I have found the missing link between the higher ape and civilized man; it is we.

We had better dispense with the personification of evil, because it leads, all too easily, to the most dangerous kind of war: religious war.

Few animals display their mood via facial expressions as distinctly as cats.

The truth about an animal is far more exciting and altogether more beautiful than all the myths woven about it.

It ought to be realized by all dog owners that obesity shortens a dog's life quite considerably, a life which is much too short anyhow.

The scientist knows very well that he is approaching ultimate truth only in an asymptotic curve and is barred from ever reaching it; but at the same time he is proudly aware of being indeed able to determine whether a statement is a nearer or a less near approach to the truth.

More than any other product of human scientific culture scientific knowledge is the collective property of all mankind.