In any case, the leading edge of our "on purpose" radio signals is 30 light-years away and, if intercepted, may mend the aliens' image of us based on the radio bubble of our television shows. But this will happen only if the aliens can somehow determine which type of signal comes closer to the truth of who we are, and what our cosmic identity deserves to be.

It’s short-sighted to think ads won’t one day end up wherever humans are - even the moon.

I suppose I can live with missing decimals, missing floors to tall buildings, and floors that are named instead of numbered. A more serious problem is the limited capacity of the human mind to grasp the relative magnitudes of large numbers. Counting at the rate of one number per second...to count to a trillion takes 32,000 years, which is as much time as has elapsed since people first drew on cave walls.

Only when you question does society move or advance at all.

When students cheat on exams, it's because our school system values grades more than students value learning.

Pretending to know everything closes the door to finding out what's really there.

We have people who believe they are scientifically literate but, in fact, are not.