## We are basically missing the entire vertical dimension

Up a 50 ft tree is extremely high for us

## We are evolved to cope with surface elevations from a tall tree to a deep free dive

The main Biosphere is 40,000 km around but only about 31km thick

## That's a factor of 1,290 to 1.

Counting from the highest point of the troposphere to 2km under Challenger Deep

## The moon looks close, but it's actually 30.25 Earth diameters away

For context, the International Space Station is 420 km up, or 1/2 inch off the ground