Science has often resisted new ideas and fought bitterly to prevent them coming on board.

Just plain logic says that the war on drugs does not work. It absolutely does not work. We have this highly addictive legal drug called tobacco which has never resulted in people being sent to prison, but there has been a massive reduction in its consumption simply because responsible adults looking at their own bodies have said they don't want to do that to themselves.

Do we as adults have the right to make decisions about what we put in our own bodies and what we experience with our own consciousness without reference to the powers of the state, or must we seek permission from the state in order to explore our own consciousness?

It may be that DMT makes us able to perceive what the physicist call "dark matter" - the 95 per cent of the universe's mass that is known to exist but that at present remains invisible to our senses and instruments.

I see myself as a journalist reporting neglected stories about our past and trying to bring rigor, reason and intuition to the quest.

The use of language around drugs is really important. So we find that it's increasingly difficult in our society to find the word "drug" not connected to the word "abuse." The notion of a responsible use of drugs is written out in the language of our culture.

There are all kinds of ways to challenge ourselves. Some people do it by climbing a mountain or scuba diving. The most profound and challenging ordeals is to drink Ayahuasca. It is in a way the ultimate adventure.