The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
In 1850, only 8% of the people in California were women.
0
Forest fires move faster uphill than downhill.
52
The water between India and Sri Lanka is only 3-30 feet deep and was purportedly passable on foot until 1480 AD when a cyclone moved some sand around.
1
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 Amazon rainforest produces more than 20% the world's oxygen supply.
182
The state of Florida is bigger than England!
74