Forest growth in the US has exceeded harvest since the 1940’s. Today, we have more trees than any time in the past 100 years.
14
The average ice berg weighs 20,000,000 tons!
54
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
Forest fires move faster uphill than downhill.
52
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48