
Through it, Mary learned that Angels were Dust, and rebel Angels had spent centuries guiding human discovery as revenge on the tyrannical Angel known as ‘The Authority’ (or monotheistic God, worshipped by the Magisterium), who wanted humanity to remain ignorant and subservient.

When Mary hooked Lyra up to the computer (a way to communicate with Dust, much like the alethiometer), she was astounded. There, she met physicist Dr Mary Malone, who was studying dark matter/Dust using a quantum computer. Lyra’s alethiometer told her to seek ‘the Scholar’ to learn more about Dust, and so Will took her to his Oxford to do that. John Parry – who disappeared years earlier – would be able to lead him. Boreal regularly travelled between Lyra and Will’s worlds in search of artefacts including the Subtle Knife, to which he hoped Will’s father Col. There, Lyra met the daemon-less Will, who’d run through the window from his Oxford to escape Lord Boreal and the police after he accidentally killed Boreal’s lackey.

After Lyra’s father Lord Asriel killed Roger to open a window between worlds, Lyra and Pan followed Asriel through and ended up in Cittàgazze – a city where all the adults had either fled or been turned into soulless husks by Spectres (floating creatures attracted to ‘Dust’ and so only attack adults, because children aren’t surrounded by the elementary particles).
