One cubic mile of seawater contains about 50 pounds of gold.
79
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
The names of the continents all end with the same letter with which they start, excluding the North and South infront of AmericA.
86
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Australia's Great Barrier Reef is 1,250 miles long!
45
The water of the Antarctica is so cold that nothing can rot there.
334