Click: South Africa's last white president speaks about his friendship with Nelson Mandela. Click: Mandela and Archbishop Desmond Tutu, two anti-apartheid icons, pose with Tutu's grandchildren. Click: Mandela offers a self-deprecating memory in a handwritten note.

At a news conference in Johannesburg on Tuesday, Mandela's archivists and Google said their $1.25 million project to digitally preserve a record of the anti-apartheid leader's life is now online. The project was first announced a year ago.

Researchers - and anyone else - from around the world now have access to hundreds of documents, photographs and videos. The archive has been launched with more than 1,900 entries, and more are being added.