Sterilising water Cholera Chemicals or UV light kill pathogens in unclean water. Suitable hygiene - food Salmonella Cooking foods thoroughly and preparing them in hygienic conditions kills pathogens.

Other elements and compounds also exist in cycles. Many humans eat protein in the form of meat from other animals. Our bodies break this down into its constituent parts called amino acids and then use ...

A machine-learning breakthrough could lift the veil on Earth’s early history—and supercharge the search for alien life ...

Ask the publishers to restore access to 500,000+ books. An icon used to represent a menu that can be toggled by interacting with this icon. A line drawing of the Internet Archive headquarters building ...

View the latest from the world of psychology: from behavioral research to practical guidance on relationships, mental health and addiction. Find help from our directory of therapists, psychologists ...

An illustration of a magnifying glass. An illustration of a magnifying glass.