10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
The average ice berg weighs 20,000,000 tons!
54
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
Forest fires move faster uphill than downhill.
52
The water of the Antarctica is so cold that nothing can rot there.
334