Dr Eben Alexander believes he finally has an answer to the age old question; what happens when you die?
The 63-year old was suffering from a brain infection in 2008 when he fell into a week long coma.
Medical professionals did not give him much chance of surviving and Dr Alexander was so close to death he believes he got a glimpse of the afterlife.
In his book, Living in a Mindful Universe: A Neurosurgeon’s Journey Into the Heart of Consciousness, Dr Alexander says he was placed on a medical ventilator after doctors gave him just a two percent chance of survival.
At this point, the brain surgeon believes he began his ascent towards Heaven where he saw a strange light and heard music.
Dr Alexander said: “It was a circular entity, emitting heavily music that I called the Spinning Melody. The light opened up like a rip.
“And I felt myself going through the rip, up into a valley of lush and fertile greenery, where waterfalls glowed into crystal pools.
“There were clouds, like marshmallow puffs of pink and white.
“Behind them, the sky was a rich blue-back, with trees, fields and animals and people.
“There was water, too, flowing in rivers or descending as rain.
“Mists rose from the pulsing surfaces of these waters and fish glided beneath them.”
Dr Alexander is a strong believer in the afterlife, and said: “The evidence for near-death experiences is overwhelming.
“But the evidence for how they occur is virtually non-existent.”
However, scientists have in fact given a possible explanation.
Dr Sam Parnia, director of critical care and resuscitation research at NYU Langone School of Medicine in New York City, told a recent Oz Talk: “People describe a sensation of a bright, warm, welcoming light that draws people towards it.
“They describe a sensation of experiencing their deceased relatives, almost as if they have come to welcome them. They often say that they didn’t want to come back in many cases, it is so comfortable and it is like a magnet that draws them that they don’t want to come back.
“A lot of people describe a sensation of separating from themselves and watching doctors and nurses working on them.”
Dr Parnia said there are scientific explanations for the reaction, and says seeing people is not evidence of the afterlife, but more likely the brain just scanning itself as a survival technique.
He said thanks to modern technology and science “death does not have to be limited to philosophy and religion, but it can be explored through science”.
“They can hear things and record all conversations that are going on around them.”