The COVID-19 pandemic changed the world as we know it — more than 9.6 million people died, and countless more became ill: According to the CDC, 77% of Americans have been infected at least once.

Children will deploy all sorts of tactics to avoid going to bed. Catherine Heymans’s youngest had a canny one: to distract his mum, an astronomer at the University of Edinburgh, UK, he asked her meaty ...