Anne Boleyn (with head in situ).
How long does the brain remain conscious after decapitation?
George Stinney, a 14-year old wrongfully executed for murder in 1944.
M. Watt Espy Papers, University at Albany
The National Death Penalty Archive collects documents and paraphernalia behind the thousands of executions that have taken place on American soil.
Indonesian activists hold candles during a candlelight protest against death penalty executions, outside the presidential palace in Jakarta in 2016.
Research shows the deterrent effect of capital punishment is a myth.
Pope Francis said the death penalty, can never be sanctioned because it ‘attacks’ the inherent dignity of all humans.
AP Photo/Andrew Medichini, file
Pope Francis has said that death penalty violates the dignity of a person. But, this might just deepen the debate among Christians, who for a long time have been divided over the issue.
Youssef Rabih Youssef/EPA
The British home secretary has decided not to seek assurances from the US that it wouldn't use the death penalty for an IS duo arrested in Syria. This must be opposed.
Iwao Hakamada in 2014.
Iwao Hakamada was tried for quadruple murder in 1966, but the evidence that convicted him is regarded with widespread scepticism.
Zimbabwean President Emmerson Mnangagwa opposes capital punishment.
Survey shows Zimbabwean policy makers need not fear a public backlash if they choose to abolition of the death penalty.
Kenya Wildlife Service rangers on patrol at the Meru National Park.
Kenya's death penalty proposal is not the quick fix solution to curb wildlife poaching.
Aum Shinrikyo cult leader Shoko Asahara at the time of his sentencing in 2004.
The 1995 Tokyo sarin attack helped make Japanese criminal justice dramatically more punitive.
A petition calls for clemency on a convicted drug trafficker sentenced to death in 2010.
Singapore claims to have nearly eliminated drug use and crime thanks to capital punishment - but the data tells a very different story.
Vietnam War protests led to a lower voting age. The Parkland shooting could push similar reevaluations.
AP Photo/Gerald Herbert
Teens' brains develop different skills along a predictable timeline. These milestones should influence the legal age boundaries for voting, buying guns and being put to death.
The newly completed execution chamber at Ely State Prison in Ely, Nevada.
Nevada Department of Corrections via AP
Nevada plans to use a new drug protocol for executing Scott Dozier, who murdered a 22-year-old. A scholar explains why this is problematic.
In the Western world, the U.S. is one of only one of two countries with capital punishment, and support remains strongest in the 'Bible Belt'. Here's a look at the historic arguments within Christian communities over the death penalty.
Supreme Court Justice Anthony Kennedy administers the judicial oath to Justice Neil Gorsuch.
AP Photo/Evan Vucci
Trump's promise to appoint conservatives to the Supreme Court could mean the fate of the death penalty rests in the court of public opinion.
A wall of Myuran Sukumaran’s self portraits at the Sydney Festival exhibition Myuran Sukumaran: Another Day in Paradise.
Most people who see Myuran Sukumaran: Another Day in Paradise, opening today as part of the Sydney Festival, will already have a strong opinion on the artist and his death – but a few may have their minds changed.
Shahram Amiri in 2010 after returning to Iran from the US.
Vahid Salemi / AP/Press Association Images
Shahram Amiri is one of 250 people executed this year despite President Rouhani's efforts to improve his country's human right's record.
Indonesia is in the midst of another round of executions.
Advocacy efforts are easier to dismiss when they are seen to reflect vested interests more than principled foundations.
Capital punishment is unfairly imposed, innocent people are regularly condemned and it is patently ineffective in deterring crime. So why to states retain the death penalty?
Demonstration against the death penalty in Paris.
World Coalition Against the Death Penalty
Not only does capital punishment not deter crime but it's more expensive than keeping a convicted murderer in prison for life.
Time for a jolly singalong.
Wellcome Library, London
People found out about crime and punishment in that most spectacular era of public executions, the Renaissance, through melody.