Snowflakes falling at 2-4 mph can take about 1 hr to reach the ground.
A notch in a tree will remain the same distance from the ground as the tree grows.
Maggots were once used to treat a bone infection called osteomyelitis.
The largest recorded snowflake was 15in wide and 8in thick. It fell in Montana in 1887.
A 1960 Chilean earthquake was the strongest earthquake in recent times, which occurred off the coast, had a magnitude of 9.6 and broke a fault more than 1000 miles (1600 kilometers) long.
More than 56,000 square miles of natural forest are lost each year.
Elephants can swim - they use their trunk to breathe like a snorkel in deep water.
There are 4,300 known species of ladybugs in the world.
With only 4.3 percent of the world population, Americans use about one-third of the world's processed mineral resources and about one-fourth of the world's non-renewable energy sources, like oil and coal.
Mount Everest 8850 meter (29035 ft) Nepal/China is the tallest mountain.