There are seven trillion galaxies in the known Universe.
The hat was invented by John Batterson in 1865.
By 2021 there will be over 1 billion surveillance cameras installed around the world.
Rock layers are dated by the period in which they formed.
Moss was the first plant on earth.
It takes more than 500 years to form 2 cm of topsoil.
Sir Isaac Newton invented the colour wheel.
There are 197 countries in the world.
Japan has 108 active volcanoes.
Pumpkins grow on vines and have seeds, which means they are a fruit, not a vegetable.
Taxonomy is the science of naming a new species.
The Danish language has no word for “please”.