Wood is usually not associated with water filters, even less with electronic devices. But scientists at the University of Maryland say we have not yet discovered all the possibilities of this cheap, natural and sustainable material. VOA's George Putic reports.
In many parts of the world invasive species contribute to destruction of local ecosystems, already threatened by climate change. One of the most pervasive is the lionfish, a voracious predator from Asia that is depleting native coral reef fish in the Caribbean. Now, a new underwater robot is showing off a way that technology can help on the front line fight against invasive species. VOA’s George Putic reports.