Evolution is the central unifying theme of biology. Yet today, more than a century and a half after Charles Darwin proposed the idea of evolution through natural selection, the topic is often ...

Gymnosperms, one of the major lineages of extant seed plants, encompass conifers, cycads, Ginkgo and gnetophytes. Recent decades have seen the integration of diverse data streams—morphological ...

Nucleosynthesis encompasses the network of nuclear reactions that forge the elements within stars and during stellar death. In the cores of main-sequence stars, hydrogen burning via the proton–proton ...

A species is a population of organisms that interbreeds and has fertile offspring. Living organisms have descended with modifications from species that lived before them. Natural selection explains ...

During the final breakout session, convocation participants met in four groups organized by areas of expertise—faculty, funders, education researchers and professional developers, and representatives ...