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Artwork showing cretaceous marine predators. Left to right is a non-descript invertebrate pursued by a 4 foot (1.2 metres) long Enchodus, followed by a 17 foot (5 metres) long Dolichorhynchops, followed by a 55 foot (17 metres) long Mosasaur. ©Walter MYERS/SPL/COSMOS Abstract The collapse of marine ecosystems during the end-Cretaceous mass extinction involved the base of the food chain up to ubiquitous vertebrate apex predators.

Abstract Weaning practices differ among great apes and likely diverged during the course of human evolution, but behavioral inference from the fossil record is hampered by a lack of unambiguous biomarkers.

Where do flowers come from - Shedding light on Darwin's "abominable mystery" The mystery that is the origin of flowering plants has been partially solved thanks to a team from the "Laboratoire de Phy

Where do flowers come from - Shedding light on Darwin's "abominable mystery" The mystery that is the origin of flowering plants has been partially solved thanks to a team from the "Laboratoire de Phy

Jets at the exit of the tank for similar conditions except wetting; hole radius = 1.75 mm; initial height = 10 cm. From hydrophilic to hydrophobic plate: (a) Glass, (b) Plexiglas, (c) Hydrophobic-glass. Left side: Zoom in of the jets at the hole exit to display the meniscus profiles for the different wetting conditions (i.e.

Formation mechanism of spontaneous dust traps(red) in a protoplanetary disk after the formation of a spontaneous dust trap, visible as a bright dust ring. JF Gonzalez? One of the major questions in astronomy today is how do planets form? Until recently, no theory has been able to provide a complete answer.

Single-Cell-Based Analysis Highlights a Surge in Cell-to-Cell Molecular Variability Preceding Irreversible Commitment in a Differentiation Process Abstract In some recent studies, a view emerged that stochastic dynamics governing the switching of cells from one differentiation state to another could be characterized by a peak in gene expression variability at the point of fate commitment.

Dorsal view of a Drosophila mutant embryo defective for the Zasp52 gene and marked for the adhesion molecule E-Cadherin (green) and the tubulin (red). Closure is complete, but cell shape is irregular. Scale bar= 10 microns. Two researchers from the Laboratoire de Biologie et Modélisation de la Cellule ( LBMC ) demonstrated that a structure, called the actin cable mediates scar-free wound healing.

Random directions of growth yield flowers of the correct size and shape. Credit S. Tsugawa, Hokkaido University. An international team (Cornell University, Hokkaido University, Max Planck Institute, Ecole normale supérieure de Lyon / Université Claude Bernard Lyon 1 / CNRS / INRA) unravels how random cell growth contributes to making organs reach the correct size and shape.

This little plant  Arabidopsis thaliana A team of the Plant Reproduction and Development laboratory ( RDP - Université de Lyon, ENS de Lyon, Université Claude Bernard Lyon 1, CNRS, INRA) just found that certain lipid species power an electrostatic field that controls protein localization at the cell surface.

Global patterns of adoption spreading are induced by local adoption cascades initiated by multiple spontaneous adopters arriving at a constant rate, amplified by a large number of adoptions induced by social influence, and controlled by individuals who are immune to the actual adoption. This study, published in This study is based on an observation of payed service adoptions evolved over 8 years on the social network of Skype, which connects over 500 million people all around the world.

The question, 'Where do domestic dogs come from'', has vexed scholars for a very long time. Some argue that humans first domesticated wolves in Europe, while others claim this happened in Central Asia or China. A new paper, published in Science, suggests that all these claims may be right.

View of the eruption of Vesuvius in 79 AD, from the bay of Naples, as imagined by the artist William Turner between 1817 and 1820 Almost two thousand years after the eruption of Vesuvius that destroyed Pompeii and Herculaneum, certain periods of the history of Naples have just been reconstructed. Until now, historians and archaeologists had wondered about the impact of this volcanic eruption on the Aqua Augusta aqueduct which supplied Naples and neighboring cities with water.

A research team of the Laboratory of Plant Reproduction and Developmen t (RDP - Inra, ENS de Lyon, CNRS, Université Claude Bernard Lyon 1), has just revealed that organs sense their own growth and can therefore control their final shape.

Catalytic nanoparticles contain various sites: for instance, the sites C (center of a hexagonal facet; nine neighbors marked in yellow), E (edge between two hexagonal facets; seven neighbors in green) and K (kink, at the corner between three facets; six neighbors in purple). Atoms at edges and terraces appear in light and dark blue, respectively.

Catalytic nanoparticles contain various sites: for instance, the sites C (center of a hexagonal facet; nine neighbors marked in yellow), E (edge between two hexagonal facets; seven neighbors in green) and K (kink, at the corner between three facets; six neighbors in purple). Atoms at edges and terraces appear in light and dark blue, respectively.