Scientists discovered the only known ecosystem that consists of just one organism in a gold mine in South Africa. This ecosystem could be a model for early life on Earth or other planets.
Scientists say the power of copper to fight germs lies in the fact that copper ions separate on contact with bacteria and cause irreversible damage to the bacteria's cells.
Health care workers in emergency departments are often carriers of the methicillin-resistant Staphylococcus aureus (MRSA), potentially putting patients at risk.