In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
A cow produces around 200,000 glasses of milk in her lifetime.
373
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
The strangers in your dreams are actually people that you've seen in real life.
50