I had learned that a dexterous, opposable thumb stood among the hallmarks of human success. We had maintained, even exaggerated, this important flexibility of our primate forebears, while most mammals had sacrificed it in specializing their digits. Carnivores run, stab, and scratch. My cat may manipulate me psychologically, but he'll never type or play the piano.

Misunderstanding of probability may be the greatest of all general impediments to scientific literacy.

Wonder and knowledge are both to be cherished.

Objectivity cannot be equated with mental blankness; rather, objectivity resides in recognizing your preferences and then subjecting them to especially harsh scrutiny — and also in a willingness to revise or abandon your theories when the tests fail (as they usually do).

¿Por qué el origen de la vida pluricelular se dio en forma de un corto pulso a través de tres faunas radicalmente diferentes , y no como un aumento lento y continuo de complejidad? La historia de la vida es infinitamente fascinante, infinitamente curiosa, pero ciertamente no es la sustancia de nuestros pensamientos y esperanzas usuales.

This new consensus seemed so compelling that Ernst Mayr, the dean of modern Darwinians, opened the ashcan of history for a deposit of Geoffrey's ideas about anatomical unity.

People, as curious primates, dote on concrete objects that can be seen and fondled. God dwells among the details, not in the realm of pure generality. We must tackle and grasp the larger, encompassing themes of our universe, but we make our best approach through small curiosities that rivet our attention - all those pretty pebbles on the shoreline of knowledge. For the ocean of truth washes over the pebbles with every wave, and they rattle and clink with the most wondrous din.

The most erroneous stories are those we think we know best - and therefore never scrutinize or question.

A man does not attain the status of Galileo merely because he is persecuted; he must also be right.