Around 520 million years ago, there was a period of rapid species diversification that many scholars describe as a sort of evolutionary "big bang." New modeling results from Caltech suggest that during this time period, the continents moved towards the equator instead of toward the poles.
Sleep is still a mysterious process that is difficult to study in vertebrate animals. By conducting a genetic screen in zebrafish, biologist David Prober and his colleagues have identified a gene that seems to serve as nature's stimulant.
Caltech, JPL, and NIST researchers have developed a simple, cost-effective laser frequency comb, potentially simplifying measurements of the telltale "wobbles" from stars that reveal the presence and properties of planets around other stars.