Humans get most of the blame for climate change with little attention paid to the contribution of other natural forces. Now, scientists are shedding light on one potential cause of the cooling trend of the past 45 million years that has everything to do with the chemistry of the world's oceans.
By pairing an intimate knowledge of immune-system function with a deep understanding of statistical physics, a cross-disciplinary team has arrived at a surprising finding: T cells use a movement strategy to track down parasites that is similar to strategies that predators use to hunt their prey.
Clément Gilbert, chercheur au CNRS et Cédric Feschotte, professeur à l'université du Texas, expliquent que 8 % du génome humain est constitué d'éléments fournis par des virus, que nous avons recyclés pour certaines de nos fonctions cellulaires.
Scientists have, for the first time, visualized the motion of electrons during a chemical reaction. The new findings in the experiment are of fundamental importance for photochemistry and could also assist the design of more efficient solar cells.
Un trou d'une taille équivalente à cinq fois la surface de l'Allemagne s'est ouvert dans la couche d'ozone au-dessus de l'Arctique, égalant pour la première fois la diminution observée dans l'Antarctique.
The physical model to describe the hydrophobic interactions of molecules has been a mystery that has challenged scientists and engineers since the 19th century. Researchers have developed a method to study these forces at the atomic level, and have for the first time defined a mathematical equation.
In recent decades, Arctic sea ice has suffered a dramatic decline that exceeds climate model predictions. The unexpected rate of ice shrinkage has now been explained. Researchers argue that models underestimate the rate of ice thinning, which is actually about four times faster than calculations.