A biosensor has been developed that attaches to a phone and uses bacteria to detect unsafe arsenic levels

Researchers say the results help explain why some children are more prone to developing infections than others

The chemical composition of the Earth's core is still poorly understood, despite more than 60 years of research

Chickens that are genetically modified to produce human proteins in their eggs can offer a cost-effective method of producing certain types of drugs

Analysis of the skulls of lions, wolves, and hyenas has helped scientists uncover how prehistoric dogs hunted 40 million years ago

Malaria parasites have evolved to be most infectious at the time of day when mosquitoes feed, to maximize the chance of being spread

The newly discovered species was nearly five meters long and had large, pointed teeth for grasping prey