Bacteria from humans can generate electricity by Ian Woolf, Vanessa Pirotta uses drones to sample whale snot. Production checked by Charles Willock, Presented and Produced by Ian Woolf Support Diffusion by making a contribution Photo curtesy of Joanne Stephan bitcoin: 1AEnJC8r9apyXb2N31P1ScYJZUhqkYWdU2 ether: 0x45d2cd591ff7865af248a09dc908aec261168395