Biology

All life on Earth is made of molecules that twist in the same direction. New research reveals that this may not always have been so.

Microscopic creatures called bdelloid rotifers have thrived without mating for millions of years. How they did it could reveal why sex is so essential for almost everyone else.

The same mental processes that organize memories may also coordinate how we make decisions.

The 2014 Nobel Prize in Physiology or Medicine was awarded to three researchers who discovered how the brain navigates the world. Their work may also help illuminate how the mind stores memories.

A study of diverse colonies of spiders supports a controversial idea in evolution — that natural selection can act on communities as well as on individuals.

The movement of lizards around the Caribbean is forcing researchers to account for human activity in even their most basic ecological models.

A massive statistical study suggests that even though genetic changes happen at random, the final evolutionary outcome — fitness — is predictable.

Nature’s large-scale patterns emerge from incomplete surveys that borrow ideas from information theory.

Our bodies are a genetic patchwork, possessing variation from cell to cell. Is that a good thing?