Sometimes I'm so tired I look down at what I'm wearing and if it's comfortable enough to sleep in I don't even make it into my pajamas. I'm looking down and I'm like 'T-shirt and stretchy pants? Yup that's fine. It's pajama-y good night.'
Sure science involves trial and error. Scientists refine theories each day. But as they do they help us grasp more clearly the wonders of the world and the universe.