Humans v. the Grand Canyon
Years ago I heard that everything the
whole human race ever made could be
bulldozed into the Grand Canyon and not fill it.
Here's my estimate showing that is true.
How Much Has the Human Race Built?
The interstate highway system is often cited
as the largest object ever built.
Here's the total volume of
all the highways in the world:
50 feet wide (4 lanes) x 1 foot deep x 300,000 km
20 yards x .3 yards x 300 million yards = 2 billion cubic yards
Volume of the Grand Canyon
The volume of the Grand Canyon is estimated to be 5.45 trillion cubic yards,
which is 3000 times larger than all the highways put together. Humans do make
a few other things, like airplanes and cars, but they can't possibly add enough
to fill the canyon.