ESCHER’S famous lithograph of ever ascending and descending stairs is a clever optical illusion; the Shepard-Risset glissando plays the same kind of trick on our ears. Trevor Cox presents AUDITORY ILLUSIONS (RADIO 4, 11.30AM), explaining how the glissando makes us think that its pitch is constantly rising, and talking to musicians, composers and psychologists about other sounds that can fool the ear.
ANTARCTICA is a cold, windy, harsh environment, and one where the wildlife photographer John Aitchison has been spending a lot of time. John has been working on the BBC’s latest big nature series, Seven Worlds, One Planet, filming the perilous early days of gentoo penguin chicks as they totter down to the cold sea for the first time. John
will be IN THE STUDIO (BBC WORLD SERVICE,
11.30AM, 11.30PM) to tell us about the long and painstaking process behind the making of this series.
FIXIE FARR is always trying to sort out other people’s problems. One day, as she sits in a coffee bar, a handsome man asks her to look after his laptop, then insists on returning the favour. The singer and actress Kerry Ellis (pictured) recommends Sophie Kinsella’s bestseller about the fixing of Fixie’s life in this week’s edition of A GOOD READ (RADIO 4, 4.30PM).