A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
Australia's Great Barrier Reef is 1,250 miles long!
45
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Check your map! Virginia extends farther west than West Virginia.
67
The Sahara desert expands at about 1km per month.
90
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138