If two pieces of metal touch in space, they become permanently stuck together.
Sound travels about 4 times faster in water than in air.
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
If your DNA was stretched out it would reach to the moon 6,000 times.
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere