The real challenge is to work out what aliens might actually be like.

There are plenty of dead scientists I admire, but I can't think of any living ones. This is probably because it is only in retrospect that one can see who made the important contributions.

We are only the temporary custodians of the particles which we are made of. They will go on to lead a future existence in the enormous universe that made them

One can't prove that God doesn't exist. But science makes God unnecessary. The laws of physics can explain the universe without the need for a creator.

We believe human begins have existed for only a small fraction of cosmic history, because human race has been improving so rapidly in knowledge and technology that if people had been around for millions of years, the human race would be much further along in it's mastery.

A zero-gravity flight is a first step toward space travel.

However difficult life may seem, there is always something you can do and succeed at.