The Sahara desert expands at about 1km per month.
90
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62
The average ice berg weighs 20,000,000 tons!
54
Longest officially recognized place name is Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu.
112
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18