Researchers discovered that the absence of one critical gene made the plague less virulent, and may have allowed two major ...

A change to a single gene in the bacterium Yersinia pestis has enabled one of the world’s most notorious pathogens to survive ...

PARIS: For most, the day after September 11, 2001, brought profound sorrow and a sense of vulnerability. For Tim Friede, it ...

Tim Friede was feeling particularly down on the day after the September 11 attacks, so he went to his basement and let two of ...

Tim Friede has been bitten by snakes hundreds of times — often on purpose. Now scientists are studying his blood in hopes of creating a better treatment for snake bites. Friede has long had a ...

Tim Friede was feeling particularly down on the day after the Sept.11 attacks, so he went to his basement and let two of the ...

The natural marvels, which do everything from enabling acrobatic flight to insulating against Antarctic cold, continue to ...

Scientists have documented the way a single gene in the bacterium that causes bubonic plague, Yersinia pestis, allowed it to ...

Learn more about Yersinia pestis, the bacteria behind the ‘Black Death,' which changed over time to cause less virulent, but ...

Tim Friede has been bitten by snakes hundreds of times — often on purpose. Now scientists are studying his blood in hopes of ...