In less than 24 hours, Australia’s oldest scientist will be injected with a lethal mix of drugs, closing the chapter on his 104-year life.

On Thursday (Switzerland time), Dr David Goodall will voluntarily end his life in an assisted dying clinic in Basel, north-west of Switzerland.

Dr Goodall will likely become the 45th person from Australia to have undergone euthanasia in a foreign country.

In the past 15 years, 44 Australians have travelled to Switzerland to end their lives through voluntary euthanasia, Dr Philip Nitschke, founder of euthanasia advocacy group Exit International, told The New Daily.

“There’s not going to be many people who have either the ability or the money or the willingness to go through what is quite a long and difficult journey,” Dr Nitschke said from Switzerland.