The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
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 Sahara desert expands at about 1km per month.
90
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
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
The Atlantic Ocean is saltier than the Pacific Ocean.
54