The Sahara desert expands at about 1km per month.
90
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138