Imagination will often carry us to worlds that never were. But without it we go nowhere.
Extraordinary claim requires extraordinary proof.
Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another.
Science is more than a body of knowledge. It's a way of thinking: a way of skeptically interrogating the universe.
Books permit us to voyage through time, to tap the wisdom of our ancestors.
She had studied the universe all her life, but had overlooked its clearest message: For small creatures such as we the vastness is bearable only through love.