Being double jointed doesn't mean you have an extra joint – an expert in biomechanics explains what makes some people doubly bendy.
Your teeth started to grow even before you were born.
Some people have extra fingers, others have missing muscles.
Pets, like guinea pigs, lead very different lives to humans – and that's why they need very different eyes, too.
The short answer is we have evolved to have nails because they help us pick things up (like food) and pick things off (like bugs).
When my kidneys stopped working properly, my dad gave me one of his kidneys. Thanks, Dad.
Clicking joints tend to run in families. Here's what causes it.
What colours we see depends not just on how things are in the world around us, but also on what happens in our eyes and our brains.
Pins and needles are a warning to tell us to move our limbs about, because long-term nerve entrapment can cause permanent damage.
Every human carries an instruction booklet with a very special code, called DNA. Our eyes cannot read the code, but our bodies can. The code tells our body what to do and how to look.
We don't control our heart – it's an involuntary muscle – but special pacemaker cells help keep it ticking away.
What is it that makes us feel drunk when we drink? And why do we keep drinking if it can make us feel so terrible?
Many children in New Zealand grow up barefoot. Should all children follow this model?
Flying plays havoc with people's ears. But it's a lot worse if your cabin suddenly loses pressure.
The loud noise might be a warning that there is something falling nearby, or flying towards you. Our brain tells our eyes to quickly shut, to help protect them from any damage.
Does the heart really have cockles or heartstrings? An anatomist clears up some misconceptions...and lends credence to others.
Basic anatomical knowledge can save lives.
We've come a long way since the dark days of grave robbing to provide bodies for dissection. Now, there are ceremonies and memorials to honour people who have donated their body to science.
Most people don't know if they have a hidden extra organ. But they're surprisingly common and often harmless.
These birds spend long periods, often asleep, standing on one leg. Is it passive biomechanics or active nervous system control of their muscles that allows them to do easily what's impossible for us?