Previous attempts to identify a unified theory of brain serotonin function have largely failed to
achieve consensus. In this present synthesis, we integrate previous perspectives with new …

The genetic basis for the emergence of creativity in modern humans remains a mystery
despite sequencing the genomes of chimpanzees and Neanderthals, our closest hominid …

This urgent and eye-opening book makes the case that protecting humanity's future is the
central challenge of our time. If all goes well, human history is just beginning. Our species …

The oldest Oldowan tool sites, from around 2.6 million years ago, have previously been
confined to Ethiopia's Afar Triangle. We describe sites at Nyayanga, Kenya, dated to 3.032 …

A scientist integrates evolutionary biology, genetics, psychology, economics, and more to
explore the development and workings of human societies.“There is no good reason why …

Human evolutionary scholars have long supposed that the earliest stone tools were made
by the genus Homo and that this technological development was directly linked to climate …

Homo naledi is a previously-unknown species of extinct hominin discovered within the
Dinaledi Chamber of the Rising Star cave system, Cradle of Humankind, South Africa. This …

Niche construction refers to the modification of selective environments by organisms.
Theoretical and empirical studies of niche construction are increasing in importance as foci …

Humans, unlike any other multicellular species in Earth's history, have emerged as a global
force that is transforming the ecology of an entire planet. It is no longer possible to …

INTRODUCTION Human speech manifests itself in spectacular diversity, ranging from
ubiquitous sounds such as “m” and “a” to the rare click consonants in some languages of …