“Why Scientists Love Chasing Bats. The threat to humans from animal viruses is small. The financial incentive to pretend otherwise is large”/ WSJ

Physics can predict the behavior of simple systems very accurately. For a ball tossed in the air, you can solve an equation that reliably tells the trajectory.
But most things that happen in the world have many causes and many effects, and the causes and effects interact. In order to make predictions, computer programmers write…