Choir pulses in tune at Llangollen Eisteddfod
Choir members' pulse rates can synchronise when they sing together, scientists in Sweden claim.
Researchers say that when people sing in unison, their pulses go up and down at the same rate.
The BBC's Wales correspondent, Hywel Griffith, reports from the Llangollen International Musical Eisteddfod.
09 Jul 2013
- From the section Wales