One cubic mile of seawater contains about 50 pounds of gold.
79
The state with the longest coastline in the Continental U.S. is Michigan.
31
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
Longest officially recognized place name is Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu.
112
The average ice berg weighs 20,000,000 tons!
54