Original version

BBC World Service East and Southern Africa Schedule

BBC World Service East and Southern Africa

Science in Action

Science In Action

Factual: Science & Nature

Factual: Science & Nature: Science & Technology

The BBC brings you all the week's science news.

BBC World Service Australasia

BBC World Service Online

BBC World Service schedule for American satellite radio and the Caribbean

BBC World Service Americas and the Caribbean

BBC World Service

BBC World Service South Asia

BBC World Service Europe and the Middle East

BBC World Service West and Central Africa Schedule

BBC World Service West and Central Africa

BBC World Service East Asia

Science In Action: Hazard Mapping the Guatemalan Volcano

Magazines & Reviews

Hazard Mapping the Guatemalan Volcano

21/06/2018 GMT

BBC World Service - Science In Action, Hazard Mapping the Guatemalan Volcano

Understanding the risks and hazards of volcanic eruptions

Hazard Mapping the Guatemalan Volcano. Also electric fog nets, bacteria fishing for DNA and difficulties in researching the therapeutic effects of cannabis

Volcanologist Eliza Calder explains why the eruption of Volcán de Fuego in Guatemala on 3rd June was so devastating. It left at least 110 people dead and over 200 people missing. It’s thought that the local populations were so acclimatised to the rumblings and explosions of the ‘persistently active’ volcano, that they were slow to take action when it violently erupted. 

Electric Fog Nets 
Nets strung up to capture water droplets in the form of fog and mist are an old technology for getting fresh water in dry parts of the world. But they are ‘passive’ they rely on the water droplets in the air randomly coming into contact with the net. But new work by MIT engineer Kripa Varanasi has shown that if you apply an electrostatic force to the net, it ‘actively’ attracts the charged water droplets to it. Thereby increasing the amount of water collected.

Fishing for DNA 
Bacteria have the remarkable ability to take up DNA from their surroundings and incorporate it into their genomes. This ability allows the organisms to introduce variation and traits into their genetic code – traits such as antibiotic resistance or virulence. The trouble is, microbiologists knew little about how they performed this important procedure known as ‘natural transformation’. But now a group of scientists in the US have filmed (under very high magnification) the moment a bacterium reaches out with a special filament appendage (called a pilus) to snatch a piece of free floating DNA from its surroundings. And it looks a lot like going fishing!



Regulating Research on Cannabis
Using cannabis and other illegal drugs in science – do regulations of illegal drugs hinder legitimate medical research?

Picture: Fuego Volcano aftermath, Credit: European Photopress Agency

Presenter: Roland Pease
Producer: Fiona Roberts

Accessibility links

Programme Index

Science In Action

Hazard Mapping the Guatemalan Volcano

Genres

Formats

Brand

BBC World Service East and Southern Africa

About BBC World Service