Man’s attempts to describe the universe consist of finding answers to the questions he puts to Nature:
How deep is a well? Toss in a rock.
Where is the cat? Hang a bell on him.
How far does a wild duck fly? Put a marker on his leg.
Where are the fireflies? Just watch at dusk.
Is our satellite still up? Listen for the radio signal.
Other questions arise in agricultural research:
How fast do roots grow? How deep? How soon does water get to them after a rain?
When does a mouthful of hay reach a cow’s stomach?
How long until nutrients get into her blood? Her milk?