The earth rotates more slowly on its axis in March than in September.
145
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
The population of the Earth has more than doubled since 1950.
151
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131