A centuries-old sketch of a bearded man has been identified as Leonardo da Vinci.
The picture, which is held in the Royal Collection in the UK, is thought to have been drawn just before the renaissance man's death 500 years ago this year.
That would make it only the second surviving portrait of da Vinci that was made during his lifetime.
It will now go on display at the Queen's Gallery at Buckingham Palace.

US, South Korea to cut length, scope of military drills after Trump order
Israeli airstrike kills nine Palestinians at Gaza police station
Thai schools hold shooting response drills after deadly school attack
Bus-truck head-on collision in Parana, Brazil kills at least 21
At least 9 killed in hotel fire in India's Kolkata
