If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
The Atlantic Ocean is saltier than the Pacific Ocean.
54
One cubic mile of seawater contains about 50 pounds of gold.
79
The average ice berg weighs 20,000,000 tons!
54
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48