into easy-to-follow lines and help you draw it to perfection. You can then share a magical time-lapse video of your creation with your friends and family.

Learned helplessness can prevent people from achieving their goals, something I've experienced first hand.

Additional information: Calbuco volcano has 2003 meters height (6572ft). The impressive ashes column you see in the video had a calculated height of 15km (9.3mil), from which you clearly see about 10km (6.2mil) before to get lost inside the atmosphere static zone where the ashes created a huge and dense cloud that now is traveling around the world.

How to thread a balloon onto a skewer. Fun magic trick perfect for parties. Impress adults and children with this simple trick. All you need is a balloon, a skewer and some washing up liquid.

Struggle to get poached eggs right? Here's a great cooking tip which shows you how to cook the perfect poached egg with a lovely runny yolk. Really simple Kitchen tip and gives great results.

Professor Richard Muller, of Berkeley Earth Foundation, discusses his views on climate change and how he hopes we can leave a better planet for our children.

This is the solution to: http://youtu.be/QD3hbVG1yxM

With humor and persistence, filmmaker Morgan Spurlock dives into the hidden but influential world of brand marketing on his quest to make a completely sponsored film about sponsorship. (And yes, onstage naming rights for this talk were sponsored too. By whom and for how much? He'll tell you.)

Should you stress about stress?