The germ responsible carries genes from other flu viruses
Critters spread many germs that can sicken each other — and even kill people
Wildlife can sometimes become infected with germs shed by people
A mysterious infection has been spreading for almost a year
Researchers in Antarctica drilled through a half-mile of ice to reach water that hasn’t had contact with the atmosphere for thousands of years.
Researchers harness science to encode — and decode — hidden messages
Germs that cause a so-called tropical disease make themselves at home in frosty Alaska