Science provides a much more satisfactory way to seek answers than does any religion.

If you want grown-ups to recycle, just tell their kids the importance of recycling, and they'll be all over it.

For me, the meaning of life is pretty clear: Living things strive to pass their genes into the future.

Hard to find anything lovelier than a tree. They grow at right angles to a tangent of the nominal sphere of the Earth.

Religion is a completely different thing from the claim that the Earth is six thousand years old. That's just crazy.

I often reflect on what an extraordinary time (pun intended) it is to be alive here in the beginning of the twenty-first century. It took life billions of years to get to this point. It took humans thousands of years to piece together a meaningful understanding of our cosmos, our planet and ourselves. Think how fortunate we are to know this much. But think also of all that's yet to be discovered. Here's hoping the deep answers to the deep questions-from the nature of consciousness to the origin of life-will be found in not too much more time.

Apparently there is redundancy in memory: You store the same memory in different parts of your brain for accessing at different speeds. That speed would depend on the frequency of use and the importance of the knowledge.