Knowledge has its boundary line, where it abuts on ignorance; on the outside of that boundary line are ignorance and miracles; on the inside of it are science and no miracles. — Horace Mann Copy Share Image
Scientists actively approach the door to knowledge—the boundary of the domain of what we know. We question and explore and we change our views when facts and logic force us to do so. We are confident only in what we… — Lisa Randall Copy Share Image
