Mona Lisa's secrets are unlocked as Da Vinci's painting techniques are recreated. Her elusive smile is the perfect combination of art, science, optics and illusion – the greatest triumph of ...

So grab a cup of coffee, a tablet (the paper kind) and a good old-fashioned No. 2 pencil and get started. Your own Mona Lisa is just waiting to appear.

And while we may never know with 100% certainty what the bridge is in the background, more than 10 million people visit the Louvre every year to see the Mona Lisa, making it the most famous ...