Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Only about 2% of the world population has green eyes.
36
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
Lurch, a Watusi bull, had the largest horns in the world.
32
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14