Marlo the labrador is learning how to sniff out Covid-19 in the UK. In Tanzania, Thor is on the track of wildlife poachers. We see how their extraordinary noses are put to work. Show more
Discover 11,128,835 listings and 280,413 playable programmes from the BBC
Marlo the labrador is learning how to sniff out Covid-19 in the UK. In Tanzania, Thor is on the track of wildlife poachers. We see how their extraordinary noses are put to work. Show more
The BBC's international radio station
