just breathe in. close your eyes. let it out. smile at the sunset.

the waterfall crashes nearby. fish in the distance sing amongst rocks.

population biology depends on models. competition models depend on extinction. two species cannot occupy the same niche. if you freeze time and stop growth, you can make a graph. in one possibility, one species drives the other to death. in another, the two can live side by side, but only temporarily.

a man and his dog run by along the rocky trail. the dog is slightly ahead. the man is old, and looks tired. they brush ahead out of sight. bark in the distance.