From a rhythm that weaves itself through memory to our relationship with deep time, Josie Long presents a countdown of numerically-inspired short documentaries.

The EverywhenFeaturing Dave Johnston-Pitt and Sam Juparulla WickmanProduced by Jaye Kranz

The Yelling Birds of the PresidioFeaturing Jenny Phillips, who also shared the field recordings used to create this pieceProduced by Kalli Anderson and Kaija Siirala

Counting to SixAccordion played by Kaveh Ghaffari, Tonbak by Farhad Asadi and Pedal Steel by Michael Eckert Produced by Arif Mirbaghi

Curated by Axel Kacoutié, Eleanor McDowall and Andrea RangecroftSeries Producer: Eleanor McDowallA Falling Tree production for BBC Radio 4