Darwin's theory of natural selection provides an explanation for why organisms develop traits that help them survive and reproduce.

By analyzing E. coli protein levels, scientists found a surplus of membrane shuttle proteins that may play a role in antibiotic resistance.

The company said it will stop the Phase III trial of ExPEC after interim results found it failed to demonstrate efficacy over placebo.

Sanofi and Johnson & Johnson ended development of an experimental vaccine after it failed to adequately protect against an ...