Does heaven exist? With well over 100,000 plus recorded and described spiritual experiences collected over 15 years, to base the answer on, science can now categorically say yes. Furthermore, you can see the evidence for free on the website allaboutheaven.org.

Available on Amazon
also on all local Amazon sites, just change .com for the local version (.co.uk, .jp, .nl, .de, .fr etc.)


This book, which covers Visions and hallucinations, explains what causes them and summarises how many hallucinations have been caused by each event or activity. It also provides specific help with questions people have asked us, such as ‘Is my medication giving me hallucinations?’.

Available on Amazon
also on all local Amazon sites, just change .com for the local version (.co.uk, .jp, .nl, .de, .fr etc.)

Some science behind the scenes

Blood brain barrier

The blood–brain barrier (BBB) is the mechanism by which circulating blood is ‘filtered’ in such a way that unwanted molecules, pathogens or other substances in the blood are unable to enter the brain.

Cells at three key interfaces form barriers between the blood and the CNS. 

The barrier is actually not a gate as such but a rather complex set of mechanisms all of which have a filtering function  - BBB-endothelial cells, astrocyte end-feet, and pericytes (PCs).  

Endothelial cells, for example,  restrict the diffusion of both microscopic objects (e.g., bacteria) and large or hydrophilic molecules from getting into the cerebrospinal fluid (CSF), while allowing the diffusion of small hydrophobic molecules (O2, CO2, hormones).

Cells of the barrier actively transport metabolic products such as glucose across the barrier with specific proteins.  But the blood brain barrier can be disrupted via

  • Osmosis 
  • Biochemically by the use of vasoactive substances such as bradykinin
  • Blockage

It can also be by passed if any of the substances tags a ride using an endogenous substance such as glucose.  If it is an endogenous substance it will get through.


For iPad/iPhone users: tap letter twice to get list of items.