Life-Saving Antibiotics Could Be Hidden in Caves

The rise of drug-resistant bacteria has created a huge need for new kinds of antibiotics but you can't easily synthesize new antibiotics in a lab - you have to find them in nature. Microbiologist Naowarat Cheeptham has been looking for them in an unlikely place: deep underground in caves, where organisms that have evolved in harsh conditions could provide the key to fighting superbugs. (video by: Katherine Wells, Ryo Ikegami, Alan Jeffries)