As we enter lockdown again, I am reminded of the article David Dale wrote last year in the Sydney Morning Herald about Isaac Newton’s self-isolation during the plague year 1665-66 and how he passed the time.

‘Newton was 23, a student at Cambridge. When the black plague spread there from London, he retreated to his birthplace – Woolsthorpe Manor, near the town of Grantham (later the birthplace of Margaret Thatcher). During what he called his “annus mirabilis”, or wonderful year, at Woolsthorpe, Newton did three significant things:

He invented the mathematical system called calculus,

He drilled a hole in the shutter of his bedroom window and held a prism up to the beam of sunlight that came through it, discovering that white light is made up of every colour (and giving Pink Floyd an iconic album cover), and

He watched apples falling from the trees in his garden and theorised about a force called gravity, which keeps the moon revolving around planet Earth. (He later wrote: “I can calculate the movement of heavenly bodies, but not the madness of people.”)’