On Menorca, sealed wooden and antler tubes preserved human hair dating to 1100–800 BCE. Chemical analysis revealed atropine, scopolamine, and ephedrine, showing Bronze Age Europeans used hallucinogens ...

Learn foundational steps to turn your ideas into a real business—including research, creating a plan and selecting the best structure for your goals. If you like to learn by flipping real pages and ...

Personalised medicine uses information about a person and their cancer to help with diagnosis and treatment. It is sometimes called precision medicine. Doctors use samples of your blood, or of your ...

A RECENT communication from this laboratory 1 appears in some ways to have been misunderstood. We did not claim that the machine described was more sensitive than that of other workers, but described ...